Which is better, Claude Sonnet 4.5 or Qwen3.5 2B?

Claude Sonnet 4.5 vs Qwen3.5 2B

30 SHARED BENCHMARKS

Across 30 shared benchmarks, Claude Sonnet 4.5 scores higher on 28 and Qwen3.5 2B on 2. The widest gap is TauBench V3 - Banking, where Claude Sonnet 4.5 scores 24.5 against 2.5.

ANTHROPICVSALIBABA30 SHARED28–2 HEAD-TO-HEAD

BenchmarkClaude Sonnet 4.5MARGINQwen3.5 2B

AA Agentic Index50.60.8

AA Intelligence366.9

AA-LCR72.325.6

AA-Omniscience-0.1-60.2

AIME 20258819

Artificial Analysis Coding Index52.12.9

critpt1.10

gdpval40.40

GPQA Diamond83.451.6

HallusionBench59.965.5

HLE19.85

IFBench57.341.3

longbench_v261.838.7

MathVista79.848.7

mmlu_redux95.679.6

MMLU-Pro88.266.5

mmmlu89.163.1

MMMU (val) (Pass@1)77.844.1

MMMU-Pro68.743

multichallenge55.333.7

OmniScience Accuracy32.98.1

OmniScience Non-Hallucination50.925.8

RealWorldQA70.365.1

scicode45.77.2

SimpleVQA57.635.2

TauBench V3 - Banking24.52.5

Terminal-Bench 2.155.83

Terminal-Bench Hard35.63.8

τ²-Bench Telecom (AA run)78.181.6

τ³-Bench196.2

Best tracked score per model per benchmark (default configuration; source-attributed). ↓ marks lower-is-better metrics. Open either model for its full surface, provenance and pricing.

Compare Claude Sonnet 4.5 withALL PAIRINGS →

AnthropicClaude Opus 4.8 Claude Opus 4.6 Claude 3.5 Sonnet Claude Fable 5 Claude Opus 4.5 Claude Opus 5

Across the fieldQwen3.6 27B Qwen3.7 Max Qwen3.8 Max Preview Qwen3.7 Plus Preview Claude Opus 4 Qwen3.5 4B Gemini 3.6 Flash Nemotron 3 Super 120B A12B

Compare Qwen3.5 2B withALL PAIRINGS →

AlibabaQwen3.5 35B A3B Qwen3 VL 4B (Reasoning)Qwen3.5 397B A17B Qwen2.5 Instruct 72B Qwen3.5 27B Qwen3.6 Plus

Across the fieldClaude 3.5 Sonnet Gemini 3 Pro Claude Fable 5 GPT-5 Claude Opus 4.5 DeepSeek-V4-Pro DeepSeek-V3 Kimi K2.6