Compact a response
Compact a conversation. Returns a compacted response object.
Learn when and how to compact long-running conversations in the conversation state guide. For ZDR-compatible compaction details, see Compaction (advanced).
ParametersExpand Collapse
body: ResponseCompactParams { model, input, instructions, 2 more }
model: "gpt-5.4" | "gpt-5.4-mini" | "gpt-5.4-nano" | 89 more | (string & {}) | nullModel ID used to generate the response, like gpt-5 or o3. OpenAI offers a wide range of models with different capabilities, performance characteristics, and price points. Refer to the model guide to browse and compare available models.
Model ID used to generate the response, like gpt-5 or o3. OpenAI offers a wide range of models with different capabilities, performance characteristics, and price points. Refer to the model guide to browse and compare available models.
Text, image, or file inputs to the model, used to generate a response
Text, image, or file inputs to the model, used to generate a response
Array<ResponseInputItem>
EasyInputMessage { content, role, phase, type } A message input to the model with a role indicating instruction following
hierarchy. Instructions given with the developer or system role take
precedence over instructions given with the user role. Messages with the
assistant role are presumed to have been generated by the model in previous
interactions.
A message input to the model with a role indicating instruction following
hierarchy. Instructions given with the developer or system role take
precedence over instructions given with the user role. Messages with the
assistant role are presumed to have been generated by the model in previous
interactions.
Text, image, or audio input to the model, used to generate a response.
Can also contain previous assistant responses.
Text, image, or audio input to the model, used to generate a response. Can also contain previous assistant responses.
A list of one or many input items to the model, containing different content
types.
A list of one or many input items to the model, containing different content types.
ResponseInputImage { detail, type, file_id, image_url } An image input to the model. Learn about image inputs.
An image input to the model. Learn about image inputs.
role: "user" | "assistant" | "system" | "developer"The role of the message input. One of user, assistant, system, or
developer.
The role of the message input. One of user, assistant, system, or
developer.
phase?: "commentary" | "final_answer" | nullLabels an assistant message as intermediate commentary (commentary) or the final answer (final_answer).
For models like gpt-5.3-codex and beyond, when sending follow-up requests, preserve and resend
phase on all assistant messages — dropping it can degrade performance. Not used for user messages.
Labels an assistant message as intermediate commentary (commentary) or the final answer (final_answer).
For models like gpt-5.3-codex and beyond, when sending follow-up requests, preserve and resend
phase on all assistant messages — dropping it can degrade performance. Not used for user messages.
Message { content, role, status, type } A message input to the model with a role indicating instruction following
hierarchy. Instructions given with the developer or system role take
precedence over instructions given with the user role.
A message input to the model with a role indicating instruction following
hierarchy. Instructions given with the developer or system role take
precedence over instructions given with the user role.
A list of one or many input items to the model, containing different content
types.
A list of one or many input items to the model, containing different content types.
ResponseInputImage { detail, type, file_id, image_url } An image input to the model. Learn about image inputs.
An image input to the model. Learn about image inputs.
role: "user" | "system" | "developer"The role of the message input. One of user, system, or developer.
The role of the message input. One of user, system, or developer.
ResponseOutputMessage { id, content, role, 3 more } An output message from the model.
An output message from the model.
content: Array<ResponseOutputText { annotations, text, type, logprobs } | ResponseOutputRefusal { refusal, type } >The content of the output message.
The content of the output message.
ResponseOutputText { annotations, text, type, logprobs } A text output from the model.
A text output from the model.
annotations: Array<FileCitation { file_id, filename, index, type } | URLCitation { end_index, start_index, title, 2 more } | ContainerFileCitation { container_id, end_index, file_id, 3 more } | FilePath { file_id, index, type } >The annotations of the text output.
The annotations of the text output.
URLCitation { end_index, start_index, title, 2 more } A citation for a web resource used to generate a model response.
A citation for a web resource used to generate a model response.
status: "in_progress" | "completed" | "incomplete"The status of the message input. One of in_progress, completed, or
incomplete. Populated when input items are returned via API.
The status of the message input. One of in_progress, completed, or
incomplete. Populated when input items are returned via API.
phase?: "commentary" | "final_answer" | nullLabels an assistant message as intermediate commentary (commentary) or the final answer (final_answer).
For models like gpt-5.3-codex and beyond, when sending follow-up requests, preserve and resend
phase on all assistant messages — dropping it can degrade performance. Not used for user messages.
Labels an assistant message as intermediate commentary (commentary) or the final answer (final_answer).
For models like gpt-5.3-codex and beyond, when sending follow-up requests, preserve and resend
phase on all assistant messages — dropping it can degrade performance. Not used for user messages.
ResponseFileSearchToolCall { id, queries, status, 2 more } The results of a file search tool call. See the
file search guide for more information.
The results of a file search tool call. See the file search guide for more information.
status: "in_progress" | "searching" | "completed" | 2 moreThe status of the file search tool call. One of in_progress,
searching, incomplete or failed,
The status of the file search tool call. One of in_progress,
searching, incomplete or failed,
results?: Array<Result> | nullThe results of the file search tool call.
The results of the file search tool call.
attributes?: Record<string, string | number | boolean> | nullSet of 16 key-value pairs that can be attached to an object. This can be
useful for storing additional information about the object in a structured
format, and querying for objects via API or the dashboard. Keys are strings
with a maximum length of 64 characters. Values are strings with a maximum
length of 512 characters, booleans, or numbers.
Set of 16 key-value pairs that can be attached to an object. This can be useful for storing additional information about the object in a structured format, and querying for objects via API or the dashboard. Keys are strings with a maximum length of 64 characters. Values are strings with a maximum length of 512 characters, booleans, or numbers.
