Claude Fable 5.1 vs Grok 4.6
Claude Fable 5.1 (Anthropic) and Grok 4.6 (xAI) compared on benchmarks, pricing, context window, and use-case rankings.
- Claude Fable 5.1 leads on overall intelligence (ECI 163 vs 156).
- Grok 4.6 is cheaper on input tokens — $2.00 vs $10.00 per 1M.
- Claude Fable 5.1 has a larger context window (1M vs 500K tokens).
- Claude Fable 5.1 ranks higher for coding (100th vs 92th percentile).
| 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 | 85 |
| 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.
Frequently asked questions
Is Claude Fable 5.1 better than Grok 4.6?
On Epoch AI's Capabilities Index, Claude Fable 5.1 scores higher (163) than Grok 4.6 (156). The right pick depends on your task — compare their coding, math, and reasoning scores in the table above.
Which is cheaper, Claude Fable 5.1 or Grok 4.6?
Grok 4.6 is cheaper on input tokens at $2.00 per million, versus $10.00 (representative OpenRouter pricing).
Which has a larger context window, Claude Fable 5.1 or Grok 4.6?
Claude Fable 5.1 supports up to 1M tokens, compared with 500K for the other.
Which is better for coding, Claude Fable 5.1 or Grok 4.6?
Across coding benchmarks like SWE-bench Verified and Terminal-Bench, Claude Fable 5.1 ranks higher — 100th vs 92th percentile among the models tracked on Model Beat.
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Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.