# Claude Opus 4.5 vs Qwen3.5-27B

> Side-by-side benchmark comparison for Claude Opus 4.5 and Qwen3.5-27B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-opus-4-5-vs-qwen3-5-27b
- Last updated: September 28, 2026

- Shared sourced benchmarks: 12
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

Pick Claude Opus 4.5 if you want the stronger benchmark profile. Qwen3.5-27B only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Claude Opus 4.5 leads overall 55.03 to 43.76.
- The clearest category separation is in instruction following, where the averages are 30.6 for Claude Opus 4.5 and 91.5 for Qwen3.5-27B.
- The biggest single benchmark swing is V* in Multimodal & Grounded, with scores of 67.0% and 93.7%.
- Qwen3.5-27B is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Qwen3.5-27B also has the larger context window at 262K.

## Model Snapshot

| Property | Claude Opus 4.5 | Qwen3.5-27B |
|----------|----------|----------|
| Creator | Anthropic | Alibaba |
| Type | Proprietary | Open Weight |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 200K | 262K |
| Overall Score | 55.03 | 43.76 |
| Benchmarks Covered | 45 | 16 |
| Pricing (input/output) | $5.00 / $25.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 31.1 (Estimated · #78/117)
- Qwen3.5-27B public-lane score: 32.5 (Estimated · #74/117)

| Benchmark | Claude Opus 4.5 | Qwen3.5-27B | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 59.3% | 41.6% | Claude Opus 4.5 |
| OSWorld-Verified | 66.3% | 56.2% | Claude Opus 4.5 |
| OSWorld | 66.3% | Coming soon | Coming soon |
| Claw-Eval | 59.6% | Coming soon | Coming soon |
| QwenClawBench | 52.3% | Coming soon | Coming soon |
| τ³-bench results | 70.2% | Coming soon | Coming soon |
| VITA-Bench | 23.3% | Coming soon | Coming soon |
| DeepPlanning | 26.4% | Coming soon | Coming soon |
| Toolathlon | 43.5% | Coming soon | Coming soon |
| MCP Atlas | 42.3% | Coming soon | Coming soon |
| MCP-Tasks | 71.8% | Coming soon | Coming soon |
| WideResearch | 76.4% | Coming soon | Coming soon |
| CyberGym | 50.6% | Coming soon | Coming soon |
| Gert Labs | 64.23% | 39.41% | Claude Opus 4.5 |
| JobBench | 32.3% | Coming soon | Coming soon |
| BrowseComp | Coming soon | 61% | Coming soon |

### Coding

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 42.3 (Estimated · #56/142)
- Qwen3.5-27B public-lane score: 32.4 (Estimated · #86/142)

| Benchmark | Claude Opus 4.5 | Qwen3.5-27B | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 80.9% | 72.4% | Claude Opus 4.5 |
| LiveCodeBench v6 | 84.8% | Coming soon | Coming soon |
| SWE-bench Pro | 57.1% | Coming soon | Coming soon |
| SWE Multilingual | 77.5% | Coming soon | Coming soon |
| NL2Repo | 43.2% | Coming soon | Coming soon |
| SWE-Rebench | Coming soon | 58.9% | Coming soon |

### Reasoning

- Winner: Not comparable
- Claude Opus 4.5 public-lane score: 73.3 (Unranked · 4 rankable rows)
- Qwen3.5-27B public-lane score: 52.7 (Unranked · 3 rankable rows)

| Benchmark | Claude Opus 4.5 | Qwen3.5-27B | Winner |
|-----------|-----------|-----------|--------|
| LongBench v2 | 64.4% | 60.6% | Claude Opus 4.5 |
| AI-Needle | 74% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Claude Opus 4.5 public-lane score: 24.5 (#48/50)
- Qwen3.5-27B public-lane score: 71.6 (Unranked · 3 rankable rows)

| Benchmark | Claude Opus 4.5 | Qwen3.5-27B | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 70.6% | Coming soon | Coming soon |
| MathVision | 74.3% | 86.0% | Qwen3.5-27B |
| CharXiv | 68.5% | Coming soon | Coming soon |
| VideoMMMU | 84.4% | Coming soon | Coming soon |
| ScreenSpot Pro | 45.7% | Coming soon | Coming soon |
| V* | 67.0% | 93.7% | Qwen3.5-27B |
| MMMU | Coming soon | 82.3% | Coming soon |
| MMVU | Coming soon | 73.3% | Coming soon |