ResponseComputerToolCall { id, call_id, pending_safety_checks, 4 more } A tool call to a computer use tool. See the
computer use guide for more information.
A tool call to a computer use tool. See the computer use guide for more information.
status: "in_progress" | "completed" | "incomplete"The status of the item. One of in_progress, completed, or
incomplete. Populated when items are returned via API.
The status of the item. One of in_progress, completed, or
incomplete. Populated when items are returned via API.
action?: Click { button, type, x, 2 more } | DoubleClick { keys, type, x, y } | Drag { path, type, keys } | 6 moreA click action.
A click action.
Click { button, type, x, 2 more } A click action.
A click action.
DoubleClick { keys, type, x, y } A double click action.
A double click action.
Drag { path, type, keys } A drag action.
A drag action.
Flattened batched actions for computer_use. Each action includes an
type discriminator and action-specific fields.
Flattened batched actions for computer_use. Each action includes an
type discriminator and action-specific fields.
Click { button, type, x, 2 more } A click action.
A click action.
DoubleClick { keys, type, x, y } A double click action.
A double click action.
Drag { path, type, keys } A drag action.
A drag action.
ComputerCallOutput { call_id, output, type, 3 more } The output of a computer tool call.
The output of a computer tool call.
ResponseFunctionWebSearch { id, action, status, type } The results of a web search tool call. See the
web search guide for more information.
The results of a web search tool call. See the web search guide for more information.
action: Search { query, type, queries, sources } | OpenPage { type, url } | FindInPage { pattern, type, url } An object describing the specific action taken in this web search call.
Includes details on how the model used the web (search, open_page, find_in_page).
An object describing the specific action taken in this web search call. Includes details on how the model used the web (search, open_page, find_in_page).
ResponseFunctionToolCall { arguments, call_id, name, 4 more } A tool call to run a function. See the
function calling guide for more information.
A tool call to run a function. See the function calling guide for more information.
FunctionCallOutput { call_id, output, type, 2 more } The output of a function tool call.
The output of a function tool call.
The unique ID of the function tool call generated by the model.
Text, image, or file output of the function tool call.
Text, image, or file output of the function tool call.
An array of content outputs (text, image, file) for the function tool call.
An array of content outputs (text, image, file) for the function tool call.
ResponseInputImageContent { type, detail, file_id, image_url } An image input to the model. Learn about image inputs
An image input to the model. Learn about image inputs
ToolSearchCall { arguments, type, id, 3 more }
ResponseToolSearchOutputItemParam { tools, type, id, 3 more }
The loaded tool definitions returned by the tool search output.
The loaded tool definitions returned by the tool search output.
FunctionTool { name, parameters, strict, 3 more } Defines a function in your own code the model can choose to call. Learn more about function calling.
Defines a function in your own code the model can choose to call. Learn more about function calling.
FileSearchTool { type, vector_store_ids, filters, 2 more } A tool that searches for relevant content from uploaded files. Learn more about the file search tool.
A tool that searches for relevant content from uploaded files. Learn more about the file search tool.
A filter to apply.
A filter to apply.
ComparisonFilter { key, type, value } A filter used to compare a specified attribute key to a given value using a defined comparison operation.
A filter used to compare a specified attribute key to a given value using a defined comparison operation.
CompoundFilter { filters, type } Combine multiple filters using and or or.
Combine multiple filters using and or or.
Array of filters to combine. Items can be ComparisonFilter or CompoundFilter.
Array of filters to combine. Items can be ComparisonFilter or CompoundFilter.
ComparisonFilter { key, type, value } A filter used to compare a specified attribute key to a given value using a defined comparison operation.
A filter used to compare a specified attribute key to a given value using a defined comparison operation.
The maximum number of results to return. This number should be between 1 and 50 inclusive.
ranking_options?: RankingOptions { hybrid_search, ranker, score_threshold } Ranking options for search.
Ranking options for search.
ComputerTool { type } A tool that controls a virtual computer. Learn more about the computer tool.
A tool that controls a virtual computer. Learn more about the computer tool.
ComputerUsePreviewTool { display_height, display_width, environment, type } A tool that controls a virtual computer. Learn more about the computer tool.
A tool that controls a virtual computer. Learn more about the computer tool.
WebSearchTool { type, filters, search_context_size, user_location } Search the Internet for sources related to the prompt. Learn more about the
web search tool.
Search the Internet for sources related to the prompt. Learn more about the web search tool.
type: "web_search" | "web_search_2025_08_26"The type of the web search tool. One of web_search or web_search_2025_08_26.
The type of the web search tool. One of web_search or web_search_2025_08_26.
search_context_size?: "low" | "medium" | "high"High level guidance for the amount of context window space to use for the search. One of low, medium, or high. medium is the default.
High level guidance for the amount of context window space to use for the search. One of low, medium, or high. medium is the default.
user_location?: UserLocation | nullThe approximate location of the user.
The approximate location of the user.
The two-letter ISO country code of the user, e.g. US.
The IANA timezone of the user, e.g. America/Los_Angeles.
Mcp { server_label, type, allowed_tools, 7 more } Give the model access to additional tools via remote Model Context Protocol
(MCP) servers. Learn more about MCP.
Give the model access to additional tools via remote Model Context Protocol (MCP) servers. Learn more about MCP.
allowed_tools?: Array<string> | McpToolFilter { read_only, tool_names } | nullList of allowed tool names or a filter object.
List of allowed tool names or a filter object.
McpToolFilter { read_only, tool_names } A filter object to specify which tools are allowed.
A filter object to specify which tools are allowed.
Indicates whether or not a tool modifies data or is read-only. If an
MCP server is annotated with readOnlyHint,
it will match this filter.
