Claude Fable 5.1 is an AI model by Anthropic. View detailed benchmark scores, pricing data, and performance metrics on Serenities AI Models.
Specifications last checked against the provider on . Benchmark scores carry their own source, linked beside each number.
General Benchmarks
Artificial Analysis composite intelligence score across 10 sub-benchmarks
Artificial Analysis (via OpenRouter)Coding Benchmarks
Human preference ELO for building things — websites, UI, games, charts, SVG
Design Arena (via OpenRouter)Artificial Analysis composite coding score
Artificial Analysis (via OpenRouter)Human preference ELO for building a working web page from a brief
Design Arena (via OpenRouter)Reasoning Benchmarks
Artificial Analysis composite score for multi-step tool-using tasks
Artificial Analysis (via OpenRouter)Multi-turn service agent making tool calls under strict policy constraints
OpenRouter (measured)Cost Benchmarks
Cost per 1M cached input tokens — the price that actually applies to a long agent conversation
OpenRouter APIContext Benchmarks
Available from 24 providers
The same model costs different amounts depending on who serves it. You can bring your own key for 6 of these — connect it here.
| Provider | Input / 1M | Output / 1M | Cached in | Context | Your key |
|---|---|---|---|---|---|
| 302.AI | $10 | $50 | — | 1.0M | — |
| Amazon Bedrock | $10 | $50 | $0.25 | 1.0M | Supported |
| Anthropic | $10 | $50 | $0.25 | 1.0M | Supported |
| Azure | $10 | $50 | $0.25 | 1.0M | Supported |
| Azure Cognitive Services | $10 | $50 | $0.25 | 1.0M | — |
| Cloudflare AI Gateway | $10 | $50 | $0.25 | 1.0M | — |
| CrossModel | $10 | $50 | $0.25 | 1.0M | — |
| DevPass (LLM Gateway) | $10 | $50 | $0.25 | 1.0M | — |
| Eden AI | $10 | $50 | $0.25 | 1.0M | — |
| GitHub Copilot | $10 | $50 | $0.25 | 1.0M | — |
| Kilo Gateway | $10 | $50 | $0.25 | 1.0M | — |
| LLM Gateway | $10 | $50 | $0.25 | 1.0M | — |
| Merge Gateway | $10 | $50 | $0.25 | 1.0M | — |
| NanoGPT | $10 | $50 | $0.25 | 1.0M | — |
| Neon | $10 | $50 | $0.25 | 1.0M | — |
| Ofox | $10 | $50 | $0.25 | 1.0M | — |
| OpenCode Zen | $10 | $50 | $0.25 | 1.0M | — |
| OpenRouter | $10 | $50 | $0.25 | 1.0M | Supported |
| Requesty | $10 | $50 | $0.25 | 1.0M | — |
| Vercel AI Gateway | $10 | $50 | $0.25 | 1.0M | Supported |
| Vertex | $10 | $50 | $0.25 | 1.0M | Supported |
| Vertex (Anthropic) | $10 | $50 | $0.25 | 1.0M | — |
| Vivgrid | $10 | $50 | $0.5 | 1.0M | — |
| Venice AI | $12 | $60 | $0.3 | 1.0M | — |
Claude Fable 5.1 — Benchmark Scores Overview
Scores normalized to percentage scale for visual comparison. ELO scores mapped to 0-100 range (1100-1500).
Compare Claude Fable 5.1 With
Claude Fable 5.1 — Frequently Asked Questions
How much does Claude Fable 5.1 cost?
Claude Fable 5.1 costs $10.0 per 1M input tokens and $50.0 per 1M output tokens. This places it in the premium pricing tier.
What is the context window of Claude Fable 5.1?
Claude Fable 5.1 has a context window of 1.0M tokens. This determines how much text, conversation history, and code the model can process in a single request.
Who created Claude Fable 5.1?
Claude Fable 5.1 was created by Anthropic. It is classified as a flagship model in our catalogue.
Is Claude Fable 5.1 open source?
No, Claude Fable 5.1 is a proprietary model. It is available through Anthropic's API and compatible providers.