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Vision

Vision lets supported models answer questions about images and PDFs. Use it for image understanding, screenshots, diagrams, scanned pages, and document summaries.

Mixlayer supports vision input through both Chat Completions and Responses. Use a model documented as supporting vision; text-only models return invalid_media when media is included.

Request Shapes

{
  "model": "your-vision-model",
  "messages": [
    {
      "role": "user",
      "content": [
        { "type": "text", "text": "What is in this image?" },
        {
          "type": "image_url",
          "image_url": {
            "url": "https://example.com/photo.png",
            "detail": "auto"
          }
        }
      ]
    }
  ]
}

Supported Media

Source	Supported values
Remote URL	`https://` only. Redirects are followed up to 3 hops.
Data URL	Base64 `data:` URL. Chat Completions uses it in `image_url`; Responses uses it in `image_url`, `file_data`, or `file_url`.
MIME types	`image/jpeg`, `image/png`, `image/webp`, `application/pdf`.
`detail`	Optional: `low`, `high`, `auto`, or `original`.

Limits

Limit	Default
Media parts per request	8
Bytes per media item	20 MiB
Total media bytes per request	80 MiB
HTTPS fetch timeout	10 seconds
JSON request body	160 MiB (we recommend supplying media via a remotely retrievable URL)
PDF pages processed	First 20 pages, rasterized at 150 DPI

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