An OAuth access token that can be used with a remote MCP server, either with a custom MCP server URL or a service connector. Your application must handle the OAuth authorization flow and provide the token here.
connector_id?: "connector_dropbox" | "connector_gmail" | "connector_googlecalendar" | 5 moreIdentifier for service connectors, like those available in ChatGPT. One of
server_url or connector_id must be provided. Learn more about service
connectors here.
Currently supported connector_id values are:
- Dropbox:
connector_dropbox
- Gmail:
connector_gmail
- Google Calendar:
connector_googlecalendar
- Google Drive:
connector_googledrive
- Microsoft Teams:
connector_microsoftteams
- Outlook Calendar:
connector_outlookcalendar
- Outlook Email:
connector_outlookemail
- SharePoint:
connector_sharepoint
Identifier for service connectors, like those available in ChatGPT. One of
server_url or connector_id must be provided. Learn more about service
connectors here.
Currently supported connector_id values are:
- Dropbox:
connector_dropbox - Gmail:
connector_gmail - Google Calendar:
connector_googlecalendar - Google Drive:
connector_googledrive - Microsoft Teams:
connector_microsoftteams - Outlook Calendar:
connector_outlookcalendar - Outlook Email:
connector_outlookemail - SharePoint:
connector_sharepoint
Optional HTTP headers to send to the MCP server. Use for authentication or other purposes.
require_approval?: McpToolApprovalFilter { always, never } | "always" | "never" | nullSpecify which of the MCP server's tools require approval.
Specify which of the MCP server's tools require approval.
McpToolApprovalFilter { always, never } Specify which of the MCP server's tools require approval. Can be
always, never, or a filter object associated with tools
that require approval.
Specify which of the MCP server's tools require approval. Can be
always, never, or a filter object associated with tools
that require approval.
always?: Always { read_only, tool_names } A filter object to specify which tools are allowed.
A filter object to specify which tools are allowed.
Indicates whether or not a tool modifies data or is read-only. If an
MCP server is annotated with readOnlyHint,
it will match this filter.
never?: Never { read_only, tool_names } A filter object to specify which tools are allowed.
A filter object to specify which tools are allowed.
Indicates whether or not a tool modifies data or is read-only. If an
MCP server is annotated with readOnlyHint,
it will match this filter.
CodeInterpreter { container, type } A tool that runs Python code to help generate a response to a prompt.
A tool that runs Python code to help generate a response to a prompt.
container: string | CodeInterpreterToolAuto { type, file_ids, memory_limit, network_policy } The code interpreter container. Can be a container ID or an object that
specifies uploaded file IDs to make available to your code, along with an
optional memory_limit setting.
The code interpreter container. Can be a container ID or an object that
specifies uploaded file IDs to make available to your code, along with an
optional memory_limit setting.
CodeInterpreterToolAuto { type, file_ids, memory_limit, network_policy } Configuration for a code interpreter container. Optionally specify the IDs of the files to run the code on.
Configuration for a code interpreter container. Optionally specify the IDs of the files to run the code on.
memory_limit?: "1g" | "4g" | "16g" | "64g" | nullThe memory limit for the code interpreter container.
The memory limit for the code interpreter container.
network_policy?: ContainerNetworkPolicyDisabled { type } | ContainerNetworkPolicyAllowlist { allowed_domains, type, domain_secrets } Network access policy for the container.
Network access policy for the container.
ImageGeneration { type, action, background, 9 more } A tool that generates images using the GPT image models.
A tool that generates images using the GPT image models.
action?: "generate" | "edit" | "auto"Whether to generate a new image or edit an existing image. Default: auto.
Whether to generate a new image or edit an existing image. Default: auto.
background?: "transparent" | "opaque" | "auto"Background type for the generated image. One of transparent,
opaque, or auto. Default: auto.
Background type for the generated image. One of transparent,
opaque, or auto. Default: auto.
input_fidelity?: "high" | "low" | nullControl how much effort the model will exert to match the style and features, especially facial features, of input images. This parameter is only supported for gpt-image-1 and gpt-image-1.5 and later models, unsupported for gpt-image-1-mini. Supports high and low. Defaults to low.
Control how much effort the model will exert to match the style and features, especially facial features, of input images. This parameter is only supported for gpt-image-1 and gpt-image-1.5 and later models, unsupported for gpt-image-1-mini. Supports high and low. Defaults to low.
input_image_mask?: InputImageMask { file_id, image_url } Optional mask for inpainting. Contains image_url
(string, optional) and file_id (string, optional).
Optional mask for inpainting. Contains image_url
(string, optional) and file_id (string, optional).
model?: (string & {}) | "gpt-image-1" | "gpt-image-1-mini" | "gpt-image-1.5"The image generation model to use. Default: gpt-image-1.
The image generation model to use. Default: gpt-image-1.
output_format?: "png" | "webp" | "jpeg"The output format of the generated image. One of png, webp, or
jpeg. Default: png.
The output format of the generated image. One of png, webp, or
jpeg. Default: png.
Number of partial images to generate in streaming mode, from 0 (default value) to 3.
FunctionShellTool { type, environment } A tool that allows the model to execute shell commands.
A tool that allows the model to execute shell commands.
environment?: ContainerAuto { type, file_ids, memory_limit, 2 more } | LocalEnvironment { type, skills } | ContainerReference { container_id, type } | null
ContainerAuto { type, file_ids, memory_limit, 2 more }
network_policy?: ContainerNetworkPolicyDisabled { type } | ContainerNetworkPolicyAllowlist { allowed_domains, type, domain_secrets } Network access policy for the container.
Network access policy for the container.
skills?: Array<SkillReference { skill_id, type, version } | InlineSkill { description, name, source, type } >An optional list of skills referenced by id or inline data.
An optional list of skills referenced by id or inline data.
