Messages (Anthropic)

POST /v1/messages

Accepts requests in the Anthropic Messages API format and translates them to the internal OpenAI-compatible format. This allows clients using the Anthropic SDK to use ai& without code changes.

Note

This is a compatibility adapter. For full control over request parameters, use the Chat Completions or Responses endpoints directly.

Usage

from anthropic import Anthropic

client = Anthropic(
    api_key="sk-your-api-key",
    base_url="https://api.aiand.com/v1",
)

message = client.messages.create(
    model="claude-sonnet-4-20250514",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Hello!"}],
)

print(message.content[0].text)

Behavior

• The request body is translated from Anthropic format to OpenAI format internally
• The response is translated back to Anthropic format before returning
• Streaming is supported
• Authentication uses the same Authorization: Bearer header as other endpoints

Supported parameters

Standard Anthropic Messages API parameters are supported. Parameters that have no equivalent in the underlying model are silently ignored.