# Claude Fable 5.1 vs Qwen3.8 Max

> Side-by-side benchmark comparison for Claude Fable 5.1 and Qwen3.8 Max across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-fable-5-1-vs-qwen3-8-max
- Last updated: October 17, 2026

- Shared sourced benchmarks: 16
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Pick Claude Fable 5.1 if you want the stronger benchmark profile. Qwen3.8 Max 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 69.66.
- The clearest category separation is in coding, where the averages are 76.8 for Claude Fable 5.1 and 53.6 for Qwen3.8 Max.
- The biggest single benchmark swing is FrontierMath v2 (Tier 4) in Mathematics, with scores of 87.805% and 46.341%.
- Qwen3.8 Max is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.

## Model Snapshot

| Property | Claude Fable 5.1 | Qwen3.8 Max |
|----------|----------|----------|
| Creator | Anthropic | Alibaba |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Overall Score | 83.18 | 69.66 |
| Benchmarks Covered | 33 | 66 |
| Pricing (input/output) | $10.00 / $50.00 | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Agentic

- Winner: Claude Fable 5.1
- Claude Fable 5.1 public-lane score: 80.9 (Supported · #2/128)
- Qwen3.8 Max public-lane score: 67.5 (Supported · #14/128)

| Benchmark | Claude Fable 5.1 | Qwen3.8 Max | 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% | 19.4% | Claude Fable 5.1 |
| AutomationBench | 31.4% | 27.3% | Claude Fable 5.1 |
| Toolathlon-Verified | 77.8% | 72.5% | Claude Fable 5.1 |
| 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% | 67.4% | Claude Fable 5.1 |
| ApprenticeBench | 72% | Coming soon | Coming soon |
| CWE-bench v1 | 58.0% | Coming soon | Coming soon |
| MazeBench | 10% | 0% | Claude Fable 5.1 |
| Terminal-Bench 2.1 | Coming soon | 86.6% | Coming soon |
| CoWorkBench | Coming soon | 74.8% | Coming soon |
| JobBench | Coming soon | 53.4% | Coming soon |
| skillsBench | Coming soon | 70.2% | Coming soon |
| Agents' Last Exam | Coming soon | 52.4% | Coming soon |
| WideResearch | Coming soon | 81.9% | Coming soon |
| HLE w/ tools | Coming soon | 56.2% | Coming soon |
| OSWorld-Verified | Coming soon | 86.1% | Coming soon |
| WebArena-Verified | Coming soon | 66.8% | Coming soon |
| AndroidWorld | Coming soon | 85.3% | Coming soon |
| MobileWorld | Coming soon | 77.8% | Coming soon |
| Hermes Index | Coming soon | 36.2% | Coming soon |
| Hermes Bench | Coming soon | 70.5% | Coming soon |

### Coding

- Winner: Claude Fable 5.1
- Claude Fable 5.1 public-lane score: 76.8 (Supported · #3/150)
- Qwen3.8 Max public-lane score: 53.6 (Supported · #34/150)

| Benchmark | Claude Fable 5.1 | Qwen3.8 Max | Winner |
|-----------|-----------|-----------|--------|
| Bug Hunt Bench | 43.0 fixes | 25.7 fixes | Claude Fable 5.1 |
| SWE-bench Pro | 81.2% | 67.7% | Claude Fable 5.1 |
| SWE Multilingual | 89.1% | Coming soon | Coming soon |
| SWE Multimodal | 54.7% | Coming soon | Coming soon |
| DeepSWE | 67.4% | 56.6% | Claude Fable 5.1 |
| FrontierSWE v2 | 56.3% | 15.8% | Claude Fable 5.1 |
| ProgramBench | 87.6% | Coming soon | Coming soon |
| CursorBench 3.2 | 73.4% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 90.5% | 87.9% | Claude Fable 5.1 |
| CursorBench 4.0 | 51.8% | Coming soon | Coming soon |
| PostTrainBench v1.1 | 40.2% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 86.6% | Coming soon |
| NL2Repo | Coming soon | 55.9% | Coming soon |
| FrontierSWE | Coming soon | 73.5% | Coming soon |
| MLS-Bench Lite | Coming soon | 41.0% | Coming soon |
| PaperBench | Coming soon | 93.0% | Coming soon |
| VulcanBench v3 | Coming soon | 81.2% | Coming soon |
| OpenHarmony Bench | Coming soon | 60.8% | Coming soon |
| SWE-bench (Vals) | Coming soon | 85.6% | Coming soon |