CustomTool { name, type, defer_loading, 2 more } A custom tool that processes input using a specified format. Learn more about custom tools
A custom tool that processes input using a specified format. Learn more about custom tools
NamespaceTool { description, name, tools, type } Groups function/custom tools under a shared namespace.
Groups function/custom tools under a shared namespace.
tools: Array<Function { name, type, defer_loading, 3 more } | CustomTool { name, type, defer_loading, 2 more } >The function/custom tools available inside this namespace.
The function/custom tools available inside this namespace.
CustomTool { name, type, defer_loading, 2 more } A custom tool that processes input using a specified format. Learn more about custom tools
A custom tool that processes input using a specified format. Learn more about custom tools
ToolSearchTool { type, description, execution, parameters } Hosted or BYOT tool search configuration for deferred tools.
Hosted or BYOT tool search configuration for deferred tools.
WebSearchPreviewTool { type, search_content_types, search_context_size, user_location } This tool searches the web for relevant results to use in a response. Learn more about the web search tool.
This tool searches the web for relevant results to use in a response. Learn more about the web search tool.
type: "web_search_preview" | "web_search_preview_2025_03_11"The type of the web search tool. One of web_search_preview or web_search_preview_2025_03_11.
The type of the web search tool. One of web_search_preview or web_search_preview_2025_03_11.
search_context_size?: "low" | "medium" | "high"High level guidance for the amount of context window space to use for the search. One of low, medium, or high. medium is the default.
High level guidance for the amount of context window space to use for the search. One of low, medium, or high. medium is the default.
user_location?: UserLocation | nullThe user's location.
The user's location.
The two-letter ISO country code of the user, e.g. US.
The IANA timezone of the user, e.g. America/Los_Angeles.
The unique ID of the tool search call generated by the model.
ResponseReasoningItem { id, summary, type, 3 more } A description of the chain of thought used by a reasoning model while generating
a response. Be sure to include these items in your input to the Responses API
for subsequent turns of a conversation if you are manually
managing context.
A description of the chain of thought used by a reasoning model while generating
a response. Be sure to include these items in your input to the Responses API
for subsequent turns of a conversation if you are manually
managing context.
ResponseCompactionItemParam { encrypted_content, type, id } A compaction item generated by the v1/responses/compact API.
A compaction item generated by the v1/responses/compact API.
ImageGenerationCall { id, result, status, type } An image generation request made by the model.
An image generation request made by the model.
ResponseCodeInterpreterToolCall { id, code, container_id, 3 more } A tool call to run code.
A tool call to run code.
outputs: Array<Logs { logs, type } | Image { type, url } > | nullThe outputs generated by the code interpreter, such as logs or images.
Can be null if no outputs are available.
The outputs generated by the code interpreter, such as logs or images. Can be null if no outputs are available.
LocalShellCall { id, action, call_id, 2 more } A tool call to run a command on the local shell.
A tool call to run a command on the local shell.
LocalShellCallOutput { id, output, type, status } The output of a local shell tool call.
The output of a local shell tool call.
ShellCall { action, call_id, type, 3 more } A tool representing a request to execute one or more shell commands.
A tool representing a request to execute one or more shell commands.
action: Action { commands, max_output_length, timeout_ms } The shell commands and limits that describe how to run the tool call.
The shell commands and limits that describe how to run the tool call.
The unique ID of the shell tool call. Populated when this item is returned via API.
ShellCallOutput { call_id, output, type, 3 more } The streamed output items emitted by a shell tool call.
The streamed output items emitted by a shell tool call.
Captured chunks of stdout and stderr output, along with their associated outcomes.
Captured chunks of stdout and stderr output, along with their associated outcomes.
The unique ID of the shell tool call output. Populated when this item is returned via API.
ApplyPatchCall { call_id, operation, status, 2 more } A tool call representing a request to create, delete, or update files using diff patches.
A tool call representing a request to create, delete, or update files using diff patches.
The unique ID of the apply patch tool call generated by the model.
operation: CreateFile { diff, path, type } | DeleteFile { path, type } | UpdateFile { diff, path, type } The specific create, delete, or update instruction for the apply_patch tool call.
The specific create, delete, or update instruction for the apply_patch tool call.
ApplyPatchCallOutput { call_id, status, type, 2 more } The streamed output emitted by an apply patch tool call.
The streamed output emitted by an apply patch tool call.
The unique ID of the apply patch tool call generated by the model.
status: "completed" | "failed"The status of the apply patch tool call output. One of completed or failed.
The status of the apply patch tool call output. One of completed or failed.
McpListTools { id, server_label, tools, 2 more } A list of tools available on an MCP server.
A list of tools available on an MCP server.
McpApprovalRequest { id, arguments, name, 2 more } A request for human approval of a tool invocation.
A request for human approval of a tool invocation.
McpApprovalResponse { approval_request_id, approve, type, 2 more } A response to an MCP approval request.
A response to an MCP approval request.
McpCall { id, arguments, name, 6 more } An invocation of a tool on an MCP server.
An invocation of a tool on an MCP server.
ResponseCustomToolCallOutput { call_id, output, type, id } The output of a custom tool call from your code, being sent back to the model.
The output of a custom tool call from your code, being sent back to the model.
output: string | Array<ResponseInputText { text, type } | ResponseInputImage { detail, type, file_id, image_url } | ResponseInputFile { type, file_data, file_id, 2 more } >The output from the custom tool call generated by your code.
Can be a string or an list of output content.
The output from the custom tool call generated by your code. Can be a string or an list of output content.
Array<ResponseInputText { text, type } | ResponseInputImage { detail, type, file_id, image_url } | ResponseInputFile { type, file_data, file_id, 2 more } >
ResponseInputImage { detail, type, file_id, image_url } An image input to the model. Learn about image inputs.
