> ## Documentation Index
> Fetch the complete documentation index at: https://docs.neosantara.xyz/llms.txt
> Use this file to discover all available pages before exploring further.

# Anthropic Vision

> Send multimodal images to Claude models using Base64 source blocks and URLs.

The `/anthropic/v1/messages` endpoint supports document and visual processing using standard [Anthropic](https://www.anthropic.com/?utm_source=neosantara-docs\&utm_medium=referral) image content blocks.

<CodeGroup>
  ```python Python (Anthropic SDK - Base64) icon="python" theme={"theme":{"light":"ayu-dark","dark":"catppuccin-latte"}}
  from anthropic import Anthropic
  import base64
  import os

  client = Anthropic(
      base_url="https://api.neosantara.xyz/anthropic",
      api_key=os.environ["NEOSANTARA_API_KEY"]
  )

  with open("architecture_diagram.png", "rb") as img_file:
      image_data = base64.b64encode(img_file.read()).decode("utf-8")

  response = client.messages.create(
      model="claude-sonnet-4-6",
      max_tokens=1024,
      messages=[
          {
              "role": "user",
              "content": [
                  {
                      "type": "image",
                      "source": {
                          "type": "base64",
                          "media_type": "image/png",
                          "data": image_data
                      }
                  },
                  {
                      "type": "text",
                      "text": "Explain data flow between system components in this diagram."
                  }
              ]
          }
      ]
  )

  print(response.content[0].text)
  ```

  ```bash cURL icon="terminal" theme={"theme":{"light":"ayu-dark","dark":"catppuccin-latte"}}
  curl -X POST https://api.neosantara.xyz/anthropic/v1/messages \
    -H "x-api-key: $NEOSANTARA_API_KEY" \
    -H "anthropic-version: 2023-06-01" \
    -H "Content-Type: application/json" \
    -d '{
      "model": "claude-sonnet-4-6",
      "max_tokens": 1024,
      "messages": [
        {
          "role": "user",
          "content": [
            {
              "type": "image",
              "source": {
                "type": "url",
                "url": "https://images.unsplash.com/photo-1551288049-bebda4e38f71"
              }
            },
            {
              "type": "text",
              "text": "Analyze this chart."
            }
          ]
        }
      ]
    }'
  ```
</CodeGroup>

## Supported Media Types

* `image/jpeg`
* `image/png`
* `image/gif`
* `image/webp`

Maximum file size is 20 MB per image.

## Next Steps

| Task              | Guide                                                        |
| :---------------- | :----------------------------------------------------------- |
| OpenAI Vision     | [OpenAI Vision](/en/gateway/chat-completions/vision)         |
| Document OCR      | [Document OCR](/en/gateway/capabilities/ocr)                 |
| Extended Thinking | [Extended Thinking](/en/gateway/anthropic-messages/thinking) |


## Related topics

- [Anthropic Messages API](/en/gateway/anthropic-messages.md)
- [Multimodal Vision](/en/gateway/chat-completions/vision.md)
- [Document OCR](/en/gateway/capabilities/ocr.md)