Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
Composer 2
~62
1/8 categoriesQwen3.5-27B
71
Winner · 0/8 categoriesComposer 2· Qwen3.5-27B
Pick Qwen3.5-27B if you want the stronger benchmark profile. Composer 2 only becomes the better choice if agentic is the priority.
Qwen3.5-27B is clearly ahead on the aggregate, 71 to 62. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Composer 2 is also the more expensive model on tokens at $0.50 input / $2.50 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for Qwen3.5-27B. That is roughly Infinityx on output cost alone. Qwen3.5-27B gives you the larger context window at 262K, compared with 200K for Composer 2.
BenchLM keeps the benchmark table and the operator tradeoffs on the same page so a better score does not hide a materially slower, pricier, or smaller-context model.
Runtime metrics show N/A when BenchLM does not have a sourced snapshot for that exact model. The scoring rules and freshness policy are documented on the methodology page.
| Benchmark | Composer 2 | Qwen3.5-27B |
|---|---|---|
| AgenticComposer 2 wins | ||
| Terminal-Bench 2.0 | 61.7% | 41.6% |
| BrowseComp | — | 61% |
| OSWorld-Verified | — | 56.2% |
| tau2-bench | — | 79% |
| Coding | ||
| SWE Multilingual | 73.7% | — |
| React Native Evals | 96.2% | — |
| SWE-bench Verified | — | 72.4% |
| LiveCodeBench | — | 80.7% |
| Multimodal & Grounded | ||
| MMMU-Pro | — | 75% |
| Reasoning | ||
| LongBench v2 | — | 60.6% |
| Knowledge | ||
| MMLU-Pro | — | 86.1% |
| SuperGPQA | — | 65.6% |
| GPQA | — | 85.5% |
| Instruction Following | ||
| IFEval | — | 95% |
| Multilingual | ||
| MMLU-ProX | — | 82.2% |
| Mathematics | ||
| Coming soon | ||
Qwen3.5-27B is ahead overall, 71 to 62. The biggest single separator in this matchup is Terminal-Bench 2.0, where the scores are 61.7% and 41.6%.
Composer 2 has the edge for agentic tasks in this comparison, averaging 61.7 versus 51.6. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
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