An image input to the model. Learn about image inputs.
A system (or developer) message inserted into the model's context.
When used along with previous_response_id, the instructions from a previous response will not be carried over to the next response. This makes it simple to swap out system (or developer) messages in new responses.
The unique ID of the previous response to the model. Use this to create multi-turn conversations. Learn more about conversation state. Cannot be used in conjunction with conversation.
ReturnsExpand Collapse
CompactedResponse { id, created_at, object, 2 more }
The compacted list of output items. This is a list of all user messages, followed by a single compaction item.
The compacted list of output items. This is a list of all user messages, followed by a single compaction item.
ResponseOutputMessage { id, content, role, 3 more } An output message from the model.
An output message from the model.
content: Array<ResponseOutputText { annotations, text, type, logprobs } | ResponseOutputRefusal { refusal, type } >The content of the output message.
The content of the output message.
ResponseOutputText { annotations, text, type, logprobs } A text output from the model.
A text output from the model.
annotations: Array<FileCitation { file_id, filename, index, type } | URLCitation { end_index, start_index, title, 2 more } | ContainerFileCitation { container_id, end_index, file_id, 3 more } | FilePath { file_id, index, type } >The annotations of the text output.
The annotations of the text output.
URLCitation { end_index, start_index, title, 2 more } A citation for a web resource used to generate a model response.
A citation for a web resource used to generate a model response.
status: "in_progress" | "completed" | "incomplete"The status of the message input. One of in_progress, completed, or
incomplete. Populated when input items are returned via API.
The status of the message input. One of in_progress, completed, or
incomplete. Populated when input items are returned via API.
phase?: "commentary" | "final_answer" | nullLabels an assistant message as intermediate commentary (commentary) or the final answer (final_answer).
For models like gpt-5.3-codex and beyond, when sending follow-up requests, preserve and resend
phase on all assistant messages — dropping it can degrade performance. Not used for user messages.
Labels an assistant message as intermediate commentary (commentary) or the final answer (final_answer).
For models like gpt-5.3-codex and beyond, when sending follow-up requests, preserve and resend
phase on all assistant messages — dropping it can degrade performance. Not used for user messages.
ResponseFileSearchToolCall { id, queries, status, 2 more } The results of a file search tool call. See the
file search guide for more information.
The results of a file search tool call. See the file search guide for more information.
status: "in_progress" | "searching" | "completed" | 2 moreThe status of the file search tool call. One of in_progress,
searching, incomplete or failed,
The status of the file search tool call. One of in_progress,
searching, incomplete or failed,
results?: Array<Result> | nullThe results of the file search tool call.
The results of the file search tool call.
attributes?: Record<string, string | number | boolean> | nullSet of 16 key-value pairs that can be attached to an object. This can be
useful for storing additional information about the object in a structured
format, and querying for objects via API or the dashboard. Keys are strings
with a maximum length of 64 characters. Values are strings with a maximum
length of 512 characters, booleans, or numbers.
Set of 16 key-value pairs that can be attached to an object. This can be useful for storing additional information about the object in a structured format, and querying for objects via API or the dashboard. Keys are strings with a maximum length of 64 characters. Values are strings with a maximum length of 512 characters, booleans, or numbers.
ResponseFunctionToolCall { arguments, call_id, name, 4 more } A tool call to run a function. See the
function calling guide for more information.
A tool call to run a function. See the function calling guide for more information.
ResponseFunctionToolCallOutputItem { id, call_id, output, 3 more }
output: string | Array<ResponseInputText { text, type } | ResponseInputImage { detail, type, file_id, image_url } | ResponseInputFile { type, file_data, file_id, 2 more } >The output from the function call generated by your code.
Can be a string or an list of output content.
The output from the function call generated by your code. Can be a string or an list of output content.
Array<ResponseInputText { text, type } | ResponseInputImage { detail, type, file_id, image_url } | ResponseInputFile { type, file_data, file_id, 2 more } >
ResponseInputImage { detail, type, file_id, image_url } An image input to the model. Learn about image inputs.
An image input to the model. Learn about image inputs.
ResponseFunctionWebSearch { id, action, status, type } The results of a web search tool call. See the
web search guide for more information.
The results of a web search tool call. See the web search guide for more information.
action: Search { query, type, queries, sources } | OpenPage { type, url } | FindInPage { pattern, type, url } An object describing the specific action taken in this web search call.
Includes details on how the model used the web (search, open_page, find_in_page).
An object describing the specific action taken in this web search call. Includes details on how the model used the web (search, open_page, find_in_page).
ResponseComputerToolCall { id, call_id, pending_safety_checks, 4 more } A tool call to a computer use tool. See the
computer use guide for more information.
A tool call to a computer use tool. See the computer use guide for more information.
status: "in_progress" | "completed" | "incomplete"The status of the item. One of in_progress, completed, or
incomplete. Populated when items are returned via API.
The status of the item. One of in_progress, completed, or
incomplete. Populated when items are returned via API.
action?: Click { button, type, x, 2 more } | DoubleClick { keys, type, x, y } | Drag { path, type, keys } | 6 moreA click action.
A click action.
Click { button, type, x, 2 more } A click action.
A click action.
DoubleClick { keys, type, x, y } A double click action.
A double click action.
Drag { path, type, keys } A drag action.
A drag action.
Flattened batched actions for computer_use. Each action includes an
type discriminator and action-specific fields.
Flattened batched actions for computer_use. Each action includes an
type discriminator and action-specific fields.
Click { button, type, x, 2 more } A click action.
A click action.
DoubleClick { keys, type, x, y } A double click action.
A double click action.
Drag { path, type, keys } A drag action.
A drag action.
