# Claude Sonnet 4.6 vs Qwen3.5 Flash

> Side-by-side benchmark comparison for Claude Sonnet 4.6 and Qwen3.5 Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-sonnet-4-6-vs-qwen3-5-flash
- Last updated: September 29, 2026

- Shared sourced benchmarks: 6
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

Pick Claude Sonnet 4.6 if you want the stronger benchmark profile. Qwen3.5 Flash only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Claude Sonnet 4.6 leads overall 56.13 to 45.47.
- The clearest category separation is in coding, where the averages are 47 for Claude Sonnet 4.6 and 26.5 for Qwen3.5 Flash.
- The biggest single benchmark swing is FrontierMath v2 (Tiers 1-3) in Mathematics, with scores of 32.400% and 6.207%.
- Qwen3.5 Flash is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Qwen3.5 Flash also has the larger context window at 1M.

## Model Snapshot

| Property | Claude Sonnet 4.6 | Qwen3.5 Flash |
|----------|----------|----------|
| Creator | Anthropic | Alibaba |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 200K | 1M |
| Overall Score | 56.13 | 45.47 |
| Benchmarks Covered | 26 | 6 |
| Pricing (input/output) | $3.00 / $15.00 | $0.10 / $0.40 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- Claude Sonnet 4.6 public-lane score: 43.1 (Supported · #51/117)
- Qwen3.5 Flash public-lane score: Coming soon

| Benchmark | Claude Sonnet 4.6 | Qwen3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 59.1% | Coming soon | Coming soon |
| OSWorld-Verified | 72.1% | Coming soon | Coming soon |
| Claw-Eval | 67.8% | Coming soon | Coming soon |
| CyberGym | 65.2% | Coming soon | Coming soon |
| Gert Labs | 62.92% | Coming soon | Coming soon |
| OSWorld 2.0 | 8.3% | Coming soon | Coming soon |
| JobBench | 36.9% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 57.3% | Coming soon | Coming soon |
| ApprenticeBench | 2% | Coming soon | Coming soon |

### Coding

- Winner: Directional only
- Claude Sonnet 4.6 public-lane score: 47 (Supported · #48/143)
- Qwen3.5 Flash public-lane score: 26.5 (Estimated · #103/143)

| Benchmark | Claude Sonnet 4.6 | Qwen3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 79.6% | Coming soon | Coming soon |
| SWE-Rebench | 60.7% | Coming soon | Coming soon |
| React Native Evals | 80.6% | Coming soon | Coming soon |
| Vibe Code Bench | 51.48% | Coming soon | Coming soon |
| cursorBench31 | 48.8% | Coming soon | Coming soon |
| FrontierCode 1.1 Main | 24.3% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 82.1% | 83.3% | Qwen3.5 Flash |
| SWE-bench (Vals) | 77.4% | 64.4% | Claude Sonnet 4.6 |

### Reasoning

- Winner: Not comparable
- Claude Sonnet 4.6 public-lane score: 69.2 (Unranked · 2 rankable rows)
- Qwen3.5 Flash public-lane score: Coming soon

### Multimodal & Grounded

- Winner: Not comparable
- Claude Sonnet 4.6 public-lane score: 55.1 (#35/50)
- Qwen3.5 Flash public-lane score: Coming soon

| Benchmark | Claude Sonnet 4.6 | Qwen3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| CharXiv | 77.4% | Coming soon | Coming soon |

### Knowledge

- Winner: Directional only
- Claude Sonnet 4.6 public-lane score: 52.8 (Supported · #54/169)
- Qwen3.5 Flash public-lane score: 43.1 (Estimated · #85/169)

| Benchmark | Claude Sonnet 4.6 | Qwen3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 89.9% | Coming soon | Coming soon |
| SuperGPQA | 95% | Coming soon | Coming soon |
| MMLU-Pro | 79.2% | Coming soon | Coming soon |
| HLE | 49% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 85.6% | 82.8% | Claude Sonnet 4.6 |
| MMLU-Pro (Vals) | 87.3% | 84.1% | Claude Sonnet 4.6 |

### Instruction Following

- Winner: Not comparable
- Claude Sonnet 4.6 public-lane score: 46.6 (#88/124)
- Qwen3.5 Flash public-lane score: Coming soon

### Mathematics

- Winner: Not comparable
- Claude Sonnet 4.6 public-lane score: 48.8 (Unranked · 2 rankable rows)
- Qwen3.5 Flash public-lane score: 28.4 (Unranked · 2 rankable rows)

| Benchmark | Claude Sonnet 4.6 | Qwen3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 32.400% | 6.207% | Claude Sonnet 4.6 |
| FrontierMath v2 (Tier 4) | 8.300% | 0.000% | Claude Sonnet 4.6 |

## FAQ

### Which is better overall, Claude Sonnet 4.6 or Qwen3.5 Flash?

Claude Sonnet 4.6 is ahead overall on BenchLM right now.

### Where is the biggest gap between Claude Sonnet 4.6 and Qwen3.5 Flash?

The widest category gap is in coding, where the averages are 47 for Claude Sonnet 4.6 and 26.5 for Qwen3.5 Flash.

### How many benchmarks does Claude Sonnet 4.6 cover on BenchLM?

Claude Sonnet 4.6 currently has 26 sourced benchmark scores on BenchLM.

### How many benchmarks does Qwen3.5 Flash cover on BenchLM?

Qwen3.5 Flash currently has 6 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Sonnet 4.6 vs GPT-6 Astra](/compare/claude-sonnet-4-6-vs-gpt-6-astra)
- [Qwen3.5 Flash vs GPT-6 Astra](/compare/gpt-6-astra-vs-qwen3-5-flash)
- [Claude Sonnet 4.6 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-claude-sonnet-4-6)
- [Qwen3.5 Flash vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-qwen3-5-flash)

## Explore More

- [Claude Sonnet 4.6 profile](/models/claude-sonnet-4-6)
- [Qwen3.5 Flash profile](/models/qwen3-5-flash)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)