# gpt-oss-20b vs Qwen2.5 Plus 1127

> Qwen2.5 Plus 1127 is the stronger model overall, scoring 38.1 to 32.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-oss-20b-vs-qwen2-5-plus
- Last updated: 2026-10-10
- Shared benchmarks: 14

## Summary

- They share 14 benchmarks with published results for both. gpt-oss-20b scores higher in 2 categories and Qwen2.5 Plus 1127 in 6 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Qwen2.5 Plus 1127 leads 49.5 to 35.8.
- gpt-oss-20b has downloadable open weights; the other is API-only.

## Snapshot

| | gpt-oss-20b | Qwen2.5 Plus 1127 |
|---|---|---|
| Provider | OpenAI | Alibaba (Qwen) |
| Noometry Index | 32.1 | 38.1 |
| Rank | 249 | 179 |
| Context | 131K | — |
| Input $/M | $0.018 | — |
| Output $/M | $0.09 | — |
| Weights | Open | Proprietary |

## Coding

- gpt-oss-20b: 37.1 (#185)
- Qwen2.5 Plus 1127: 37.9 (#171)

| Benchmark | gpt-oss-20b | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Coding | 1307 | 1314 |
| SciCode | 34.4% | — |
| WeirdML | 40.9% | — |
| ALE-Bench | 566.05 | — |

## Agentic & Tool Use

- gpt-oss-20b: 9.2 (#146)
- Qwen2.5 Plus 1127: —

| Benchmark | gpt-oss-20b | Qwen2.5 Plus 1127 |
|---|---|---|
| Terminal-Bench | 3.4% | — |

## Reasoning

- gpt-oss-20b: 18.8 (#251)
- Qwen2.5 Plus 1127: 24.8 (#139)

| Benchmark | gpt-oss-20b | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Hard Prompts | 1274 | 1299 |
| Kagi LLM Benchmark | 53.2% | — |
| CritPt | 1.4% | — |
| Chess Puzzles | 4% | — |
| DTBench | 68% | — |
| LMCA | 14.5% | — |
| Epoch Capabilities Index | 137.81 | — |

## Math

- gpt-oss-20b: 37.6 (#93)
- Qwen2.5 Plus 1127: 33.5 (#175)

| Benchmark | gpt-oss-20b | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Math | 1317 | 1298 |
| OTIS Mock AIME 2024-2025 | 65.3% | — |
| Omni-MATH | 56.5% | — |

## Knowledge

- gpt-oss-20b: 34.6 (#186)
- Qwen2.5 Plus 1127: 34.9 (#179)

| Benchmark | gpt-oss-20b | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Expert | 1258 | 1289 |
| GPQA Diamond | 60.8% | — |
| MMLU-Pro | 74% | — |
| GPQA (HELM) | 59.4% | — |

## Multilingual

- gpt-oss-20b: 42.4 (#192)
- Qwen2.5 Plus 1127: 42.1 (#196)

| Benchmark | gpt-oss-20b | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Non-English | 1269 | 1265 |
| LMArena Chinese | 1311 | 1314 |
| LMArena German | 1249 | 1231 |
| LMArena Japanese | 1245 | 1207 |
| LMArena Russian | 1279 | 1271 |
| LMArena Korean | 1239 | — |
| LMArena Spanish | 1267 | — |

## Instruction Following

- gpt-oss-20b: 62.0 (#235)
- Qwen2.5 Plus 1127: 67.4 (#194)

| Benchmark | gpt-oss-20b | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Instruction Following | 1236 | 1275 |
| IFEval | 73.2% | — |

## Long Context

- gpt-oss-20b: 37.9 (#203)
- Qwen2.5 Plus 1127: 39.2 (#180)

| Benchmark | gpt-oss-20b | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Longer Query | 1251 | 1292 |

## Writing & Preference

- gpt-oss-20b: 35.8 (#260)
- Qwen2.5 Plus 1127: 49.5 (#186)

| Benchmark | gpt-oss-20b | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Text | 1288 | 1299 |
| LMArena Creative Writing | 1201 | 1262 |
| LMArena Multi-Turn | 1268 | 1299 |
| EQ-Bench Creative Writing | 666 | — |
| WildBench | 73.7% | — |

## FAQ

### Is gpt-oss-20b better than Qwen2.5 Plus 1127?

Qwen2.5 Plus 1127 is the stronger model overall, scoring 38.1 to 32.1 on the Noometry Index.

### Is gpt-oss-20b or Qwen2.5 Plus 1127 better for coding?

They score almost the same on coding (37.1 vs 37.9); test both on your own repository before choosing.

### How many benchmarks do gpt-oss-20b and Qwen2.5 Plus 1127 share?

14 benchmarks have published results for both models. gpt-oss-20b has 34 scored results on Noometry and Qwen2.5 Plus 1127 has 14.