ResponseComputerToolCallOutputItem { id, call_id, output, 4 more }
status: "completed" | "incomplete" | "failed" | "in_progress"The status of the message input. One of in_progress, completed, or
incomplete. Populated when input items are returned via API.
The status of the message input. One of in_progress, completed, or
incomplete. Populated when input items are returned via API.
ResponseReasoningItem { id, summary, type, 3 more } A description of the chain of thought used by a reasoning model while generating
a response. Be sure to include these items in your input to the Responses API
for subsequent turns of a conversation if you are manually
managing context.
A description of the chain of thought used by a reasoning model while generating
a response. Be sure to include these items in your input to the Responses API
for subsequent turns of a conversation if you are manually
managing context.
ResponseToolSearchCall { id, arguments, call_id, 4 more }
ResponseToolSearchOutputItem { id, call_id, execution, 4 more }
status: "in_progress" | "completed" | "incomplete"The status of the tool search output item that was recorded.
The status of the tool search output item that was recorded.
The loaded tool definitions returned by tool search.
The loaded tool definitions returned by tool search.
FunctionTool { name, parameters, strict, 3 more } Defines a function in your own code the model can choose to call. Learn more about function calling.
Defines a function in your own code the model can choose to call. Learn more about function calling.
FileSearchTool { type, vector_store_ids, filters, 2 more } A tool that searches for relevant content from uploaded files. Learn more about the file search tool.
A tool that searches for relevant content from uploaded files. Learn more about the file search tool.
A filter to apply.
A filter to apply.
ComparisonFilter { key, type, value } A filter used to compare a specified attribute key to a given value using a defined comparison operation.
A filter used to compare a specified attribute key to a given value using a defined comparison operation.
CompoundFilter { filters, type } Combine multiple filters using and or or.
Combine multiple filters using and or or.
Array of filters to combine. Items can be ComparisonFilter or CompoundFilter.
Array of filters to combine. Items can be ComparisonFilter or CompoundFilter.
ComparisonFilter { key, type, value } A filter used to compare a specified attribute key to a given value using a defined comparison operation.
A filter used to compare a specified attribute key to a given value using a defined comparison operation.
The maximum number of results to return. This number should be between 1 and 50 inclusive.
ranking_options?: RankingOptions { hybrid_search, ranker, score_threshold } Ranking options for search.
Ranking options for search.
ComputerTool { type } A tool that controls a virtual computer. Learn more about the computer tool.
A tool that controls a virtual computer. Learn more about the computer tool.
ComputerUsePreviewTool { display_height, display_width, environment, type } A tool that controls a virtual computer. Learn more about the computer tool.
A tool that controls a virtual computer. Learn more about the computer tool.
WebSearchTool { type, filters, search_context_size, user_location } Search the Internet for sources related to the prompt. Learn more about the
web search tool.
Search the Internet for sources related to the prompt. Learn more about the web search tool.
type: "web_search" | "web_search_2025_08_26"The type of the web search tool. One of web_search or web_search_2025_08_26.
The type of the web search tool. One of web_search or web_search_2025_08_26.
search_context_size?: "low" | "medium" | "high"High level guidance for the amount of context window space to use for the search. One of low, medium, or high. medium is the default.
High level guidance for the amount of context window space to use for the search. One of low, medium, or high. medium is the default.
user_location?: UserLocation | nullThe approximate location of the user.
The approximate location of the user.
The two-letter ISO country code of the user, e.g. US.
The IANA timezone of the user, e.g. America/Los_Angeles.
Mcp { server_label, type, allowed_tools, 7 more } Give the model access to additional tools via remote Model Context Protocol
(MCP) servers. Learn more about MCP.
Give the model access to additional tools via remote Model Context Protocol (MCP) servers. Learn more about MCP.
allowed_tools?: Array<string> | McpToolFilter { read_only, tool_names } | nullList of allowed tool names or a filter object.
List of allowed tool names or a filter object.
McpToolFilter { read_only, tool_names } A filter object to specify which tools are allowed.
A filter object to specify which tools are allowed.
Indicates whether or not a tool modifies data or is read-only. If an
MCP server is annotated with readOnlyHint,
it will match this filter.
An OAuth access token that can be used with a remote MCP server, either with a custom MCP server URL or a service connector. Your application must handle the OAuth authorization flow and provide the token here.
connector_id?: "connector_dropbox" | "connector_gmail" | "connector_googlecalendar" | 5 moreIdentifier for service connectors, like those available in ChatGPT. One of
server_url or connector_id must be provided. Learn more about service
connectors here.
Currently supported connector_id values are:
- Dropbox:
connector_dropbox
- Gmail:
connector_gmail
- Google Calendar:
connector_googlecalendar
- Google Drive:
connector_googledrive
- Microsoft Teams:
connector_microsoftteams
- Outlook Calendar:
connector_outlookcalendar
- Outlook Email:
connector_outlookemail
- SharePoint:
connector_sharepoint
Identifier for service connectors, like those available in ChatGPT. One of
server_url or connector_id must be provided. Learn more about service
connectors here.
Currently supported connector_id values are:
- Dropbox:
connector_dropbox - Gmail:
connector_gmail - Google Calendar:
connector_googlecalendar - Google Drive:
connector_googledrive - Microsoft Teams:
connector_microsoftteams - Outlook Calendar:
connector_outlookcalendar - Outlook Email:
connector_outlookemail - SharePoint:
connector_sharepoint
Optional HTTP headers to send to the MCP server. Use for authentication or other purposes.
require_approval?: McpToolApprovalFilter { always, never } | "always" | "never" | nullSpecify which of the MCP server's tools require approval.
Specify which of the MCP server's tools require approval.
McpToolApprovalFilter { always, never } Specify which of the MCP server's tools require approval. Can be
always, never, or a filter object associated with tools
that require approval.
