Skip to main content

Documentation Index

Fetch the complete documentation index at: https://docs.compose.market/llms.txt

Use this file to discover all available pages before exploring further.

Vision means image input on a text route. Pick a model whose catalog row includes image in input and text in output.

​
Chat completions

{
  "model": "gpt-5.5",
  "messages": [
    {
      "role": "user",
      "content": [
        { "type": "text", "text": "What changed in this screenshot?" },
        {
          "type": "image_url",
          "image_url": {
            "url": "data:image/png;base64,...",
            "detail": "auto"
          }
        }
      ]
    }
  ]
}

​
Legacy attachment fields

Native chat routes also normalize legacy top-level fields:
FieldMeaning
image_urlAdds an image part to the last user message.
audio_urlAdds an audio part to the last user message.
video_urlAdds a video part to the last user message.
Use content parts for new integrations. They are clearer and closer to OpenAI-compatible client behavior.