OpenAI · Schema

ChatCompletionChoice

Artificial IntelligenceLarge Language ModelsT1

Properties

Name Type Description
index integer The index of the choice in the list of choices.
message object The chat completion message generated by the model.
finish_reason string The reason the model stopped generating tokens. stop means the model hit a natural stop point or provided stop sequence. length means the maximum token count was reached. tool_calls means the model ca
logprobs ['object', 'null'] Log probability information for the choice.
View JSON Schema on GitHub

JSON Schema

openai-chat-completions-chat-completion-choice-schema.json Raw ↑
{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "ChatCompletionChoice",
  "type": "object",
  "properties": {
    "index": {
      "type": "integer",
      "description": "The index of the choice in the list of choices."
    },
    "message": {
      "type": "object",
      "description": "The chat completion message generated by the model."
    },
    "finish_reason": {
      "type": "string",
      "description": "The reason the model stopped generating tokens. stop means the model hit a natural stop point or provided stop sequence. length means the maximum token count was reached. tool_calls means the model called a tool. content_filter means content was omitted due to a flag from content filters."
    },
    "logprobs": {
      "type": "['object', 'null']",
      "description": "Log probability information for the choice."
    }
  }
}

Work with this as data

Every JSON Schema here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for schemas

4 MCP tools reach this
  • find_json_schemasBrowse and filter every JSON Schema in the catalog.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools

Call it yourself

curl for this page
This JSON Schema
curl "https://apis.io/api/v1/json-schemas/openai-chat-completions-chat-completion-choice"
All schemas
curl "https://apis.io/api/v1/json-schemas?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no email required.

A second provider on the same verified email joins the account you already have.