# Claude Sonnet 5 vs Qwen3.8-Flash-Next

> Side-by-side benchmark comparison for Claude Sonnet 5 and Qwen3.8-Flash-Next across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-sonnet-5-vs-qwen3-8-flash-next
- Last updated: September 21, 2026

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

## Quick Verdict

Pick Claude Sonnet 5 if you want the stronger benchmark profile. Qwen3.8-Flash-Next only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Claude Sonnet 5 leads overall 69.62 to 56.9.
- The clearest category separation is in knowledge, where the averages are 66.5 for Claude Sonnet 5 and 55.2 for Qwen3.8-Flash-Next.
- The biggest single benchmark swing is HLE in Knowledge, with scores of 57.4% and 35.9%.
- Qwen3.8-Flash-Next is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Claude Sonnet 5 also has the larger context window at 1M.

## Model Snapshot

| Property | Claude Sonnet 5 | Qwen3.8-Flash-Next |
|----------|----------|----------|
| Creator | Anthropic | Alibaba |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 262K |
| Overall Score | 69.62 | 56.9 |
| Benchmarks Covered | 26 | 24 |
| Pricing (input/output) | $2.00 / $10.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Coming soon
- Claude Sonnet 5 public-lane score: 66.2 (Supported · #11/154)
- Qwen3.8-Flash-Next public-lane score: 58.9 (Estimated · #29/154)

| Benchmark | Claude Sonnet 5 | Qwen3.8-Flash-Next | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 14.6% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 80.4% | Coming soon | Coming soon |
| BrowseComp | 84.7% | Coming soon | Coming soon |
| HLE w/ tools | 57.4% | Coming soon | Coming soon |
| OSWorld-Verified | 81.2% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 74.5% | Coming soon | Coming soon |
| ApprenticeBench | 16% | Coming soon | Coming soon |
| CoWorkBench | Coming soon | 73.9% | Coming soon |
| JobBench | Coming soon | 55.7% | Coming soon |
| Agents' Last Exam | Coming soon | 51.2% | Coming soon |
| Toolathlon-Verified | Coming soon | 73.5% | Coming soon |
| AndroidWorld | Coming soon | 84.5% | Coming soon |
| OSWorld 2.0 | Coming soon | 19.4% | Coming soon |

### Coding

- Winner: Claude Sonnet 5
- Claude Sonnet 5 public-lane score: 63.8 (Supported · #13/154)
- Qwen3.8-Flash-Next public-lane score: 57.8 (Supported · #30/154)

| Benchmark | Claude Sonnet 5 | Qwen3.8-Flash-Next | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 85.2% | Coming soon | Coming soon |
| SWE-bench Pro | 63.2% | 62.5% | Claude Sonnet 5 |
| SWE Multilingual | 78.3% | 81% | Qwen3.8-Flash-Next |
| SWE Multimodal | 28.1% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 80.4% | Coming soon | Coming soon |
| FrontierCode 1.1 Main | 42.7% | Coming soon | Coming soon |
| cursorBench32 | 61.5% | Coming soon | Coming soon |
| VulcanBench CII v1 | 89.2% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 82.4% | Coming soon | Coming soon |
| SWE-bench (Vals) | 79.6% | Coming soon | Coming soon |
| cursorBench40 | 34.1% | Coming soon | Coming soon |
| NL2Repo | Coming soon | 48.1% | Coming soon |
| DeepSWE | Coming soon | 58.7% | Coming soon |
| LiveCodeBench v6 | Coming soon | 91.9% | Coming soon |

### Reasoning

- Winner: Coming soon
- Claude Sonnet 5 public-lane score: 77.4 (Unranked · 2 rankable rows)
- Qwen3.8-Flash-Next public-lane score: 75.8 (Unranked · 2 rankable rows)

### Multimodal & Grounded

- Winner: Qwen3.8-Flash-Next
- Claude Sonnet 5 public-lane score: 77.4 (#14/49)
- Qwen3.8-Flash-Next public-lane score: 83.1 (#7/49)

| Benchmark | Claude Sonnet 5 | Qwen3.8-Flash-Next | Winner |
|-----------|-----------|-----------|--------|
| CharXiv | 88.3% | 90.6% | Qwen3.8-Flash-Next |
| CharXiv w/o tools | 77% | 84.6% | Qwen3.8-Flash-Next |
| Vision2Web | Coming soon | 64.0% | Coming soon |
| ERQA | Coming soon | 72.3% | Coming soon |
| LVBench | Coming soon | 76.6% | Coming soon |
| RealWorldQA | Coming soon | 88.5% | Coming soon |
| MathVision | Coming soon | 90.6% | Coming soon |
| MathVision w/ Python | Coming soon | 95.7% | Coming soon |

### Knowledge

- Winner: Claude Sonnet 5
- Claude Sonnet 5 public-lane score: 66.5 (Supported · #20/184)
- Qwen3.8-Flash-Next public-lane score: 55.2 (Supported · #53/184)

| Benchmark | Claude Sonnet 5 | Qwen3.8-Flash-Next | Winner |
|-----------|-----------|-----------|--------|
| HLE | 57.4% | 35.9% | Claude Sonnet 5 |
| HLE w/o tools | 43.2% | 35.9% | Claude Sonnet 5 |
| HLE-Verified | 31.0% | Coming soon | Coming soon |
| LABBench2 | 80.1% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 88.9% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 87.5% | Coming soon | Coming soon |
| GPQA | Coming soon | 91.7% | Coming soon |
| GPQA-D | Coming soon | 91.7% | Coming soon |

### Instruction Following

- Winner: Coming soon
- Claude Sonnet 5 public-lane score: Coming soon
- Qwen3.8-Flash-Next public-lane score: 87.2 (#33/124)

| Benchmark | Claude Sonnet 5 | Qwen3.8-Flash-Next | Winner |
|-----------|-----------|-----------|--------|
| IFBench | Coming soon | 81.3% | Coming soon |

## FAQ

### Which is better overall, Claude Sonnet 5 or Qwen3.8-Flash-Next?

Claude Sonnet 5 is ahead overall on BenchLM right now.

### Where is the biggest gap between Claude Sonnet 5 and Qwen3.8-Flash-Next?

The widest category gap is in knowledge, where the averages are 66.5 for Claude Sonnet 5 and 55.2 for Qwen3.8-Flash-Next.

### How many benchmarks does Claude Sonnet 5 cover on BenchLM?

Claude Sonnet 5 currently has 26 sourced benchmark scores on BenchLM.

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

Qwen3.8-Flash-Next currently has 24 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Sonnet 5 vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-claude-sonnet-5)
- [Qwen3.8-Flash-Next vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-qwen3-8-flash-next)
- [Claude Sonnet 5 vs GPT-6 Astra](/compare/claude-sonnet-5-vs-gpt-6-astra)
- [Qwen3.8-Flash-Next vs GPT-6 Astra](/compare/gpt-6-astra-vs-qwen3-8-flash-next)

## Explore More

- [Claude Sonnet 5 profile](/models/claude-sonnet-5)
- [Qwen3.8-Flash-Next profile](/models/qwen3-8-flash-next)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)