Model comparison
Claude 2.1 vs Qwen3.5 Plus
Qwen3.5 Plus is the stronger model overall, scoring 42.9 to 25.2 on the Noometry Index.
Last verified . 4 shared benchmarks.
Alibaba (Qwen)Summary
- They share 4 benchmarks with published results for both. Claude 2.1 scores higher in 0 categories and Qwen3.5 Plus in 3 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where Qwen3.5 Plus leads 49.6 to 10.2.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 1.9% for Claude 2.1 and 86.7% for Qwen3.5 Plus.
Side by side
| Claude 2.1 | Qwen3.5 Plus | |
|---|---|---|
| Provider | Anthropic | Alibaba (Qwen) |
| Noometry Index | 25.2 | 42.9 |
| Released | 2023-11-21 | 2026-02-16 |
| Weights | Proprietary | Proprietary |
| Context window | — | 1M |
| Max output | — | 66K |
| Input $ / M tokens | — | $0.40 |
| Output $ / M tokens | — | $2.40 |
| Results tracked | 7 | 15 |
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Category by category
Coding Not comparable
Claude 2.1: 26.2 (#327), Qwen3.5 Plus: —
Agentic & Tool Use Not comparable
Claude 2.1: —, Qwen3.5 Plus: —
| Benchmark | Claude 2.1 | Qwen3.5 Plus |
|---|---|---|
| Vending-Bench 2 | — | 0.54 |
Reasoning Qwen3.5 Plus leads
Claude 2.1: 21.4 (#221), Qwen3.5 Plus: 32.8 (#74)
| Benchmark | Claude 2.1 | Qwen3.5 Plus |
|---|---|---|
| DTBench | 51% | 80.5% |
| Epoch Capabilities Index | 119.27 | 146.78 |
| Chess Puzzles | — | 22% |
| Mystery Game Puzzles | — | 17% |
| LMCA | — | 36.4% |
| ForecastBench | 54.2 | — |
Math Qwen3.5 Plus leads
Claude 2.1: 10.2 (#315), Qwen3.5 Plus: 49.6 (#61)
| Benchmark | Claude 2.1 | Qwen3.5 Plus |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 1.9% | 86.7% |
| FrontierMath (Feb 2025 set) | — | 21% |
| FrontierMath Tier 4 (v1) | — | 2.1% |
Knowledge Qwen3.5 Plus leads
Claude 2.1: 15.4 (#292), Qwen3.5 Plus: 46.0 (#83)
| Benchmark | Claude 2.1 | Qwen3.5 Plus |
|---|---|---|
| GPQA Diamond | 33% | 84.8% |
| SimpleQA Verified | — | 25.4% |
| Vectara Hallucination Rate | — | 10.7% |
| MMLU | 73.5% | — |
Long Context Not comparable
Claude 2.1: —, Qwen3.5 Plus: 43.0 (#113)
| Benchmark | Claude 2.1 | Qwen3.5 Plus |
|---|---|---|
| CL-bench | — | 19.8% |
| CL-bench Life | — | 12.4% |
Frequently asked questions
Is Claude 2.1 better than Qwen3.5 Plus?
Qwen3.5 Plus is the stronger model overall, scoring 42.9 to 25.2 on the Noometry Index.
How many benchmarks do Claude 2.1 and Qwen3.5 Plus share?
4 benchmarks have published results for both models. Claude 2.1 has 7 scored results on Noometry and Qwen3.5 Plus has 15.