Model comparison
Claude Sonnet 5.5 vs Qwen Plus
Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 37.1 on the Noometry Index. Qwen Plus costs 6.7× less per token, which makes it the better buy when Claude Sonnet 5.5's lead doesn't matter for your workload.
Last verified . 14 shared benchmarks.
Alibaba (Qwen)Summary
- They share 14 benchmarks with published results for both. Claude Sonnet 5.5 scores higher in 8 categories and Qwen Plus in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Sonnet 5.5 leads 87.9 to 23.3.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 100% for Claude Sonnet 5.5 and 17.8% for Qwen Plus.
- Qwen Plus is cheaper at $0.40 / $1.20 per million input/output tokens, against $2 / $10 for Claude Sonnet 5.5.
Side by side
| Claude Sonnet 5.5 | Qwen Plus | |
|---|---|---|
| Provider | Anthropic | Alibaba (Qwen) |
| Noometry Index | 61.9 | 37.1 |
| Released | 2026-09-28 | 2024-01-25 |
| Weights | Proprietary | Proprietary |
| Context window | 1M | 1M |
| Max output | 128K | 33K |
| Input $ / M tokens | $2 | $0.40 |
| Output $ / M tokens | $10 | $1.20 |
| Results tracked | 32 | 20 |
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Category by category
Coding Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 67.3 (#6), Qwen Plus: 38.9 (#167)
| Benchmark | Claude Sonnet 5.5 | Qwen Plus |
|---|---|---|
| LMArena Coding | 1513 | 1328 |
| FrontierCode | 52.1% | — |
| CursorBench | 55.5% | — |
| LMArena WebDev | 1774 | — |
| FrontierSWE | 61.9% | — |
| SciCode | 61% | — |
| ALE-Bench | 1,819 | — |
Agentic & Tool Use Not comparable
Claude Sonnet 5.5: 45.0 (#16), Qwen Plus: —
| Benchmark | Claude Sonnet 5.5 | Qwen Plus |
|---|---|---|
| APEX-Agents | 75.5% | — |
Reasoning Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 54.0 (#28), Qwen Plus: 28.4 (#107)
| Benchmark | Claude Sonnet 5.5 | Qwen Plus |
|---|---|---|
| LMArena Hard Prompts | 1495 | 1317 |
| Kagi LLM Benchmark | — | 63.3% |
| NYT Connections (extended) | 80.5% | — |
| CritPt | 31.4% | — |
| Mystery Game Puzzles | 65% | — |
| DTBench | — | 81.1% |
| LMCA | — | 24% |
| Epoch Capabilities Index | 165.03 | — |
Math Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 87.9 (#6), Qwen Plus: 23.3 (#271)
| Benchmark | Claude Sonnet 5.5 | Qwen Plus |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 100% | 17.8% |
| LMArena Math | 1510 | 1326 |
| FrontierMath (Tiers 1-3) | 88.8% | — |
| FrontierMath Tier 4 | 80.5% | — |
| ProofBench | 100% | — |
| MATH Level 5 | — | 65.3% |
| FrontierMath (Feb 2025 set) | — | 1.7% |
| FrontierMath Erdős | 2.9% | — |
Knowledge Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 66.0 (#12), Qwen Plus: 27.4 (#251)
| Benchmark | Claude Sonnet 5.5 | Qwen Plus |
|---|---|---|
| GPQA Diamond | 95.6% | 48.1% |
| LMArena Expert | 1540 | 1328 |
| SimpleQA Verified | 46.5% | — |
Multimodal Not comparable
Claude Sonnet 5.5: 51.5 (#6), Qwen Plus: —
| Benchmark | Claude Sonnet 5.5 | Qwen Plus |
|---|---|---|
| LMArena Vision | 1289 | — |
| Furniture Assembly | 75% | — |
Multilingual Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 55.3 (#30), Qwen Plus: 45.1 (#175)
| Benchmark | Claude Sonnet 5.5 | Qwen Plus |
|---|---|---|
| LMArena Non-English | 1452 | 1310 |
| LMArena Chinese | 1522 | 1347 |
| LMArena Russian | 1451 | 1323 |
| LMArena Japanese | — | 1251 |
Instruction Following Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 78.3 (#11), Qwen Plus: 68.8 (#181)
| Benchmark | Claude Sonnet 5.5 | Qwen Plus |
|---|---|---|
| LMArena Instruction Following | 1495 | 1303 |
Long Context Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 45.9 (#28), Qwen Plus: 40.3 (#158)
| Benchmark | Claude Sonnet 5.5 | Qwen Plus |
|---|---|---|
| LMArena Longer Query | 1498 | 1324 |
Writing & Preference Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 66.0 (#40), Qwen Plus: 52.2 (#176)
| Benchmark | Claude Sonnet 5.5 | Qwen Plus |
|---|---|---|
| LMArena Text | 1471 | 1326 |
| LMArena Creative Writing | 1465 | 1293 |
| LMArena Multi-Turn | 1474 | 1336 |
Frequently asked questions
Is Claude Sonnet 5.5 better than Qwen Plus?
Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 37.1 on the Noometry Index. Qwen Plus costs 6.7× less per token, which makes it the better buy when Claude Sonnet 5.5's lead doesn't matter for your workload.
Which is cheaper, Claude Sonnet 5.5 or Qwen Plus?
Qwen Plus is cheaper. It lists at $0.40 per million input tokens and $1.20 per million output tokens; Claude Sonnet 5.5 lists at $2 and $10.
Is Claude Sonnet 5.5 or Qwen Plus better for coding?
Claude Sonnet 5.5 scores higher on coding benchmarks: 67.3 versus 38.9 in the Noometry coding category.
Which has the bigger context window?
Both accept 1M tokens.
How many benchmarks do Claude Sonnet 5.5 and Qwen Plus share?
14 benchmarks have published results for both models. Claude Sonnet 5.5 has 32 scored results on Noometry and Qwen Plus has 20.