How much does Claude Fable 5.1 cost on the API?
$10 per 1M input tokens and $50 per 1M output tokens, the same as Claude Fable 5. Cache reads are $0.25 per 1M tokens.
Anthropic · Claude Fable · Available
Claude Fable 5.1
Claude Fable 5.1 is Anthropic's successor to Claude Fable 5 for long-running agentic coding, knowledge work and research, released September 1, 2026. It has a 1M-token context window and costs $10 / $50 per 1M input/output tokens, the same as Fable 5, with cache reads cut to $0.25. In Claude Code you pick it explicitly with the `fable` alias.
· today
API price per 1M tokens
$10 in / $50 out
Context window
1M tokens
Claude Fable 5.1 specs
| Released | Sep 1, 2026 |
|---|---|
| Status | Available |
| API model ID | claude-fable-5-1 |
| API price (in / out) | $10 / $50 per 1M tokens |
| Cache read | $0.25 per 1M tokens |
| Context window | 1M tokens |
| Plans | Pro (usage credits), Max, Team premium, Enterprise |
| Platforms | Claude API, Amazon Bedrock, Claude Platform on AWS, Google Cloud, Microsoft Foundry |
Where you can use Claude Fable 5.1
Claude Fable 5.1 compared
Claude Fable 5.1 FAQ
How do I use Claude Fable 5.1 in Claude Code?
Select it with the `fable` alias, for example `/model fable`. It needs Claude Code v2.1.257 or later and is never the default, so you have to choose it.
Is Claude Fable 5.1 on the free Claude plan?
No. Claude's pricing page gives Pro access through usage credits, and lets Max and Team premium seats spend up to 50% of their weekly limits on Fable.
What is the Claude Fable 5.1 context window?
1M tokens by default, with 128k max output tokens and always-on adaptive thinking.
Other Anthropic models
Sources
- Claude Developer Platform release notesread 2026-09-24
- Claude API pricingread 2026-09-24
- Claude models overviewread 2026-09-24
- Claude Code model configurationread 2026-09-24
- Claude plans and pricingread 2026-09-24