Text

Text models run through chat completions or Responses-style routes.

Method	Path	Notes
`POST`	`/v1/chat/completions`	OpenAI Chat Completions shape.
`POST`	`/v1/responses`	Responses-style input, previous response IDs, and stored response records.
`POST`	`/external/v1/chat/completions`	OpenAI-compatible external route.
`POST`	`/external/v1/responses`	Responses-style external route.

Chat request

{
  "model": "gpt-5.5",
  "messages": [
    { "role": "system", "content": "Be concise." },
    { "role": "user", "content": "Write a commit summary." }
  ],
  "stream": true,
  "tools": [],
  "tool_choice": "auto"
}

The normalizer preserves common OpenAI and AI SDK fields, including stream_options, parallel_tool_calls, response_format, and reasoning fields where the selected adapter supports them.

Responses request

{
  "model": "gpt-5.5",
  "input": [
    { "role": "user", "content": "Summarize this log." }
  ],
  "stream": false
}

Responses can be retrieved by ID after creation.

Tools
Streaming
Inference API reference

Modalities Image

Overview

External Use

Families

Modalities

Guides

Chat request

Responses request

​Chat request

​Responses request

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Chat request

Responses request

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