Model comparison
Claude Opus 4.5 vs Qwen1.5 4b Chat
Claude Opus 4.5 is the stronger model overall, scoring 50.5 to 28.3 on the Noometry Index.
Last verified . 13 shared benchmarks.
Alibaba (Qwen)Summary
- They share 13 benchmarks with published results for both. Claude Opus 4.5 scores higher in 8 categories and Qwen1.5 4b Chat in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Claude Opus 4.5 leads 68.2 to 23.9.
- Qwen1.5 4b Chat has downloadable open weights; the other is API-only.
Side by side
| Claude Opus 4.5 | Qwen1.5 4b Chat | |
|---|---|---|
| Provider | Anthropic | Alibaba (Qwen) |
| Noometry Index | 50.5 | 28.3 |
| Released | 2025-11-01 | — |
| Weights | Proprietary | Open |
| Context window | 200K | — |
| Max output | 64K | — |
| Input $ / M tokens | $5 | — |
| Output $ / M tokens | $25 | — |
| Results tracked | 69 | 13 |
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Category by category
Coding Claude Opus 4.5 leads
Claude Opus 4.5: 55.4 (#21), Qwen1.5 4b Chat: 28.6 (#305)
| Benchmark | Claude Opus 4.5 | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Coding | 1504 | 999 |
| SWE-bench Verified | 76.7% | — |
| SWE-bench Verified (bash only) | 76.8% | — |
| LMArena WebDev | 1493 | — |
| SWE-bench Multilingual | 70.7% | — |
| GSO | 26.5% | — |
| WeirdML | 63.7% | — |
| ALE-Bench | 1,025 | — |
| AlgoTune | 1.77 | — |
Agentic & Tool Use Not comparable
Claude Opus 4.5: 47.2 (#11), Qwen1.5 4b Chat: —
| Benchmark | Claude Opus 4.5 | Qwen1.5 4b Chat |
|---|---|---|
| Terminal-Bench | 63.1% | — |
| Berkeley Function Calling Leaderboard | 77.5% | — |
| GDPval | 45.5% | — |
| Remote Labor Index | 3.8% | — |
| τ²-bench Airline | 84% | — |
| τ²-bench Banking | 24.7% | — |
| τ²-bench Retail | 79.6% | — |
| τ²-bench Telecom | 92.3% | — |
| Cybench | 82% | — |
| DeepResearch Bench | 54.8% | — |
| OSWorld | 66.3% | — |
| BALROG | 43.5% | — |
| LMArena Search | 1180 | — |
| METR Time Horizons | 75% | — |
| Vending-Bench 2 | 4,967 | — |
Reasoning Claude Opus 4.5 leads
Claude Opus 4.5: 42.5 (#43), Qwen1.5 4b Chat: 17.7 (#277)
| Benchmark | Claude Opus 4.5 | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Hard Prompts | 1476 | 976 |
| ARC-AGI-2 | 37.6% | — |
| SimpleBench | 62% | — |
| Kagi LLM Benchmark | 80.2% | — |
| NYT Connections (extended) | 52.5% | — |
| ARC-AGI-1 | 80% | — |
| Chess Puzzles | 12% | — |
| EnigmaEval | 11.9% | — |
| EBR-Bench | 14.3% | — |
| Mystery Game Puzzles | 22% | — |
| DTBench | 89.9% | — |
| LMCA | 44.5% | — |
| Epoch Capabilities Index | 150.1 | — |
| ForecastBench | 60.7 | — |
Math Claude Opus 4.5 leads
Claude Opus 4.5: 38.5 (#85), Qwen1.5 4b Chat: 27.9 (#233)
| Benchmark | Claude Opus 4.5 | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Math | 1463 | 1026 |
| FrontierMath (Tiers 1-3) | 34.4% | — |
| FrontierMath Tier 4 | 4.9% | — |
| OTIS Mock AIME 2024-2025 | 86.1% | — |
| ProofBench | 36% | — |
| FrontierMath (Feb 2025 set) | 20.7% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |
Knowledge Claude Opus 4.5 leads
Claude Opus 4.5: 56.4 (#38), Qwen1.5 4b Chat: 26.2 (#252)
| Benchmark | Claude Opus 4.5 | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Expert | 1488 | 980 |
| GPQA Diamond | 86% | — |
| Humanity's Last Exam | 25.2% | — |
| SimpleQA Verified | 45.7% | — |
| Vectara Hallucination Rate | 10.9% | — |
Multimodal Not comparable
Claude Opus 4.5: 31.1 (#99), Qwen1.5 4b Chat: —
| Benchmark | Claude Opus 4.5 | Qwen1.5 4b Chat |
|---|---|---|
| GeoBench | 75% | — |
| VPCT | 40% | — |
| Furniture Assembly | 28.3% | — |
| LMArena Document | 1462 | — |
Multilingual Claude Opus 4.5 leads
Claude Opus 4.5: 54.5 (#45), Qwen1.5 4b Chat: 24.2 (#285)
| Benchmark | Claude Opus 4.5 | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Non-English | 1438 | 979 |
| LMArena Chinese | 1470 | 1024 |
| LMArena German | 1449 | 902 |
| LMArena Russian | 1448 | 952 |
| LMArena French | 1471 | — |
| LMArena Japanese | 1415 | — |
| LMArena Korean | 1424 | — |
| LMArena Spanish | 1455 | — |
Instruction Following Claude Opus 4.5 leads
Claude Opus 4.5: 77.7 (#20), Qwen1.5 4b Chat: 49.3 (#295)
| Benchmark | Claude Opus 4.5 | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Instruction Following | 1478 | 979 |
Long Context Claude Opus 4.5 leads
Claude Opus 4.5: 46.4 (#21), Qwen1.5 4b Chat: 30.1 (#285)
| Benchmark | Claude Opus 4.5 | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Longer Query | 1480 | 988 |
| CL-bench | 21.1% | — |
Writing & Preference Claude Opus 4.5 leads
Claude Opus 4.5: 68.2 (#28), Qwen1.5 4b Chat: 23.9 (#304)
| Benchmark | Claude Opus 4.5 | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Text | 1451 | 997 |
| LMArena Creative Writing | 1445 | 969 |
| LMArena Multi-Turn | 1466 | 977 |
| EQ-Bench Creative Writing | 1687 | — |
Frequently asked questions
Is Claude Opus 4.5 better than Qwen1.5 4b Chat?
Claude Opus 4.5 is the stronger model overall, scoring 50.5 to 28.3 on the Noometry Index.
Is Claude Opus 4.5 or Qwen1.5 4b Chat better for coding?
Claude Opus 4.5 scores higher on coding benchmarks: 55.4 versus 28.6 in the Noometry coding category.
How many benchmarks do Claude Opus 4.5 and Qwen1.5 4b Chat share?
13 benchmarks have published results for both models. Claude Opus 4.5 has 69 scored results on Noometry and Qwen1.5 4b Chat has 13.