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Claude Fable 5 vs Claude Sonnet 4.6
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| Attribute | Claude Fable 5 | Claude Sonnet 4.6 |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 163 | 152 |
| Coding | 96 | 56 |
| Math | 95 | 44 |
| Reasoning & Knowledge | 89 | 52 |
| Agentic & Tools | 94 | 45 |
| Specifications | ||
| Developer | Anthropic | Anthropic |
| Family | Claude | Claude |
| Released | Jun 9, 2026 | Feb 17, 2026 |
| Parameters | — | — |
| Availability | API access | API access |
| Context window | 1M | 1M |
| Price — $/M input | $10.00 | $3.00 |
| Price — $/M output | $50.00 | $15.00 |
| Inputs | text, image, file | text, image, file |
| Outputs | text | text |
| Benchmarks | ||
| AIME 2024/2025 | 100% | 86% |
| APEX | 64% | 43% |
| ARC-AGI | 99% | 87% |
| ARC-AGI-2 | 89% | 60% |
| GPQA Diamond | 86% | 87% |
| Humanity's Last Exam | 56% | 34% |
| SciCode | 61% | 50% |
| SimpleBench | 82% | — |
| SimpleQA Verified | 71% | 36% |
| WebDev Arena | 1628 | 1521 |
| WeirdML | 92% | 66% |
| τ²-bench | 99% | 76% |
| FrontierMath | — | 32% |
| FrontierMath Tier 4 | — | 8% |
| SWE-bench Verified | — | 75% |
| Terminal-Bench | — | 53% |
Use-case scores are 0–100 percentile composites across each area’s benchmarks, ranked against every model from the past year. Highlighted cells lead each row. Open a model for the full picture.
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Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.