Specify which of the MCP server's tools require approval. Can be
always, never, or a filter object associated with tools
that require approval.
always?: Always { read_only, tool_names } A filter object to specify which tools are allowed.
A filter object to specify which tools are allowed.
Indicates whether or not a tool modifies data or is read-only. If an
MCP server is annotated with readOnlyHint,
it will match this filter.
never?: Never { read_only, tool_names } A filter object to specify which tools are allowed.
A filter object to specify which tools are allowed.
Indicates whether or not a tool modifies data or is read-only. If an
MCP server is annotated with readOnlyHint,
it will match this filter.
CodeInterpreter { container, type } A tool that runs Python code to help generate a response to a prompt.
A tool that runs Python code to help generate a response to a prompt.
container: string | CodeInterpreterToolAuto { type, file_ids, memory_limit, network_policy } The code interpreter container. Can be a container ID or an object that
specifies uploaded file IDs to make available to your code, along with an
optional memory_limit setting.
The code interpreter container. Can be a container ID or an object that
specifies uploaded file IDs to make available to your code, along with an
optional memory_limit setting.
CodeInterpreterToolAuto { type, file_ids, memory_limit, network_policy } Configuration for a code interpreter container. Optionally specify the IDs of the files to run the code on.
Configuration for a code interpreter container. Optionally specify the IDs of the files to run the code on.
memory_limit?: "1g" | "4g" | "16g" | "64g" | nullThe memory limit for the code interpreter container.
The memory limit for the code interpreter container.
network_policy?: ContainerNetworkPolicyDisabled { type } | ContainerNetworkPolicyAllowlist { allowed_domains, type, domain_secrets } Network access policy for the container.
Network access policy for the container.
ImageGeneration { type, action, background, 9 more } A tool that generates images using the GPT image models.
A tool that generates images using the GPT image models.
action?: "generate" | "edit" | "auto"Whether to generate a new image or edit an existing image. Default: auto.
Whether to generate a new image or edit an existing image. Default: auto.
background?: "transparent" | "opaque" | "auto"Background type for the generated image. One of transparent,
opaque, or auto. Default: auto.
Background type for the generated image. One of transparent,
opaque, or auto. Default: auto.
input_fidelity?: "high" | "low" | nullControl how much effort the model will exert to match the style and features, especially facial features, of input images. This parameter is only supported for gpt-image-1 and gpt-image-1.5 and later models, unsupported for gpt-image-1-mini. Supports high and low. Defaults to low.
Control how much effort the model will exert to match the style and features, especially facial features, of input images. This parameter is only supported for gpt-image-1 and gpt-image-1.5 and later models, unsupported for gpt-image-1-mini. Supports high and low. Defaults to low.
input_image_mask?: InputImageMask { file_id, image_url } Optional mask for inpainting. Contains image_url
(string, optional) and file_id (string, optional).
Optional mask for inpainting. Contains image_url
(string, optional) and file_id (string, optional).
model?: (string & {}) | "gpt-image-1" | "gpt-image-1-mini" | "gpt-image-1.5"The image generation model to use. Default: gpt-image-1.
The image generation model to use. Default: gpt-image-1.
output_format?: "png" | "webp" | "jpeg"The output format of the generated image. One of png, webp, or
jpeg. Default: png.
The output format of the generated image. One of png, webp, or
jpeg. Default: png.
Number of partial images to generate in streaming mode, from 0 (default value) to 3.
FunctionShellTool { type, environment } A tool that allows the model to execute shell commands.
A tool that allows the model to execute shell commands.
environment?: ContainerAuto { type, file_ids, memory_limit, 2 more } | LocalEnvironment { type, skills } | ContainerReference { container_id, type } | null
ContainerAuto { type, file_ids, memory_limit, 2 more }
network_policy?: ContainerNetworkPolicyDisabled { type } | ContainerNetworkPolicyAllowlist { allowed_domains, type, domain_secrets } Network access policy for the container.
Network access policy for the container.
skills?: Array<SkillReference { skill_id, type, version } | InlineSkill { description, name, source, type } >An optional list of skills referenced by id or inline data.
An optional list of skills referenced by id or inline data.
CustomTool { name, type, defer_loading, 2 more } A custom tool that processes input using a specified format. Learn more about custom tools
A custom tool that processes input using a specified format. Learn more about custom tools
NamespaceTool { description, name, tools, type } Groups function/custom tools under a shared namespace.
Groups function/custom tools under a shared namespace.
tools: Array<Function { name, type, defer_loading, 3 more } | CustomTool { name, type, defer_loading, 2 more } >The function/custom tools available inside this namespace.
The function/custom tools available inside this namespace.
CustomTool { name, type, defer_loading, 2 more } A custom tool that processes input using a specified format. Learn more about custom tools
A custom tool that processes input using a specified format. Learn more about custom tools
ToolSearchTool { type, description, execution, parameters } Hosted or BYOT tool search configuration for deferred tools.
Hosted or BYOT tool search configuration for deferred tools.
WebSearchPreviewTool { type, search_content_types, search_context_size, user_location } This tool searches the web for relevant results to use in a response. Learn more about the web search tool.
This tool searches the web for relevant results to use in a response. Learn more about the web search tool.
type: "web_search_preview" | "web_search_preview_2025_03_11"The type of the web search tool. One of web_search_preview or web_search_preview_2025_03_11.
The type of the web search tool. One of web_search_preview or web_search_preview_2025_03_11.
search_context_size?: "low" | "medium" | "high"High level guidance for the amount of context window space to use for the search. One of low, medium, or high. medium is the default.
High level guidance for the amount of context window space to use for the search. One of low, medium, or high. medium is the default.
user_location?: UserLocation | nullThe user's location.
The user's location.
The two-letter ISO country code of the user, e.g. US.
