Model comparison
Claude Sonnet 4.6 vs Qwen2.5 Plus 1127
Claude Sonnet 4.6 is the stronger model overall, scoring 50.3 to 38.8 on the Noometry Index.
Last verified . 14 shared benchmarks.
Alibaba (Qwen)Summary
- They share 14 benchmarks with published results for both. Claude Sonnet 4.6 scores higher in 8 categories and Qwen2.5 Plus 1127 in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Claude Sonnet 4.6 leads 70.2 to 49.4.
Side by side
| Claude Sonnet 4.6 | Qwen2.5 Plus 1127 | |
|---|---|---|
| Provider | Anthropic | Alibaba (Qwen) |
| Noometry Index | 50.3 | 38.8 |
| Released | 2026-02-17 | — |
| Weights | Proprietary | Proprietary |
| Context window | 1M | — |
| Max output | 128K | — |
| Input $ / M tokens | $3 | — |
| Output $ / M tokens | $15 | — |
| Results tracked | 57 | 14 |
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Category by category
Coding Claude Sonnet 4.6 leads
Claude Sonnet 4.6: 46.3 (#67), Qwen2.5 Plus 1127: 38.5 (#175)
| Benchmark | Claude Sonnet 4.6 | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Coding | 1504 | 1314 |
| SWE-bench Verified | 75.2% | — |
| DeepSWE | 29.9% | — |
| FrontierCode | 24.3% | — |
| LMArena WebDev | 1522 | — |
| SciCode | 46.8% | — |
| WeirdML | 66.1% | — |
| ALE-Bench | 1,327 | — |
Agentic & Tool Use Not comparable
Claude Sonnet 4.6: 39.1 (#28), Qwen2.5 Plus 1127: —
| Benchmark | Claude Sonnet 4.6 | Qwen2.5 Plus 1127 |
|---|---|---|
| Terminal-Bench | 53.4% | — |
| APEX-Agents | 43% | — |
| OSWorld 2.0 | 9.3% | — |
| DeepResearch Bench | 54.9% | — |
| OSWorld | 72.1% | — |
| ExploitBench | 23.6% | — |
| GBAEval | 48.8% | — |
| GDP.pdf | 18% | — |
| LMArena Search | 1221 | — |
| Vending-Bench 2 | 7,204 | — |
Reasoning Claude Sonnet 4.6 leads
Claude Sonnet 4.6: 46.1 (#45), Qwen2.5 Plus 1127: 25.9 (#141)
| Benchmark | Claude Sonnet 4.6 | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Hard Prompts | 1484 | 1299 |
| ARC-AGI-2 | 60.4% | — |
| NYT Connections (extended) | 80.9% | — |
| ARC-AGI-1 | 86.5% | — |
| CritPt | 3.1% | — |
| Chess Puzzles | 13% | — |
| Thematic Generalization | 76.3% | — |
| Mystery Game Puzzles | 16% | — |
| DTBench | 89.9% | — |
| LMCA | 46.5% | — |
| Epoch Capabilities Index | 152.24 | — |
| ForecastBench | 62 | — |
Math Claude Sonnet 4.6 leads
Claude Sonnet 4.6: 52.9 (#49), Qwen2.5 Plus 1127: 36.1 (#174)
| Benchmark | Claude Sonnet 4.6 | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Math | 1462 | 1298 |
| OTIS Mock AIME 2024-2025 | 85.8% | — |
| ProofBench | 45% | — |
| FrontierMath (Feb 2025 set) | 32.4% | — |
| FrontierMath Tier 4 (v1) | 8.3% | — |
Knowledge Claude Sonnet 4.6 leads
Claude Sonnet 4.6: 51.7 (#65), Qwen2.5 Plus 1127: 35.5 (#183)
| Benchmark | Claude Sonnet 4.6 | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Expert | 1500 | 1289 |
| GPQA Diamond | 87.4% | — |
| SimpleQA Verified | 35.5% | — |
| Vectara Hallucination Rate | 10.6% | — |
Multimodal Not comparable
Claude Sonnet 4.6: 38.0 (#68), Qwen2.5 Plus 1127: —
| Benchmark | Claude Sonnet 4.6 | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Vision | 1283 | — |
| Blueprint-Bench 2 | 6.7% | — |
| LMArena Document | 1482 | — |
Multilingual Claude Sonnet 4.6 leads
Claude Sonnet 4.6: 54.4 (#41), Qwen2.5 Plus 1127: 41.9 (#201)
| Benchmark | Claude Sonnet 4.6 | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Non-English | 1440 | 1265 |
| LMArena Chinese | 1491 | 1314 |
| LMArena German | 1428 | 1231 |
| LMArena Japanese | 1420 | 1207 |
| LMArena Russian | 1440 | 1271 |
| LMArena French | 1465 | — |
| LMArena Korean | 1411 | — |
| LMArena Spanish | 1464 | — |
Instruction Following Claude Sonnet 4.6 leads
Claude Sonnet 4.6: 77.4 (#25), Qwen2.5 Plus 1127: 67.2 (#199)
| Benchmark | Claude Sonnet 4.6 | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Instruction Following | 1475 | 1275 |
Long Context Claude Sonnet 4.6 leads
Claude Sonnet 4.6: 45.3 (#44), Qwen2.5 Plus 1127: 39.2 (#184)
| Benchmark | Claude Sonnet 4.6 | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Longer Query | 1479 | 1292 |
Writing & Preference Claude Sonnet 4.6 leads
Claude Sonnet 4.6: 70.2 (#22), Qwen2.5 Plus 1127: 49.4 (#192)
| Benchmark | Claude Sonnet 4.6 | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Text | 1458 | 1299 |
| LMArena Creative Writing | 1435 | 1262 |
| LMArena Multi-Turn | 1464 | 1299 |
| EQ-Bench Creative Writing | 1810 | — |
| EQ-Bench 4 | 1207 | — |
Frequently asked questions
Is Claude Sonnet 4.6 better than Qwen2.5 Plus 1127?
Claude Sonnet 4.6 is the stronger model overall, scoring 50.3 to 38.8 on the Noometry Index.
Is Claude Sonnet 4.6 or Qwen2.5 Plus 1127 better for coding?
Claude Sonnet 4.6 scores higher on coding benchmarks: 46.3 versus 38.5 in the Noometry coding category.
How many benchmarks do Claude Sonnet 4.6 and Qwen2.5 Plus 1127 share?
14 benchmarks have published results for both models. Claude Sonnet 4.6 has 57 scored results on Noometry and Qwen2.5 Plus 1127 has 14.