claude-fable-5-1ChatExamples verified 2026-09-25Claude Fable 5.1
Claude's flagship. Cached input is $0.25 / 1M tokens, 1/4 of Fable 5 — ideal for long sessions and repeated context.
- Official price
- $10 / $50/ 1M tokensInput / output
- Context window
- 1M tokens1,000,000
Notes
- Anthropic protocol only: the Base URL has no /v1, and /v1/chat/completions returns 404.
Pricing
Official price in USD. Actual charge = official price × group multiplier.
- Input
- $10 / 1M tokens
- Cached input
- $0.25 / 1M tokens
- Output
- $50 / 1M tokens
Endpoints
- POST
/v1/messages - POST
/v1/messages/count_tokens