Model comparison
Claude Opus 4 vs Qwen3.5 Plus
Claude Opus 4 and Qwen3.5 Plus score almost the same on the Noometry Index (43.1 vs 42.9), so choose on price, context window or the category you care about most.
Last verified . 8 shared benchmarks.
Alibaba (Qwen)Summary
- They share 8 benchmarks with published results for both. Claude Opus 4 scores higher in 0 categories and Qwen3.5 Plus in 4 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in math, where Qwen3.5 Plus leads 49.6 to 42.0.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 64.4% for Claude Opus 4 and 86.7% for Qwen3.5 Plus.
- Qwen3.5 Plus is cheaper at $0.40 / $2.40 per million input/output tokens, against $15 / $75 for Claude Opus 4.
- Qwen3.5 Plus accepts more context: 1M tokens versus 200K.
Side by side
| Claude Opus 4 | Qwen3.5 Plus | |
|---|---|---|
| Provider | Anthropic | Alibaba (Qwen) |
| Noometry Index | 43.1 | 42.9 |
| Released | 2025-05-22 | 2026-02-16 |
| Weights | Proprietary | Proprietary |
| Context window | 200K | 1M |
| Max output | 32K | 66K |
| Input $ / M tokens | $15 | $0.40 |
| Output $ / M tokens | $75 | $2.40 |
| Results tracked | 56 | 15 |
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Category by category
Coding Not comparable
Claude Opus 4: 47.2 (#62), Qwen3.5 Plus: —
| Benchmark | Claude Opus 4 | Qwen3.5 Plus |
|---|---|---|
| SWE-bench Verified | 70.7% | — |
| SWE-bench Verified (bash only) | 67.6% | — |
| Aider Polyglot | 72% | — |
| GSO | 6.9% | — |
| WeirdML | 43.7% | — |
| LMArena Coding | 1442 | — |
| ALE-Bench | — | 621.92 |
| AlgoTune | 1.33 | — |
Agentic & Tool Use Not comparable
Claude Opus 4: 34.8 (#42), Qwen3.5 Plus: —
| Benchmark | Claude Opus 4 | Qwen3.5 Plus |
|---|---|---|
| Cybench | 38% | — |
| DeepResearch Bench | 46.8% | — |
| LMArena Search | 1127 | — |
| METR Time Horizons | 63.9% | — |
| Vending-Bench 2 | — | 0.54 |
Reasoning Qwen3.5 Plus leads
Claude Opus 4: 27.3 (#121), Qwen3.5 Plus: 32.8 (#74)
| Benchmark | Claude Opus 4 | Qwen3.5 Plus |
|---|---|---|
| DTBench | 81.6% | 80.5% |
| LMCA | 37.4% | 36.4% |
| Epoch Capabilities Index | 142.67 | 146.78 |
| ARC-AGI-2 | 8.6% | — |
| SimpleBench | 58.8% | — |
| Kagi LLM Benchmark | 74.3% | — |
| ARC-AGI-1 | 35.7% | — |
| CritPt | 0.3% | — |
| Chess Puzzles | — | 22% |
| EnigmaEval | 5.6% | — |
| LMArena Hard Prompts | 1399 | — |
| Mystery Game Puzzles | — | 17% |
| ForecastBench | 61.1 | — |
Math Qwen3.5 Plus leads
Claude Opus 4: 42.0 (#86), Qwen3.5 Plus: 49.6 (#61)
| Benchmark | Claude Opus 4 | Qwen3.5 Plus |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 64.4% | 86.7% |
| FrontierMath (Feb 2025 set) | 4.5% | 21% |
| FrontierMath Tier 4 (v1) | 4.2% | 2.1% |
| Omni-MATH | 61.6% | — |
| LMArena Math | 1390 | — |
| MATH Level 5 | 85% | — |
Knowledge Qwen3.5 Plus leads
Claude Opus 4: 44.0 (#88), Qwen3.5 Plus: 46.0 (#83)
| Benchmark | Claude Opus 4 | Qwen3.5 Plus |
|---|---|---|
| GPQA Diamond | 76.3% | 84.8% |
| Vectara Hallucination Rate | 12% | 10.7% |
| Humanity's Last Exam | 10.7% | — |
| SimpleQA Verified | — | 25.4% |
| MMLU-Pro | 87.5% | — |
| Confabulations | 15.9% | — |
| GPQA (HELM) | 70.8% | — |
| LMArena Expert | 1386 | — |
Multimodal Not comparable
Claude Opus 4: 31.5 (#106), Qwen3.5 Plus: —
| Benchmark | Claude Opus 4 | Qwen3.5 Plus |
|---|---|---|
| LMArena Vision | 1192 | — |
| GeoBench | 49% | — |
| VPCT | 38% | — |
Multilingual Not comparable
Claude Opus 4: 48.8 (#138), Qwen3.5 Plus: —
| Benchmark | Claude Opus 4 | Qwen3.5 Plus |
|---|---|---|
| LMArena Non-English | 1362 | — |
| LMArena Chinese | 1386 | — |
| LMArena French | 1372 | — |
| LMArena German | 1391 | — |
| LMArena Japanese | 1331 | — |
| LMArena Korean | 1321 | — |
| LMArena Russian | 1392 | — |
| LMArena Spanish | 1389 | — |
Instruction Following Not comparable
Claude Opus 4: 77.1 (#28), Qwen3.5 Plus: —
| Benchmark | Claude Opus 4 | Qwen3.5 Plus |
|---|---|---|
| IFEval | 91.8% | — |
| LMArena Instruction Following | 1406 | — |
Long Context Qwen3.5 Plus leads
Claude Opus 4: 39.6 (#172), Qwen3.5 Plus: 43.0 (#113)
| Benchmark | Claude Opus 4 | Qwen3.5 Plus |
|---|---|---|
| Fiction.LiveBench | 61.1% | — |
| CL-bench | — | 19.8% |
| CL-bench Life | — | 12.4% |
| LMArena Longer Query | 1422 | — |
Writing & Preference Not comparable
Claude Opus 4: 61.2 (#89), Qwen3.5 Plus: —
| Benchmark | Claude Opus 4 | Qwen3.5 Plus |
|---|---|---|
| LMArena Text | 1377 | — |
| LMArena Creative Writing | 1387 | — |
| Short-Story Creative Writing | 83.6% | — |
| EQ-Bench Creative Writing | 1580 | — |
| WildBench | 85.2% | — |
| LMArena Multi-Turn | 1396 | — |
Frequently asked questions
Is Claude Opus 4 better than Qwen3.5 Plus?
Claude Opus 4 and Qwen3.5 Plus score almost the same on the Noometry Index (43.1 vs 42.9), so choose on price, context window or the category you care about most.
Which is cheaper, Claude Opus 4 or Qwen3.5 Plus?
Qwen3.5 Plus is cheaper. It lists at $0.40 per million input tokens and $2.40 per million output tokens; Claude Opus 4 lists at $15 and $75.
Which has the bigger context window?
Qwen3.5 Plus does, with 1M tokens against 200K.
How many benchmarks do Claude Opus 4 and Qwen3.5 Plus share?
8 benchmarks have published results for both models. Claude Opus 4 has 56 scored results on Noometry and Qwen3.5 Plus has 15.