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Claude Fable 5.1
Commercial useClaude Fable 5.1 (Anthropic, 01/09/2026) is the most powerful model currently available, ranking above Opus 5 — specialized in multi-step reasoning and long-session agentic tasks. Context 1 million tokens, knowledge cutoff 06/2026, adaptive thinking always on. In exchange, it is slower and more expensive than Opus 5; since 22/09/2026 Anthropic recommends Opus 5.5 as the default for most work, and Haiku for short tasks or classification. Note on naming: "Fable" does not mean the model specializes in creative writing — its writing style is denser and less formatted than Opus 5.
Pricing theo tokenInput 560 credits / 1M (≈ $2.80)Output 2800 credits / 1M (≈ $14.00)
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Input
Used to describe the generated output.
Image for reference
Cho model tra cuu web (WebSearch + WebFetch) khi can thong tin moi. Chi ho tro model Claude.
Priced per token (in 560 · out 2800 cr / 1M)
Output
output typetext
Ready to create
Fill the inputs and click Run.
Examples
Click an example to load it into the Playground and try it.
README
Claude Fable 5.1 API
Claude Fable 5.1 (Anthropic, 01/09/2026) is the most powerful model currently available, ranking above Opus 5 — specialized in multi-step reasoning and long-session agentic tasks. Context 1 million tokens, knowledge cutoff 06/2026, adaptive thinking always on. In exchange, it is slower and more expensive than Opus 5; since 22/09/2026 Anthropic recommends Opus 5.5 as the default for most work, and Haiku for short tasks or classification. Note on naming: "Fable" does not mean the model specializes in creative writing — its writing style is denser and less formatted than Opus 5.
Capabilities
- ✓ chat
How to use it on CinAPI
- 1Create an API key. Go to API Keys to create a hal_… key for your app.
- 2Try it in the Playground. Fill in the Playground tab form and click Run to see instant results (real credits deducted).
- 3Call via the API. POST to /v1/claude with a Bearer key to integrate it into your product.
- 4Integrate & scale. One key works for every model (text / image / video). Track usage & logs in the dashboard.
Pricing
0 credits per run (≈ $0.00). Credits never expire; top up on the Billing page. Some models are priced by parameters (resolution, duration) — the price updates in real time on the Run button before you run.
Frequently asked questions
Sign up for a CinAPI account, create an API key under API Keys, then call the endpoint with a Bearer key. New accounts get 200 free credits.
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