Anthropic: Claude Fable 5.1
Analysis Summary
Claude Fable 5.1 is Anthropic's newer Fable family release, with a million-token context window and broad input support for text, images, and files. Vision, tool use, and function calling make the configuration suitable for workflows that combine analysis, content generation, and external actions. The product design points toward high-value tasks involving substantial source material.
Design for Online could consider it for long-form editorial work, contract or research review, multimodal content operations, and agent workflows where context retention matters. However, this version has no independent benchmark data in the supplied record, so its reasoning and coding performance cannot yet be verified against proven alternatives. Pricing is premium, especially for output. It is an emerging option for controlled pilots, not a default production choice until measured results are available.
Assessed September 1, 2026
Editorial notes
Claude Fable 5.1 combines a million-token context window with vision, file handling, tool use, and function calling, making it well suited to complex content and document workflows. It has no independent benchmark data yet and carries premium pricing.
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
DFO Verdict
Claude Fable 5.1 combines a million-token context window with vision, file handling, tool use, and function calling, making it well suited to complex content and document workflows. It has no independent benchmark data yet and carries premium pricing.
How Anthropic: Claude Fable 5.1 compares
Anthropic: Claude Fable 5.1 ranks #1 of 432 AI models we track for overall intelligence, #1 of 205 for coding, #3 of 187 for agentic tasks. Its 1M-token context window is larger than 85% of the models we list. At $10.00 per million input tokens it is cheaper than 4% of comparable models.
Dark bar = input · light bar = output, scaled to the priciest peer.
1M tokens ≈ 8 full-length novels or ~2,500 pages of business documents in a single request.
Strongest on intelligence. The pulled-in value corner is the trade-off, and if the shape matters more than the price, this is your model.
Compare shapes side-by-side →Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $10.00 | $0.010000 |
| Output | $50.00 | $0.050000 |
What would Anthropic: Claude Fable 5.1 cost your business?
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A website chatbot handling around 100 customer conversations a day, a few short messages each.
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These numbers get smaller with the right architecture.
We route routine calls to cheap models and save Anthropic: Claude Fable 5.1 for the hard ones. Most clients cut their estimate by 60-80%.
Talk to our teamAbout Anthropic: Claude Fable 5.1
Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors, front-end and visual..
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Frequently asked questions about Anthropic: Claude Fable 5.1
How much does Anthropic: Claude Fable 5.1 cost?
Anthropic: Claude Fable 5.1 costs $10.00 per million input tokens and $50.00 per million output tokens.
What is the context window of Anthropic: Claude Fable 5.1?
Anthropic: Claude Fable 5.1 has a context window of 1,000,000 tokens (1M).
Is Anthropic: Claude Fable 5.1 good for coding?
On our coding benchmark index, Anthropic: Claude Fable 5.1 ranks #1 of 205 models, placing it in the top quartile of the field for code generation and debugging.
What can Anthropic: Claude Fable 5.1 do?
Anthropic: Claude Fable 5.1 supports image/vision input, tool use, and function calling.
Who created Anthropic: Claude Fable 5.1?
Anthropic: Claude Fable 5.1 is developed by Anthropic and was released on September 1, 2026.