Anthropictext

Claude Fable 5.1

Anthropic's latest Fable model for demanding reasoning, long-context analysis, and agentic workflows.

claude-fable-5-1

Quickstart

Call this model

Chat completion

curl https://inference-api.worldrouter.ai/v1/chat/completions \
  -H "Authorization: Bearer your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-fable-5-1",
    "messages": [
      {
        "role": "user",
        "content": "Hello"
      }
    ]
  }'