Docs

`messages[].content` can be a string or an array of parts. Use `image_url` for images (https or `data:` base64).

Vision

messages[].content can be a string or an array of parts. Use image_url for images (https or data: base64).

bash
curl http://localhost:3001/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-4o",
    "messages": [{
      "role": "user",
      "content": [
        { "type": "text", "text": "What is in this image?" },
        { "type": "image_url", "image_url": { "url": "https://example.com/photo.jpg" } }
      ]
    }]
  }'

OpenAI-compatible providers receive the parts unchanged. Anthropic and Gemini convert them to their native image blocks. Video and audio parts are not in this wave.

Structured outputs

Streaming