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Claude Fable 5.1
🇺🇸Anthropic4d
Context:1.0M tokens
Input:$10/1M
Output:$50/1M
Neura Index
96.6
Rank #4—
lowCategory Profile
Benchmark Scores (1)
reasoning
| Benchmark | Score | Source |
|---|---|---|
| Humanity's Last Exam | 65 | verified |
Performance History
Similar Models
Frequently Asked Questions about Claude Fable 5.1
What is Claude Fable 5.1's Neura Intelligence Index score?▾
Claude Fable 5.1 by Anthropic scores 96.6 out of 100 on the Neura Intelligence Index, ranking #4 among tracked AI models. This composite score is computed from 1 individual benchmarks across coding, math, reasoning, and language categories.
How much does Claude Fable 5.1 cost to use?▾
Claude Fable 5.1 costs $10/1M input tokens and $50/1M output tokens via API. At a typical 3:1 input-to-output ratio with 1M tokens/day usage, the estimated monthly cost is approximately $600.
Is Claude Fable 5.1 open source?▾
No, Claude Fable 5.1 is a proprietary model by Anthropic. It is only accessible via their API.
What is Claude Fable 5.1's context window?▾
Claude Fable 5.1 supports a context window of 1.0 million tokens, allowing it to process very long documents, codebases, and conversations in a single request.
What benchmark does Claude Fable 5.1 perform best on?▾
Claude Fable 5.1 achieves its highest score on Humanity's Last Exam with a score of 65.0%. This benchmark evaluates expert-level questions across diverse domains, designed to be the hardest public benchmark.