Vision

Send images with the standard image_url content part, either as an HTTPS URL or a base64 data URL:

curl https://api.vichar.io/v1/chat/completions \
  -H "Authorization: Bearer $VICHAR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "vichar-sonnet-5.5",
    "messages": [{
      "role": "user",
      "content": [
        {"type": "text", "text": "What is in this image?"},
        {"type": "image_url", "image_url": {"url": "https://example.com/photo.png"}}
      ]
    }]
  }'

Only some models accept image input. To find them, list the catalogue and look for vision support in the model's capability flags, or filter vichar.io/models. The Vichar catalogue is text out; image input only.