Anthropic
Claude Fable 5.1
Claude model for demanding reasoning and long-horizon agentic work
Model facts
- Context window
- 1M tokens
- Maximum output
- 128K tokens
- Cheapest paid input
- $5 per 1M tokens
- Cheapest paid output
- $25 per 1M tokens
- Open weights
- no
- Providers
- 26
Capabilities and modalities
reasoning, tool calling, structured output, attachments, text, image, pdf.
Artificial Analysis benchmarks
Compare this model on the full LLM benchmark leaderboard.
| Configuration | AAI | Coding | Math | Output tokens/s |
|---|---|---|---|---|
| Adaptive Reasoning, Max Effort, Default Fallback | 65.7 | 81.6 | not measured | 70.3 |
| Adaptive Reasoning, Xhigh Effort, Default Fallback | 64.8 | 80.7 | not measured | 63.2 |
| Adaptive Reasoning, High Effort, Default Fallback | 62.5 | 79.1 | not measured | 51.4 |
| Adaptive Reasoning, Medium Effort, Default Fallback | 60.5 | 77.1 | not measured | 50.0 |
| Adaptive Reasoning, Low Effort, Default Fallback | 58.1 | 75.2 | not measured | 49.6 |
Observed price history
- 2026-09-01: $10 input / $50 output per 1M tokens
- 2026-09-02: $5 input / $25 output per 1M tokens
API providers
- GitLab Duo (Agentic Chat) — model id duo-chat-fable-5-1; free input / free output per 1M tokens; provider documentation
- OpenRouter (batch) — model id anthropic/claude-fable-5.1:batch; $5 input / $25 output per 1M tokens; provider documentation
- Amazon Bedrock — model id anthropic.claude-fable-5-1; $10 input / $50 output per 1M tokens; provider documentation
- Amazon Bedrock (Global) — model id global.anthropic.claude-fable-5-1; $10 input / $50 output per 1M tokens; provider documentation
- Anthropic — model id claude-fable-5-1; $10 input / $50 output per 1M tokens; provider documentation
- Azure — model id claude-fable-5-1; $10 input / $50 output per 1M tokens; provider documentation
- Azure Cognitive Services — model id claude-fable-5-1; $10 input / $50 output per 1M tokens; provider documentation
- CrossModel — model id anthropic/claude-fable-5-1; $10 input / $50 output per 1M tokens; provider documentation
- DevPass (LLM Gateway) — model id claude-fable-5-1; $10 input / $50 output per 1M tokens; provider documentation
- DigitalOcean (Anthropic) — model id anthropic-claude-fable-5.1; $10 input / $50 output per 1M tokens; provider documentation
- Eden AI — model id anthropic/claude-fable-5-1; $10 input / $50 output per 1M tokens; provider documentation
- Eden AI — model id anthropic/claude-fable-latest; $10 input / $50 output per 1M tokens; provider documentation
- Kilo Gateway — model id anthropic/claude-fable-5.1; $10 input / $50 output per 1M tokens; provider documentation
- LLM Gateway (Anthropic) — model id anthropic/claude-fable-5-1; $10 input / $50 output per 1M tokens; provider documentation
- Merge Gateway — model id anthropic/claude-fable-5-1; $10 input / $50 output per 1M tokens; provider documentation
- NanoGPT — model id anthropic/claude-fable-5.1; $10 input / $50 output per 1M tokens; provider documentation
- Ofox — model id anthropic/claude-fable-5.1; $10 input / $50 output per 1M tokens; provider documentation
- OpenCode Zen — model id claude-fable-5-1; $10 input / $50 output per 1M tokens; provider documentation
- OpenRouter — model id anthropic/claude-fable-5.1; $10 input / $50 output per 1M tokens; provider documentation
- Requesty — model id claude-fable-5.1; $10 input / $50 output per 1M tokens; provider documentation
- Vercel AI Gateway — model id anthropic/claude-fable-5.1; $10 input / $50 output per 1M tokens; provider documentation
- Vertex — model id claude-fable-5-1@default; $10 input / $50 output per 1M tokens; provider documentation
- Vertex (Anthropic) — model id claude-fable-5-1@default; $10 input / $50 output per 1M tokens; provider documentation
- Amazon Bedrock (US) — model id us.anthropic.claude-fable-5-1; $11 input / $55 output per 1M tokens; provider documentation
- Requesty (EU) — model id claude-fable-5.1@eu; $11 input / $55 output per 1M tokens; provider documentation
- Venice AI — model id claude-fable-5-1; $12 input / $60 output per 1M tokens; provider documentation