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Claude Fable 5 vs Grok 4
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| Attribute | Claude Fable 5 | Grok 4 |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 162 | 147 |
| Coding | 98 | 43 |
| Math | 97 | 23 |
| Reasoning & Knowledge | 90 | 47 |
| Agentic & Tools | 98 | 15 |
| Specifications | ||
| Developer | Anthropic | xAI |
| Family | Claude | Grok |
| Released | Jun 9, 2026 | Jul 9, 2025 |
| Parameters | — | 3T |
| Availability | API access | API access |
| Context window | 1M | — |
| Price — $/M input | $10.00 | — |
| Price — $/M output | $50.00 | — |
| Inputs | text, image, file | — |
| Outputs | text | — |
| Benchmarks | ||
| AIME 2024/2025 | 100% | 84% |
| APEX | 45% | 15% |
| ARC-AGI | 99% | 67% |
| ARC-AGI-2 | 89% | 16% |
| GPQA Diamond | 86% | 87% |
| Humanity's Last Exam | 56% | 27% |
| SciCode | 60% | 46% |
| SimpleBench | 82% | 61% |
| SimpleQA Verified | 68% | 48% |
| WebDev Arena | 1654 | — |
| WeirdML | 92% | 46% |
| τ²-bench | 99% | 75% |
| FrontierMath | — | 20% |
| FrontierMath Tier 4 | — | 2% |
| GDPval (win/tie rate) | — | 24% |
| LiveCodeBench | — | 82% |
| METR task horizon | — | 1.8 h |
| MMLU-Pro | — | 87% |
| Terminal-Bench | — | 27% |
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.