The IANA timezone of the user, e.g. America/Los_Angeles.
ResponseCompactionItem { id, encrypted_content, type, created_by } A compaction item generated by the v1/responses/compact API.
A compaction item generated by the v1/responses/compact API.
ImageGenerationCall { id, result, status, type } An image generation request made by the model.
An image generation request made by the model.
ResponseCodeInterpreterToolCall { id, code, container_id, 3 more } A tool call to run code.
A tool call to run code.
outputs: Array<Logs { logs, type } | Image { type, url } > | nullThe outputs generated by the code interpreter, such as logs or images.
Can be null if no outputs are available.
The outputs generated by the code interpreter, such as logs or images. Can be null if no outputs are available.
LocalShellCall { id, action, call_id, 2 more } A tool call to run a command on the local shell.
A tool call to run a command on the local shell.
LocalShellCallOutput { id, output, type, status } The output of a local shell tool call.
The output of a local shell tool call.
ResponseFunctionShellToolCall { id, action, call_id, 4 more } A tool call that executes one or more shell commands in a managed environment.
A tool call that executes one or more shell commands in a managed environment.
action: Action { commands, max_output_length, timeout_ms } The shell commands and limits that describe how to run the tool call.
The shell commands and limits that describe how to run the tool call.
environment: ResponseLocalEnvironment { type } | ResponseContainerReference { container_id, type } | nullRepresents the use of a local environment to perform shell actions.
Represents the use of a local environment to perform shell actions.
ResponseFunctionShellToolCallOutput { id, call_id, max_output_length, 4 more } The output of a shell tool call that was emitted.
The output of a shell tool call that was emitted.
The maximum length of the shell command output. This is generated by the model and should be passed back with the raw output.
output: Array<Output>An array of shell call output contents
An array of shell call output contents
ResponseApplyPatchToolCall { id, call_id, operation, 3 more } A tool call that applies file diffs by creating, deleting, or updating files.
A tool call that applies file diffs by creating, deleting, or updating files.
operation: CreateFile { diff, path, type } | DeleteFile { path, type } | UpdateFile { diff, path, type } One of the create_file, delete_file, or update_file operations applied via apply_patch.
One of the create_file, delete_file, or update_file operations applied via apply_patch.
ResponseApplyPatchToolCallOutput { id, call_id, status, 3 more } The output emitted by an apply patch tool call.
The output emitted by an apply patch tool call.
McpCall { id, arguments, name, 6 more } An invocation of a tool on an MCP server.
An invocation of a tool on an MCP server.
McpListTools { id, server_label, tools, 2 more } A list of tools available on an MCP server.
A list of tools available on an MCP server.
McpApprovalRequest { id, arguments, name, 2 more } A request for human approval of a tool invocation.
A request for human approval of a tool invocation.
McpApprovalResponse { id, approval_request_id, approve, 2 more } A response to an MCP approval request.
A response to an MCP approval request.
ResponseCustomToolCall { call_id, input, name, 3 more } A call to a custom tool created by the model.
A call to a custom tool created by the model.
ResponseCustomToolCallOutputItem extends ResponseCustomToolCallOutput { call_id, output, type, id } { id, status, created_by } The output of a custom tool call from your code, being sent back to the model.
The output of a custom tool call from your code, being sent back to the model.
Token accounting for the compaction pass, including cached, reasoning, and total tokens.
Token accounting for the compaction pass, including cached, reasoning, and total tokens.
input_tokens_details: InputTokensDetails { cached_tokens } A detailed breakdown of the input tokens.
A detailed breakdown of the input tokens.
The number of tokens that were retrieved from the cache. More on prompt caching.
Compact a response
import OpenAI from "openai";
const openai = new OpenAI();
// Compact the previous response if you are running out of tokens
const compactedResponse = await openai.responses.compact({
model: "gpt-5.1-codex-max",
input: [
{
role: "user",
content: "Create a simple landing page for a dog petting café.",
},
// All items returned from previous requests are included here, like reasoning, message, function call, etc.
{
id: "msg_030d085c0b53e67e0069332e3a72d4819c96c6f2c4adc15d33",
type: "message",
status: "completed",
content: [
{
type: "output_text",
annotations: [],
logprobs: [],
text: "Below is a single file, ready-to-use landing page for a dog petting café:...",
},
],
role: "assistant",
},
],
});
// Pass the compactedResponse.output as input to the next request
console.log(compactedResponse);
{
"id": "resp_001",
"object": "response.compaction",
"created_at": 1764967971,
"output": [
{
"id": "msg_000",
"type": "message",
"status": "completed",
"content": [
{
"type": "input_text",
"text": "Create a simple landing page for a dog petting cafe."
}
],
"role": "user"
},
{
"id": "cmp_001",
"type": "compaction",
"encrypted_content": "gAAAAABpM0Yj-...="
}
],
"usage": {
"input_tokens": 139,
"input_tokens_details": {
"cached_tokens": 0
},
"output_tokens": 438,
"output_tokens_details": {
"reasoning_tokens": 64
},
"total_tokens": 577
}
}
Returns Examples
{
"id": "resp_001",
"object": "response.compaction",
"created_at": 1764967971,
"output": [
{
"id": "msg_000",
"type": "message",
"status": "completed",
"content": [
{
"type": "input_text",
"text": "Create a simple landing page for a dog petting cafe."
}
],
"role": "user"
},
{
"id": "cmp_001",
"type": "compaction",
"encrypted_content": "gAAAAABpM0Yj-...="
}
],
"usage": {
"input_tokens": 139,
"input_tokens_details": {
"cached_tokens": 0
},
"output_tokens": 438,
"output_tokens_details": {
"reasoning_tokens": 64
},
"total_tokens": 577
}
}