Input
$10
Output
$50
Context
1M
Claude Fable 5.1 costs $10 per million input tokens and $50 per million output tokens. Cached input is billed at $0.25 per million, 98% less than fresh input.
Specifications
| Lab | Anthropic |
| Model id | anthropic/claude-fable-5.1 |
| Input price | $10 per million tokens |
| Output price | $50 per million tokens |
| Cached input price | $0.25 per million tokens |
| Context window | 1,000,000 tokens (1M) |
| Maximum output | 128,000 tokens (128K) |
| Tool calling | yes |
| Image input | yes |
| Reasoning | yes |
| Intelligence index | 49.7 |
| First listed | 1 September 2026 |
Models it replaced
The feeds list Claude Fable 5.1 in place of anthropic/claude-fable-5. Those models' own prices and limits were different; an article that names one of them describes the model it was written about.
Anthropic's other models
| Model | Input / 1M | Output / 1M | Context | Listed |
|---|---|---|---|---|
| Claude Haiku 5.5 | $0.10 | $0.50 | 1M | 7 October 2026 |
| Claude Sonnet 5.5 | $2 | $10 | 1M | 28 September 2026 |
| Claude Opus 5.5 | $4 | $20 | 1M | 22 September 2026 |
Cited in these articles
- How to Start a Company in 2026: Founder's Guide
- Claude Fable 5: Coding and Company Building 2026
- Claude Code Websites: Build and Deploy in 2026
- Claude Code: The 2026 Website Builder Guide
- Top 20 Claude Code Skills for Web and App Builds
- Differentiated Design With AI: The 2026 Guide
- Claude Sonnet 5 for Building Websites (2026)
- Claude Code vs Codex vs Devin (2026)
- Cut AI Agent Costs With Model Routing (2026)
- Price Your AI Product to Beat Token Costs 2026
- GPT-6 Astra: What Shipped, Benchmarks, Pricing 2026
- Cut AI Costs With Prompt Caching (2026)
- Claude Max API Credits: Claim Them, Ship an App (2026)
Where these numbers come from
Read from OpenRouter's listing of Claude Fable 5.1 every 6 hours, with Anthropic's own /models endpoint confirming the model, into the catalog Founden's builders choose their models from. Prices are OpenRouter's listed price per million tokens: for a lab's closed models that is the lab's own list price, and for an open-weight model it is the price of the host OpenRouter routes to by default, which can differ from the lab's own API and from other hosts. US dollars, before batch, volume or regional discounts. Every model.