ChatGPT · Schema
ChatCompletionChoice
AgentsArtificial IntelligenceChatGPTEmbeddingsFine-TuningGPT-4GPT-5Language ModelOpenAIReal-Time
Properties
| Name | Type | Description |
|---|---|---|
| index | integer | The index of the choice in the list. |
| message | object | |
| finish_reason | string | The reason the model stopped generating tokens. stop means the model hit a natural stop point or a provided stop sequence. length means the maximum token limit was reached. tool_calls means the model |
| logprobs | object | Log probability information for the choice. |
JSON Schema
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"$id": "#/components/schemas/ChatCompletionChoice",
"title": "ChatCompletionChoice",
"type": "object",
"required": [
"index",
"message",
"finish_reason"
],
"properties": {
"index": {
"type": "integer",
"description": "The index of the choice in the list.",
"example": 10
},
"message": {
"$ref": "#/components/schemas/ChatCompletionAssistantMessage"
},
"finish_reason": {
"type": "string",
"description": "The reason the model stopped generating tokens. stop means\nthe model hit a natural stop point or a provided stop\nsequence. length means the maximum token limit was reached.\ntool_calls means the model called a tool. content_filter\nmeans content was omitted due to a flag from content filters.\n",
"enum": [
"stop",
"length",
"tool_calls",
"content_filter"
],
"nullable": true,
"example": "stop"
},
"logprobs": {
"type": "object",
"description": "Log probability information for the choice.",
"nullable": true,
"properties": {
"content": {
"type": "array",
"description": "A list of message content tokens with log probability\ninformation.\n",
"nullable": true,
"items": {
"$ref": "#/components/schemas/TokenLogprob"
}
}
},
"example": "example_value"
}
}
}
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.
Call it yourself
curl for this page
This JSON Schema
curl "https://apis.io/api/v1/json-schemas/chatgpt-chatcompletionchoice"
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 form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.
A second provider on the same verified email joins the account you already have.