# 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.

- Canonical page: https://noometry.com/compare/claude-2-1-vs-qwen3-5-plus
- Last updated: 2026-10-10
- Shared benchmarks: 4

## 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.

## Snapshot

| | Claude 2.1 | Qwen3.5 Plus |
|---|---|---|
| Provider | Anthropic | Alibaba (Qwen) |
| Noometry Index | 25.2 | 42.9 |
| Rank | 345 | 106 |
| Context | — | 1M |
| Input $/M | — | $0.40 |
| Output $/M | — | $2.40 |
| Weights | Proprietary | Proprietary |

## Coding

- Claude 2.1: 26.2 (#327)
- Qwen3.5 Plus: —

| Benchmark | Claude 2.1 | Qwen3.5 Plus |
|---|---|---|
| WeirdML | 7.1% | — |
| ALE-Bench | — | 621.92 |

## Agentic & Tool Use

- Claude 2.1: —
- Qwen3.5 Plus: —

| Benchmark | Claude 2.1 | Qwen3.5 Plus |
|---|---|---|
| Vending-Bench 2 | — | 0.54 |

## Reasoning

- 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

- 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

- 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

- 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% |

## FAQ

### 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.