# Claude Fable 5.1 vs Qwen3.8-Omni-Flash

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

- Canonical page: https://benchlm.ai/compare/claude-fable-5-1-vs-qwen3-8-omni-flash
- Last updated: September 18, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Pick Claude Fable 5.1 if you want the stronger benchmark profile. Qwen3.8-Omni-Flash 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 84.74 to 63.
- The clearest category separation is in knowledge, where the averages are 86.7 for Claude Fable 5.1 and 54.9 for Qwen3.8-Omni-Flash.
- The biggest single benchmark swing is HLE in Knowledge, with scores of 65% and 36.5%.
- Qwen3.8-Omni-Flash 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-Omni-Flash |
|----------|----------|----------|
| Creator | Anthropic | Alibaba |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Overall Score | 84.74 | null |
| Benchmarks Covered | 26 | 19 |
| Pricing (input/output) | $10.00 / $50.00 | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Agentic

- Winner: Coming soon
- Claude Fable 5.1 public-lane score: 80.2 (Supported · #1/154)
- Qwen3.8-Omni-Flash public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | Qwen3.8-Omni-Flash | 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% | Coming soon | Coming soon |
| ApprenticeBench | 72% | Coming soon | Coming soon |
| CoWorkBench | Coming soon | 75.3% | Coming soon |
| AndroidWorld | Coming soon | 87.1% | Coming soon |

### Coding

- Winner: Coming soon
- Claude Fable 5.1 public-lane score: 83.8 (Supported · #1/154)
- Qwen3.8-Omni-Flash public-lane score: 53.5 (Estimated · #45/154)

| Benchmark | Claude Fable 5.1 | Qwen3.8-Omni-Flash | Winner |
|-----------|-----------|-----------|--------|
| Bug Hunt Bench | 43 fixes | Coming soon | Coming soon |
| SWE-bench Pro | 81.2% | 63.3% | Claude Fable 5.1 |
| SWE Multilingual | 89.1% | 80.5% | Claude Fable 5.1 |
| SWE Multimodal | 54.7% | Coming soon | Coming soon |
| DeepSWE | 67.4% | 57.8% | Claude Fable 5.1 |
| FrontierSWE v2 | 56.3% | Coming soon | Coming soon |
| ProgramBench | 87.6% | Coming soon | Coming soon |
| cursorBench32 | 73.4% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 90.5% | Coming soon | Coming soon |
| cursorBench40 | 51.8% | Coming soon | Coming soon |
| NL2Repo | Coming soon | 48.9% | Coming soon |
| LiveCodeBench v6 | Coming soon | 92.6% | Coming soon |

### Multimodal & Grounded

- Winner: Coming soon
- Claude Fable 5.1 public-lane score: Coming soon
- Qwen3.8-Omni-Flash public-lane score: 85.1 (Unranked · 7 rankable rows)

| Benchmark | Claude Fable 5.1 | Qwen3.8-Omni-Flash | Winner |
|-----------|-----------|-----------|--------|
| Vision2Web | Coming soon | 62.9% | Coming soon |
| ERQA | Coming soon | 71.0% | Coming soon |
| LVBench | Coming soon | 76.9% | Coming soon |
| RealWorldQA | Coming soon | 87.7% | Coming soon |
| MathVision | Coming soon | 91.8% | Coming soon |
| MathVision w/ Python | Coming soon | 96.2% | Coming soon |
| CharXiv w/o tools | Coming soon | 83.5% | Coming soon |
| CharXiv | Coming soon | 91.4% | Coming soon |

### Reasoning

- Winner: Coming soon
- Claude Fable 5.1 public-lane score: 79.4 (#2/20)
- Qwen3.8-Omni-Flash public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | Qwen3.8-Omni-Flash | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | 97.50% | Coming soon | Coming soon |
| ARC-AGI-2 | 90% | Coming soon | Coming soon |

### Knowledge

- Winner: Coming soon
- Claude Fable 5.1 public-lane score: 86.7 (Supported · #1/184)
- Qwen3.8-Omni-Flash public-lane score: 54.9 (Estimated · #54/184)

| Benchmark | Claude Fable 5.1 | Qwen3.8-Omni-Flash | Winner |
|-----------|-----------|-----------|--------|
| HLE | 65% | 36.5% | Claude Fable 5.1 |
| HLE w/o tools | 60.9% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 93.4% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 92.4% | Coming soon | Coming soon |
| GPQA | Coming soon | 91% | Coming soon |
| GPQA-D | Coming soon | 91.0% | Coming soon |

### Instruction Following

- Winner: Coming soon
- Claude Fable 5.1 public-lane score: Coming soon
- Qwen3.8-Omni-Flash public-lane score: 87.7 (#29/124)

| Benchmark | Claude Fable 5.1 | Qwen3.8-Omni-Flash | Winner |
|-----------|-----------|-----------|--------|
| IFBench | Coming soon | 81.5% | Coming soon |

## FAQ

### Which is better overall, Claude Fable 5.1 or Qwen3.8-Omni-Flash?

Claude Fable 5.1 is ahead overall on BenchLM right now.

### Where is the biggest gap between Claude Fable 5.1 and Qwen3.8-Omni-Flash?

The widest category gap is in knowledge, where the averages are 86.7 for Claude Fable 5.1 and 54.9 for Qwen3.8-Omni-Flash.

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

Claude Fable 5.1 currently has 26 sourced benchmark scores on BenchLM.

### How many benchmarks does Qwen3.8-Omni-Flash cover on BenchLM?

Qwen3.8-Omni-Flash currently has 19 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-Omni-Flash vs Claude Fable 5](/compare/claude-fable-vs-qwen3-8-omni-flash)
- [Claude Fable 5.1 vs GPT-6 Astra](/compare/claude-fable-5-1-vs-gpt-6-astra)
- [Qwen3.8-Omni-Flash vs GPT-6 Astra](/compare/gpt-6-astra-vs-qwen3-8-omni-flash)

## Explore More

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