### Knowledge

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 49.5 (Estimated · #61/168)
- Qwen3.5-27B public-lane score: 42.3 (Supported · #87/168)

| Benchmark | Claude Opus 4.5 | Qwen3.5-27B | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 87% | 85.5% | Claude Opus 4.5 |
| SuperGPQA | 70.6% | 65.6% | Claude Opus 4.5 |
| MMLU-Pro | 89.5% | 86.1% | Claude Opus 4.5 |
| MMLU-Redux | 96.6% | Coming soon | Coming soon |
| C-Eval | 92.2% | Coming soon | Coming soon |
| HLE | 30.8% | Coming soon | Coming soon |

### Multilingual

- Winner: Claude Opus 4.5
- Claude Opus 4.5 public-lane score: 82.9 (#2/12)
- Qwen3.5-27B public-lane score: 36.8 (#9/12)

| Benchmark | Claude Opus 4.5 | Qwen3.5-27B | Winner |
|-----------|-----------|-----------|--------|
| MMLU-ProX | 85.7% | 82.2% | Claude Opus 4.5 |
| NOVA-63 | 56.7% | Coming soon | Coming soon |

### Instruction Following

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 30.6 (#114/124)
- Qwen3.5-27B public-lane score: 91.5 (#13/124)

| Benchmark | Claude Opus 4.5 | Qwen3.5-27B | Winner |
|-----------|-----------|-----------|--------|
| IFEval | 90.9% | 95% | Qwen3.5-27B |
| IFBench | 58% | Coming soon | Coming soon |

### Mathematics

- Winner: Not comparable
- Claude Opus 4.5 public-lane score: 57.9 (#6/7)
- Qwen3.5-27B public-lane score: Coming soon

| Benchmark | Claude Opus 4.5 | Qwen3.5-27B | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | 95.1% | Coming soon | Coming soon |
| HMMT Feb 2025 | 92.9% | Coming soon | Coming soon |
| HMMT Nov 2025 | 93.3% | Coming soon | Coming soon |
| HMMT Feb 2026 | 85.3% | Coming soon | Coming soon |
| MMAnswerBench | 84.0% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 20.690% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 4.167% | Coming soon | Coming soon |

## FAQ

### Which is better overall, Claude Opus 4.5 or Qwen3.5-27B?

Claude Opus 4.5 is ahead overall on BenchLM right now.

### Where is the biggest gap between Claude Opus 4.5 and Qwen3.5-27B?

The widest category gap is in instruction following, where the averages are 30.6 for Claude Opus 4.5 and 91.5 for Qwen3.5-27B.

### How many benchmarks does Claude Opus 4.5 cover on BenchLM?

Claude Opus 4.5 currently has 45 sourced benchmark scores on BenchLM.

### How many benchmarks does Qwen3.5-27B cover on BenchLM?

Qwen3.5-27B currently has 16 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Opus 4.5 vs Claude Opus 4.5 Thinking](/compare/claude-opus-4-5-vs-claude-opus-4-5-thinking)
- [Qwen3.5-27B vs Claude Opus 4.5 Thinking](/compare/claude-opus-4-5-thinking-vs-qwen3-5-27b)
- [Claude Opus 4.5 vs GPT-6 Astra](/compare/claude-opus-4-5-vs-gpt-6-astra)
- [Qwen3.5-27B vs GPT-6 Astra](/compare/gpt-6-astra-vs-qwen3-5-27b)

## Explore More

- [Claude Opus 4.5 profile](/models/claude-opus-4-5)
- [Qwen3.5-27B profile](/models/qwen3-5-27b)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)