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Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback)
Anthropic · Released 2026-09-01 · Independent benchmark scores from Artificial Analysis
Intelligence Index
53.4
Output speed
69.0
tokens/sec
Blended price
$20.00
per 1M tokens
Time to first token
131.81s
Model metadata
| Model ID | 3e87c73e-a257-495e-9730-367a66229811 |
|---|---|
| Slug | claude-fable-5-1 |
| Release date | 2026-09-01 |
| Provider | Anthropic |
| Provider slug | anthropic |
| Output speed | 69.0 tok/s |
| Time to first token | 131.81s |
| Time to first answer | 131.81s |
| Blended price ($/1M) | $20.00 |
| Input price ($/1M) | $10.00 |
| Output price ($/1M) | $50.00 |
All evaluation scores (17)
| aime | — |
|---|---|
| aime 25 | — |
| artificial analysis coding index | 81.60 |
| artificial analysis intelligence index | 53.40 |
| artificial analysis math index | — |
| gpqa | 93.7% |
| hle | 59.1% |
| ifbench | — |
| lcr | 85.3% |
| livecodebench | — |
| math 500 | — |
| mmlu pro | — |
| scicode | 63.1% |
| tau banking | 47.2% |
| tau2 | — |
| terminalbench hard | — |
| terminalbench v2 1 | 91.4% |
Source: artificialanalysis.ai/models/claude-fable-5-1
Benchmark data from Artificial Analysis.