### Reasoning

- Winner: Not comparable
- Claude Fable 5.1 public-lane score: 85.2 (#4/28)
- Qwen3.8 Max public-lane score: 87.8 (Unranked · 2 rankable rows)

| Benchmark | Claude Fable 5.1 | Qwen3.8 Max | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | 97.50% | Coming soon | Coming soon |
| ARC-AGI-2 | 90% | Coming soon | Coming soon |
| GraphWalks BFS 256K–1M | 65.0% | Coming soon | Coming soon |
| MRCRv2 | Coming soon | 92.9% | Coming soon |
| LongBench v2 | Coming soon | 66.3% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Claude Fable 5.1 public-lane score: Coming soon
- Qwen3.8 Max public-lane score: 91.2 (#4/54)

| Benchmark | Claude Fable 5.1 | Qwen3.8 Max | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | Coming soon | 82.3% | Coming soon |
| MathVision | Coming soon | 95.2% | Coming soon |
| MathVision w/ Python | Coming soon | 97.7% | Coming soon |
| BabyVision | Coming soon | 82.0% | Coming soon |
| BabyVision w/ Python | Coming soon | 91.3% | Coming soon |
| ZeroBench | Coming soon | 24.0% | Coming soon |
| ZeroBench w/ Python | Coming soon | 49.0% | Coming soon |
| MedXpertQA (MM) | Coming soon | 80.4% | Coming soon |
| ScreenSpot Pro | Coming soon | 84.5% | Coming soon |
| Vision2Web | Coming soon | 69.0% | Coming soon |
| CharXiv w/o tools | Coming soon | 88.4% | Coming soon |
| CharXiv | Coming soon | 93.5% | Coming soon |
| OmniDocBench 1.5 | Coming soon | 92.1% | Coming soon |
| OCRBench V2 | Coming soon | 74.2% | Coming soon |
| CC-OCR | Coming soon | 79.6% | Coming soon |
| RealWorldQA | Coming soon | 88.0% | Coming soon |
| ERQA | Coming soon | 77.8% | Coming soon |
| SimpleVQA | Coming soon | 75.0% | Coming soon |
| PerceptionBench | Coming soon | 63.5% | Coming soon |
| Video-MME (with subtitle) | Coming soon | 90.4% | Coming soon |
| VideoMMMU | Coming soon | 88.7% | Coming soon |
| MMVU | Coming soon | 82.4% | Coming soon |
| MLVU (M-Avg) | Coming soon | 90.8% | Coming soon |
| LVBench | Coming soon | 81.8% | Coming soon |

### Knowledge

- Winner: Claude Fable 5.1
- Claude Fable 5.1 public-lane score: 86.9 (Supported · #2/184)
- Qwen3.8 Max public-lane score: 68.2 (Supported · #24/184)

| Benchmark | Claude Fable 5.1 | Qwen3.8 Max | Winner |
|-----------|-----------|-----------|--------|
| HLE | 65% | 43.6% | Claude Fable 5.1 |
| HLE w/o tools | 60.9% | 43.6% | Claude Fable 5.1 |
| GPQA Diamond (Vals) | 93.4% | 93.7% | Qwen3.8 Max |
| MMLU-Pro (Vals) | 92.4% | 88.6% | Claude Fable 5.1 |
| GPQA | Coming soon | 92.6% | Coming soon |
| GPQA-D | Coming soon | 92.6% | Coming soon |

### Instruction Following

- Winner: Not comparable
- Claude Fable 5.1 public-lane score: Coming soon
- Qwen3.8 Max public-lane score: 94.7 (#2/148)

| Benchmark | Claude Fable 5.1 | Qwen3.8 Max | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | 1.0% | Coming soon | Coming soon |
| IFBench | Coming soon | 82.8% | Coming soon |

### Mathematics

- Winner: Not comparable
- Claude Fable 5.1 public-lane score: 96.8 (Unranked · 2 rankable rows)
- Qwen3.8 Max public-lane score: 78.9 (Unranked · 2 rankable rows)

| Benchmark | Claude Fable 5.1 | Qwen3.8 Max | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 90.175% | 74.737% | Claude Fable 5.1 |
| FrontierMath v2 (Tier 4) | 87.805% | 46.341% | Claude Fable 5.1 |

## FAQ

### Which is better overall, Claude Fable 5.1 or Qwen3.8 Max?

Claude Fable 5.1 is ahead overall on BenchLM right now.

### Where is the biggest gap between Claude Fable 5.1 and Qwen3.8 Max?

The widest category gap is in coding, where the averages are 76.8 for Claude Fable 5.1 and 53.6 for Qwen3.8 Max.

### 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 Qwen3.8 Max cover on BenchLM?

Qwen3.8 Max currently has 66 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Fable 5.1 vs Claude Fable 5](/compare/claude-fable-vs-claude-fable-5-1)
- [Qwen3.8 Max vs Claude Fable 5](/compare/claude-fable-vs-qwen3-8-max)
- [Claude Fable 5.1 vs Qwen3.8 Max Preview](/compare/claude-fable-5-1-vs-qwen3-8-max-preview)
- [Qwen3.8 Max vs Qwen3.8 Max Preview](/compare/qwen3-8-max-vs-qwen3-8-max-preview)

## Explore More

- [Claude Fable 5.1 profile](/models/claude-fable-5-1)
- [Qwen3.8 Max profile](/models/qwen3-8-max)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)