# Claude Fable 5.1 vs Grok 4.6

> Side-by-side benchmark comparison for Claude Fable 5.1 and Grok 4.6 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-fable-5-1-vs-grok-4-6
- Last updated: October 17, 2026

- Shared sourced benchmarks: 17
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Pick Claude Fable 5.1 if you want the stronger benchmark profile. Grok 4.6 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Claude Fable 5.1 leads overall 83.18 to 67.02.
- The clearest category separation is in mathematics, where the averages are 96.8 for Claude Fable 5.1 and 70.1 for Grok 4.6.
- The biggest single benchmark swing is ApprenticeBench in Agentic, with scores of 72% and 13%.
- Grok 4.6 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Claude Fable 5.1 also has the larger context window at 1M.

## Model Snapshot

| Property | Claude Fable 5.1 | Grok 4.6 |
|----------|----------|----------|
| Creator | Anthropic | xAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 500K |
| Overall Score | 83.18 | 67.02 |
| Benchmarks Covered | 33 | 23 |
| Pricing (input/output) | $10.00 / $50.00 | $2.00 / $6.00 |

## Category Breakdown

### Agentic

- Winner: Claude Fable 5.1
- Claude Fable 5.1 public-lane score: 80.9 (Supported · #2/128)
- Grok 4.6 public-lane score: 69.8 (Supported · #9/128)

| Benchmark | Claude Fable 5.1 | Grok 4.6 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 4.0 | 55.80% | Coming soon | Coming soon |
| Terminal-Bench-Science 0.1 | 52.6% | Coming soon | Coming soon |
| OSWorld 2.0 | 41.7% | Coming soon | Coming soon |
| AutomationBench | 31.4% | Coming soon | Coming soon |
| Toolathlon-Verified | 77.8% | Coming soon | Coming soon |
| Toolathlon Verified Pass@3 | 81.5% | Coming soon | Coming soon |
| Toolathlon Verified Pass³ | 73.1% | Coming soon | Coming soon |
| Toolathlon Verified avg. turns | 23.7 turns | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 85.0% | 78.3% | Claude Fable 5.1 |
| ApprenticeBench | 72% | 13% | Claude Fable 5.1 |
| CWE-bench v1 | 58.0% | 57.0% | Claude Fable 5.1 |
| MazeBench | 10% | 1% | Claude Fable 5.1 |
| Terminal-Bench 3.0 | Coming soon | 26.5% | Coming soon |
| APEX-Agents | Coming soon | 57.5% | Coming soon |

### Coding

- Winner: Claude Fable 5.1
- Claude Fable 5.1 public-lane score: 76.8 (Supported · #3/150)
- Grok 4.6 public-lane score: 58.5 (Supported · #23/150)

| Benchmark | Claude Fable 5.1 | Grok 4.6 | Winner |
|-----------|-----------|-----------|--------|
| Bug Hunt Bench | 43.0 fixes | 27.0 fixes | Claude Fable 5.1 |
| SWE-bench Pro | 81.2% | Coming soon | Coming soon |
| SWE Multilingual | 89.1% | Coming soon | Coming soon |
| SWE Multimodal | 54.7% | Coming soon | Coming soon |
| DeepSWE | 67.4% | 65.9% | Claude Fable 5.1 |
| FrontierSWE v2 | 56.3% | 25.3% | Claude Fable 5.1 |
| ProgramBench | 87.6% | Coming soon | Coming soon |
| CursorBench 3.2 | 73.4% | 70.8% | Claude Fable 5.1 |
| LiveCodeBench (Vals) | 90.5% | 88.2% | Claude Fable 5.1 |
| CursorBench 4.0 | 51.8% | 41.4% | Claude Fable 5.1 |
| PostTrainBench v1.1 | 40.2% | Coming soon | Coming soon |
| FrontierCode 1.1 Extended | Coming soon | 61.3% | Coming soon |
| VulcanBench v3 | Coming soon | 87.0% | Coming soon |
| SWE-bench (Vals) | Coming soon | 95.6% | Coming soon |

### Reasoning

- Winner: Directional only
- Claude Fable 5.1 public-lane score: 85.2 (#4/28)
- Grok 4.6 public-lane score: 61.4 (#25/28)

| Benchmark | Claude Fable 5.1 | Grok 4.6 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | 97.50% | 87.00% | Claude Fable 5.1 |
| ARC-AGI-2 | 90% | 67.1% | Claude Fable 5.1 |
| GraphWalks BFS 256K–1M | 65.0% | Coming soon | Coming soon |
| ARC-AGI-3 | Coming soon | 2.1% | Coming soon |

### Knowledge

- Winner: Claude Fable 5.1
- Claude Fable 5.1 public-lane score: 86.9 (Supported · #2/184)
- Grok 4.6 public-lane score: 69.4 (Supported · #18/184)

| Benchmark | Claude Fable 5.1 | Grok 4.6 | Winner |
|-----------|-----------|-----------|--------|
| HLE | 65% | Coming soon | Coming soon |
| HLE w/o tools | 60.9% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 93.4% | 94.7% | Grok 4.6 |
| MMLU-Pro (Vals) | 92.4% | 89.4% | Claude Fable 5.1 |

### Instruction Following

- Winner: Not comparable
- Claude Fable 5.1 public-lane score: Coming soon
- Grok 4.6 public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | Grok 4.6 | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | 1.0% | 51.8% | Claude Fable 5.1 |

### Mathematics

- Winner: Not comparable
- Claude Fable 5.1 public-lane score: 96.8 (Unranked · 2 rankable rows)
- Grok 4.6 public-lane score: 70.1 (Unranked · 2 rankable rows)

| Benchmark | Claude Fable 5.1 | Grok 4.6 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 90.175% | 65.965% | Claude Fable 5.1 |
| FrontierMath v2 (Tier 4) | 87.805% | 31.707% | Claude Fable 5.1 |

## FAQ

### Which is better overall, Claude Fable 5.1 or Grok 4.6?

Claude Fable 5.1 is ahead overall on BenchLM right now.

### Where is the biggest gap between Claude Fable 5.1 and Grok 4.6?

The widest category gap is in mathematics, where the averages are 96.8 for Claude Fable 5.1 and 70.1 for Grok 4.6.

### How many benchmarks does Claude Fable 5.1 cover on BenchLM?

Claude Fable 5.1 currently has 33 sourced benchmark scores on BenchLM.

### How many benchmarks does Grok 4.6 cover on BenchLM?

Grok 4.6 currently has 23 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Fable 5.1 vs Claude Fable 5](/compare/claude-fable-vs-claude-fable-5-1)
- [Grok 4.6 vs Claude Fable 5](/compare/claude-fable-vs-grok-4-6)
- [Claude Fable 5.1 vs Claude Opus 5.5](/compare/claude-fable-5-1-vs-claude-opus-5-5)
- [Grok 4.6 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-grok-4-6)

## Explore More

- [Claude Fable 5.1 profile](/models/claude-fable-5-1)
- [Grok 4.6 profile](/models/grok-4-6)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)