# Claude Opus 4.5 vs Qwen3.8-27B

> Side-by-side benchmark comparison for Claude Opus 4.5 and Qwen3.8-27B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-opus-4-5-vs-qwen3-8-27b
- Last updated: September 28, 2026

- Shared sourced benchmarks: 10
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

Pick Qwen3.8-27B if you want the stronger benchmark profile. Claude Opus 4.5 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Qwen3.8-27B leads overall 55.26 to 55.03.
- The clearest category separation is in multimodal & grounded, where the averages are 24.5 for Claude Opus 4.5 and 80.9 for Qwen3.8-27B.
- The biggest single benchmark swing is CharXiv in Multimodal & Grounded, with scores of 68.5% and 90.2%.
- Qwen3.8-27B is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Qwen3.8-27B also has the larger context window at 262K.

## Model Snapshot

| Property | Claude Opus 4.5 | Qwen3.8-27B |
|----------|----------|----------|
| Creator | Anthropic | Alibaba |
| Type | Proprietary | Open Weight |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 200K | 262K |
| Overall Score | 55.03 | 55.26 |
| Benchmarks Covered | 45 | 33 |
| 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)
- Qwen3.8-27B public-lane score: 61.2 (Supported · #18/117)

| Benchmark | Claude Opus 4.5 | Qwen3.8-27B | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 59.3% | Coming soon | Coming soon |
| OSWorld-Verified | 66.3% | 84.3% | Qwen3.8-27B |
| 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% | Coming soon | Coming soon |
| JobBench | 32.3% | 33.4% | Qwen3.8-27B |
| Terminal-Bench 2.1 | Coming soon | 73.0% | Coming soon |
| CoWorkBench | Coming soon | 70.7% | Coming soon |
| Agents' Last Exam | Coming soon | 42.9% | Coming soon |
| WebArena-Verified | Coming soon | 64.8% | Coming soon |
| AndroidWorld | Coming soon | 81.9% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 58.4% | Coming soon |

### Coding

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 42.3 (Estimated · #56/142)
- Qwen3.8-27B public-lane score: 48.7 (Supported · #45/142)

| Benchmark | Claude Opus 4.5 | Qwen3.8-27B | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 80.9% | Coming soon | Coming soon |
| LiveCodeBench v6 | 84.8% | 90.3% | Qwen3.8-27B |
| SWE-bench Pro | 57.1% | 61.7% | Qwen3.8-27B |
| SWE Multilingual | 77.5% | Coming soon | Coming soon |
| NL2Repo | 43.2% | 42.3% | Claude Opus 4.5 |
| Terminal-Bench 2.1 | Coming soon | 73.0% | Coming soon |
| DeepSWE | Coming soon | 42.2% | Coming soon |
| VulcanBench v3 | Coming soon | 82.6% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 84.0% | Coming soon |
| SWE-bench (Vals) | Coming soon | 86.0% | Coming soon |

### Reasoning

- Winner: Not comparable
- Claude Opus 4.5 public-lane score: 73.3 (Unranked · 4 rankable rows)
- Qwen3.8-27B public-lane score: 78.7 (#8/27)

| Benchmark | Claude Opus 4.5 | Qwen3.8-27B | Winner |
|-----------|-----------|-----------|--------|
| LongBench v2 | 64.4% | Coming soon | Coming soon |
| AI-Needle | 74% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 24.5 (#48/50)
- Qwen3.8-27B public-lane score: 80.9 (#11/50)

| Benchmark | Claude Opus 4.5 | Qwen3.8-27B | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 70.6% | Coming soon | Coming soon |
| MathVision | 74.3% | 90.0% | Qwen3.8-27B |
| CharXiv | 68.5% | 90.2% | Qwen3.8-27B |
| VideoMMMU | 84.4% | Coming soon | Coming soon |
| ScreenSpot Pro | 45.7% | Coming soon | Coming soon |
| V* | 67.0% | Coming soon | Coming soon |
| MathVision w/ Python | Coming soon | 94.6% | Coming soon |
| BabyVision | Coming soon | 65.7% | Coming soon |
| BabyVision w/ Python | Coming soon | 85.6% | Coming soon |
| Vision2Web | Coming soon | 62.9% | Coming soon |
| CharXiv w/o tools | Coming soon | 83.7% | Coming soon |
| OmniDocBench 1.5 | Coming soon | 91.1% | Coming soon |
| RealWorldQA | Coming soon | 85.9% | Coming soon |
| ERQA | Coming soon | 65.5% | Coming soon |

### Knowledge

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 49.5 (Estimated · #61/168)
- Qwen3.8-27B public-lane score: 49.2 (Supported · #63/168)

| Benchmark | Claude Opus 4.5 | Qwen3.8-27B | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 87% | 89.2% | Qwen3.8-27B |
| SuperGPQA | 70.6% | Coming soon | Coming soon |
| MMLU-Pro | 89.5% | Coming soon | Coming soon |
| MMLU-Redux | 96.6% | Coming soon | Coming soon |
| C-Eval | 92.2% | Coming soon | Coming soon |
| HLE | 30.8% | 30.8% | Tie |
| GPQA-D | Coming soon | 89.2% | Coming soon |
| HLE w/o tools | Coming soon | 30.8% | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 88.9% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 84.3% | Coming soon |

### Multilingual

- Winner: Not comparable
- Claude Opus 4.5 public-lane score: 82.9 (#2/12)
- Qwen3.8-27B public-lane score: Coming soon

| Benchmark | Claude Opus 4.5 | Qwen3.8-27B | Winner |
|-----------|-----------|-----------|--------|
| MMLU-ProX | 85.7% | Coming soon | Coming soon |
| NOVA-63 | 56.7% | Coming soon | Coming soon |

### Instruction Following

- Winner: Qwen3.8-27B
- Claude Opus 4.5 public-lane score: 30.6 (#114/124)
- Qwen3.8-27B public-lane score: 83.2 (#45/124)

| Benchmark | Claude Opus 4.5 | Qwen3.8-27B | Winner |
|-----------|-----------|-----------|--------|
| IFEval | 90.9% | Coming soon | Coming soon |
| IFBench | 58% | 79.5% | Qwen3.8-27B |

### Mathematics

- Winner: Not comparable
- Claude Opus 4.5 public-lane score: 57.9 (#6/7)
- Qwen3.8-27B public-lane score: Coming soon

| Benchmark | Claude Opus 4.5 | Qwen3.8-27B | 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 Qwen3.8-27B?

Qwen3.8-27B is ahead overall on BenchLM right now.

### Where is the biggest gap between Claude Opus 4.5 and Qwen3.8-27B?

The widest category gap is in multimodal & grounded, where the averages are 24.5 for Claude Opus 4.5 and 80.9 for Qwen3.8-27B.

### 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 Qwen3.8-27B cover on BenchLM?

Qwen3.8-27B currently has 33 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)
- [Qwen3.8-27B vs Claude Opus 4.5 Thinking](/compare/claude-opus-4-5-thinking-vs-qwen3-8-27b)
- [Claude Opus 4.5 vs GPT-6 Astra](/compare/claude-opus-4-5-vs-gpt-6-astra)
- [Qwen3.8-27B vs GPT-6 Astra](/compare/gpt-6-astra-vs-qwen3-8-27b)

## Explore More

- [Claude Opus 4.5 profile](/models/claude-opus-4-5)
- [Qwen3.8-27B profile](/models/qwen3-8-27b)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)