# Claude 2.1 vs Qwen1.5 4b Chat

> Qwen1.5 4b Chat is the stronger model overall, scoring 28.8 to 25.2 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-2-1-vs-qwen1-5-4b-chat
- Last updated: 2026-10-12
- Shared benchmarks: 0

## Summary

- The widest gap is in math, where Qwen1.5 4b Chat leads 30.4 to 10.2.
- Qwen1.5 4b Chat has downloadable open weights; the other is API-only.

## Snapshot

| | Claude 2.1 | Qwen1.5 4b Chat |
|---|---|---|
| Provider | Anthropic | Alibaba (Qwen) |
| Noometry Index | 25.2 | 28.8 |
| Rank | 345 | 322 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Open |

## Coding

- Claude 2.1: 26.2 (#327)
- Qwen1.5 4b Chat: 29.1 (#308)

| Benchmark | Claude 2.1 | Qwen1.5 4b Chat |
|---|---|---|
| WeirdML | 7.1% | — |
| LMArena Coding | — | 999 |

## Reasoning

- Claude 2.1: 21.4 (#221)
- Qwen1.5 4b Chat: 18.5 (#279)

| Benchmark | Claude 2.1 | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Hard Prompts | — | 976 |
| DTBench | 51% | — |
| Epoch Capabilities Index | 119.27 | — |
| ForecastBench | 54.2 | — |

## Math

- Claude 2.1: 10.2 (#315)
- Qwen1.5 4b Chat: 30.4 (#234)

| Benchmark | Claude 2.1 | Qwen1.5 4b Chat |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 1.9% | — |
| LMArena Math | — | 1026 |

## Knowledge

- Claude 2.1: 15.4 (#292)
- Qwen1.5 4b Chat: 26.7 (#255)

| Benchmark | Claude 2.1 | Qwen1.5 4b Chat |
|---|---|---|
| GPQA Diamond | 33% | — |
| LMArena Expert | — | 980 |
| MMLU | 73.5% | — |

## Multilingual

- Claude 2.1: —
- Qwen1.5 4b Chat: 24.1 (#290)

| Benchmark | Claude 2.1 | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Non-English | — | 979 |
| LMArena Chinese | — | 1024 |
| LMArena German | — | 902 |
| LMArena Russian | — | 952 |

## Instruction Following

- Claude 2.1: —
- Qwen1.5 4b Chat: 49.0 (#300)

| Benchmark | Claude 2.1 | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Instruction Following | — | 978 |

## Long Context

- Claude 2.1: —
- Qwen1.5 4b Chat: 30.1 (#290)

| Benchmark | Claude 2.1 | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Longer Query | — | 988 |

## Writing & Preference

- Claude 2.1: —
- Qwen1.5 4b Chat: 23.8 (#309)

| Benchmark | Claude 2.1 | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Text | — | 997 |
| LMArena Creative Writing | — | 969 |
| LMArena Multi-Turn | — | 977 |

## FAQ

### Is Claude 2.1 better than Qwen1.5 4b Chat?

Qwen1.5 4b Chat is the stronger model overall, scoring 28.8 to 25.2 on the Noometry Index.

### Is Claude 2.1 or Qwen1.5 4b Chat better for coding?

Qwen1.5 4b Chat scores higher on coding benchmarks: 29.1 versus 26.2 in the Noometry coding category.

### How many benchmarks do Claude 2.1 and Qwen1.5 4b Chat share?

0 benchmarks have published results for both models. Claude 2.1 has 7 scored results on Noometry and Qwen1.5 4b Chat has 13.