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class AllModels: A class that can be one of several variants.union
enum ChatModel:
class ComparisonFilter:

A filter used to compare a specified attribute key to a given value using a defined comparison operation.

class CompoundFilter:

Combine multiple filters using and or or.

class CustomToolInputFormat: A class that can be one of several variants.union

The input format for the custom tool. Default is unconstrained text.

class ErrorObject:
class FunctionDefinition:
class FunctionParameters:

The parameters the functions accepts, described as a JSON Schema object. See the guide for examples, and the JSON Schema reference for documentation about the format.

Omitting parameters defines a function with an empty parameter list.

enum OAuthErrorCode:
class Reasoning:

gpt-5 and o-series models only

Configuration options for reasoning models.

enum ReasoningEffort:

Constrains effort on reasoning for reasoning models. Currently supported values are none, minimal, low, medium, high, xhigh, and max. Reducing reasoning effort can result in faster responses and fewer tokens used on reasoning in a response. Not all reasoning models support every value. See the reasoning guide for model-specific support.

class ResponseFormatJsonObject:

JSON object response format. An older method of generating JSON responses. Using json_schema is recommended for models that support it. Note that the model will not generate JSON without a system or user message instructing it to do so.

class ResponseFormatJsonSchema:

JSON Schema response format. Used to generate structured JSON responses. Learn more about Structured Outputs.

class ResponseFormatText:

Default response format. Used to generate text responses.

class ResponseFormatTextGrammar:

A custom grammar for the model to follow when generating text. Learn more in the custom grammars guide.

class ResponseFormatTextPython:

Configure the model to generate valid Python code. See the custom grammars guide for more details.

class ResponsesModel: A class that can be one of several variants.union