Compare / head-to-head
Claude Fable 5.1vsGrok 4.6
Claude Fable 5.1 leads 4 of 4 shared benchmarks. Grok 4.6 is 7.5x cheaper per token. Claude Fable 5.1 has the larger context window (1M tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
4 – 0
Claude Fable 5.1 leads
Cheaper per token
Grok 4.6
7.5x cheaper, input + output
Larger context
Claude Fable 5.1
1M tokens
Provider uptime (30d)
100% · —
Anthropic · xAI
Claude Fable 5.1
Anthropic · released 2026-09-01
textvision
Quality
Benchmark matrix
4 shared · 4 only Claude Fable 5.1 · 11 only Grok 4.6| Benchmark | Claude Fable 5.1 | Grok 4.6 | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 4 | ||||
| FrontierMath Tier 4 v2 (Epoch AI run) | 87.8% ↗epoch | 31.7% ↗epoch | +56.1 pt | Claude Fable 5.1 |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 90.2% ↗epoch | 66% ↗epoch | +24.2 pt | Claude Fable 5.1 |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 100% ↗epoch | 99.2% ↗epoch | +0.8 pt | Claude Fable 5.1 |
| SimpleQA Verified | 70.8% ↗epoch | 49.3% ↗epoch | +21.5 pt | Claude Fable 5.1 |
| Only Claude Fable 5.1 reports · 4 | ||||
| Humanity's Last Exam (no tools) | 60.9% ↗ | not reported | — | — |
| CursorBench 3.2.0 | 73.4% ↗ | not reported | — | — |
| GDPval-AA v2 | 1853 ↗ | not reported | — | — |
| Terminal-Bench Science 0.1 | 52.6% ↗ | not reported | — | — |
| Only Grok 4.6 reports · 11 | ||||
| GPQA Diamond | not reported | 94% ↗epoch | — | — |
| AA-Briefcase | not reported | 1577 ↗ | — | — |
| APEX-Agents | not reported | 57.5% ↗ | — | — |
| APEX-SWE | not reported | 56.4% ↗ | — | — |
| Artificial Analysis Intelligence Index | not reported | 61 ↗ | — | — |
| CursorBench 3.2 | not reported | 69.9% ↗ | — | — |
| DeepSWE v1.1 | not reported | 65.9% ↗ | — | — |
| FrontierCode v1.1 (Extended) | not reported | 61.3% ↗ | — | — |
| GDPVal-AA v2 | not reported | 1753 ↗ | — | — |
| Harvey LAB (Vals) | not reported | 15.8% ↗ | — | — |
| Terminal-Bench 3.0 | not reported | 26% ↗ | — | — |
Scores tagged "epoch" or "matharena" are independent runs, used only where the lab has not published its own; ⚠ marks rows MathArena flags as released after the competition. Higher is better on every row. Δ is Claude Fable 5.1 minus Grok 4.6 in the benchmark's own unit. "Not reported" means the lab has not published that figure; it is not a zero. ↗ opens the source.
Specs & pricing
Side by side
Official pricing pages and model cards| Spec | Claude Fable 5.1 | Grok 4.6 | Edge |
|---|---|---|---|
| Context window | 1M tokens | 500K tokens | Claude Fable 5.1 |
| Max output | 128K tokens | — | — |
| Input price / 1M | $10 ↗ | $2 ↗ | Grok 4.6 |
| Output price / 1M | $50 ↗ | $6 ↗ | Grok 4.6 |
| Cached input / 1M | $0.25 ↗ | $0.5 ↗ | Claude Fable 5.1 |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $60 | $8 | Grok 4.6 |
| Modalities | text · vision | text · vision | Tie |
| Released | 2026-09-01 | 2026-08-12 | — |
| Cited benchmark scores | 8 | 15 | — |
Reliability
Provider status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
Claude Fable 5.1 vs …
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Grok 4.6 vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
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