API Reference

Chat

Completions

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List Chat Completions

client.Chat.Completions.List(ctx, query) (*CursorPage[ChatCompletion], error)

GET/chat/completions

List stored Chat Completions. Only Chat Completions that have been stored with the store parameter set to true will be returned.

ParametersExpand Collapse

query ChatCompletionListParams

After param.Field[string]Optional

Identifier for the last chat completion from the previous pagination request.

Limit param.Field[int64]Optional

Number of Chat Completions to retrieve.

Metadata param.Field[Metadata]Optional

A list of metadata keys to filter the Chat Completions by. Example:

metadata[key1]=value1&metadata[key2]=value2

Model param.Field[string]Optional

The model used to generate the Chat Completions.

Order param.Field[ChatCompletionListParamsOrder]Optional

Sort order for Chat Completions by timestamp. Use asc for ascending order or desc for descending order. Defaults to asc.

ReturnsExpand Collapse

type ChatCompletion struct{…}

Represents a chat completion response returned by model, based on the provided input.

ID string

A unique identifier for the chat completion.

Choices []ChatCompletionChoice

A list of chat completion choices. Can be more than one if n is greater than 1.

Created int64

The Unix timestamp (in seconds) of when the chat completion was created.

formatunixtime

Model string

The model used for the chat completion.

Object ChatCompletion

The object type, which is always chat.completion.

Metadata MetadataOptional

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.

Moderation ChatCompletionModerationOptional

Moderation results for the request input and generated output, if moderated completions were requested.

ServiceTier ChatCompletionServiceTierOptional

Specifies the processing type used for serving the request.

• If set to ‘auto’, then the request will be processed with the service tier configured in the Project settings. Unless otherwise configured, the Project will use ‘default’.
• If set to ‘default’, then the request will be processed with the standard pricing and performance for the selected model.
• If set to ‘flex’, then the request will be processed with the Flex Processing service tier.
• To opt-in to Fast mode at the request level, include the service_tier=fast or service_tier=priority parameter for Responses or Chat Completions. The response will show service_tier=priority regardless of if you specify service_tier=fast or priority in your request.
• When not set, the default behavior is ‘auto’.

When the service_tier parameter is set, the response body will include the service_tier value based on the processing mode actually used to serve the request. This response value may be different from the value set in the parameter.

DeprecatedSystemFingerprint stringOptional

This fingerprint represents the backend configuration that the model runs with.

Can be used in conjunction with the seed request parameter to understand when backend changes have been made that might impact determinism.

Usage CompletionUsageOptional

Usage statistics for the completion request.

List Chat Completions

Go

HTTP

Python

TypeScript

Go

Ruby

Java

CLI Tool

package main

import (
  "context"
  "fmt"

  "github.com/openai/openai-go"
  "github.com/openai/openai-go/option"
)

func main() {
  client := openai.NewClient(
    option.WithAPIKey("My API Key"),
  )
  page, err := client.Chat.Completions.List(context.TODO(), openai.ChatCompletionListParams{

  })
  if err != nil {
    panic(err.Error())
  }
  fmt.Printf("%+v\n", page)
}

{
  "object": "list",
  "data": [
    {
      "object": "chat.completion",
      "id": "chatcmpl-AyPNinnUqUDYo9SAdA52NobMflmj2",
      "model": "gpt-5.4",
      "created": 1738960610,
      "request_id": "req_ded8ab984ec4bf840f37566c1011c417",
      "tool_choice": null,
      "usage": {
        "total_tokens": 31,
        "completion_tokens": 18,
        "prompt_tokens": 13
      },
      "seed": 4944116822809979520,
      "top_p": 1.0,
      "temperature": 1.0,
      "presence_penalty": 0.0,
      "frequency_penalty": 0.0,
      "system_fingerprint": "fp_50cad350e4",
      "input_user": null,
      "service_tier": "default",
      "tools": null,
      "metadata": {},
      "choices": [
        {
          "index": 0,
          "message": {
            "content": "Mind of circuits hum,  \nLearning patterns in silence—  \nFuture's quiet spark.",
            "role": "assistant",
            "tool_calls": null,
            "function_call": null
          },
          "finish_reason": "stop",
          "logprobs": null
        }
      ],
      "response_format": null
    }
  ],
  "first_id": "chatcmpl-AyPNinnUqUDYo9SAdA52NobMflmj2",
  "last_id": "chatcmpl-AyPNinnUqUDYo9SAdA52NobMflmj2",
  "has_more": false
}

Returns Examples

{
  "object": "list",
  "data": [
    {
      "object": "chat.completion",
      "id": "chatcmpl-AyPNinnUqUDYo9SAdA52NobMflmj2",
      "model": "gpt-5.4",
      "created": 1738960610,
      "request_id": "req_ded8ab984ec4bf840f37566c1011c417",
      "tool_choice": null,
      "usage": {
        "total_tokens": 31,
        "completion_tokens": 18,
        "prompt_tokens": 13
      },
      "seed": 4944116822809979520,
      "top_p": 1.0,
      "temperature": 1.0,
      "presence_penalty": 0.0,
      "frequency_penalty": 0.0,
      "system_fingerprint": "fp_50cad350e4",
      "input_user": null,
      "service_tier": "default",
      "tools": null,
      "metadata": {},
      "choices": [
        {
          "index": 0,
          "message": {
            "content": "Mind of circuits hum,  \nLearning patterns in silence—  \nFuture's quiet spark.",
            "role": "assistant",
            "tool_calls": null,
            "function_call": null
          },
          "finish_reason": "stop",
          "logprobs": null
        }
      ],
      "response_format": null
    }
  ],
  "first_id": "chatcmpl-AyPNinnUqUDYo9SAdA52NobMflmj2",
  "last_id": "chatcmpl-AyPNinnUqUDYo9SAdA52NobMflmj2",
  "has_more": false
}