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Claude Fable 5.1 vs Grok 4.6
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| Attribute | Claude Fable 5.1 | Grok 4.6 |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 163 | 156 |
| Coding | 100 | 92 |
| Math | 96 | 92 |
| Reasoning & Knowledge | 94 | 73 |
| Agentic & Tools | 98 | 84 |
| Specifications | ||
| Developer | Anthropic | xAI |
| Family | Claude | Grok |
| Released | Sep 1, 2026 | Aug 12, 2026 |
| Parameters | — | — |
| Availability | API access | API access |
| Context window | 1M | 500K |
| Price — $/M input | $10.00 | $2.00 |
| Price — $/M output | $50.00 | $6.00 |
| Inputs | text, image, file | text, image, file |
| Outputs | text | text |
| Benchmarks | ||
| AIME 2024/2025 | 100% | 99% |
| APEX | 47% | 41% |
| ARC-AGI | 98% | 88% |
| ARC-AGI-2 | 90% | 67% |
| GPQA Diamond | 94% | 94% |
| Humanity's Last Exam | 47% | 43% |
| SciCode | 63% | 56% |
| SimpleQA Verified | 71% | 49% |
| WebDev Arena | 1765 | 1629 |
| WeirdML | 93% | 67% |
| SimpleBench | — | 76% |
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.