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Claude Fable 5.1

by Anthropic · Language Models

Context 1M tokensVisionReasoning / thinking

Overview

Anthropic Claude Fable 5.1 for demanding reasoning, long-horizon agentic coding, multistep research, and complex knowledge work.

Context window1M tokens
Max output128K tokens
Input → Outputtext, images → text
CapabilitiesVision, Reasoning / thinking

Pricing

$12.95 in · $64.75 out / 1M

UsageRate (USD)Unit
Input tokens$12.95per 1M tokens
Cached input (cache hit)$0.32per 1M tokens
Output tokens$64.75per 1M tokens

TuneRouter live platform pricing · currency: USD · pre-deduction settled by actual usage

Call it in 30 seconds

OpenAI-compatible · base URL https://api.tunerouter.com/v1/

POST/chat/completions
curl https://api.tunerouter.com/v1/chat/completions \
  -H "Authorization: Bearer $TUNEROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "claude-fable-5-1", "messages": [{"role": "user", "content": "Hello!"}]}'

Model ID: claude-fable-5-1 · works with OpenAI SDKs — just point base_url at api.tunerouter.com

More from Anthropic

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