Reference · Snippet · json

OpenAI vision message

Last updated Jul 17, 2026

openaivisionmultimodal

{
  "model": "gpt-4o",
  "messages": [{
    "role": "user",
    "content": [
      { "type": "text", "text": "Describe this diagram." },
      { "type": "image_url", "image_url": { "url": "data:image/png;base64,..." } }
    ]
  }]
}