# Deepseek Coder v2 vs gpt-oss-20b

> Deepseek Coder v2 is the stronger model overall, scoring 35.9 to 32.5 on the Noometry Index.

- Canonical page: https://noometry.com/compare/deepseek-coder-v2-vs-gpt-oss-20b
- Last updated: 2026-10-11
- Shared benchmarks: 16

## Summary

- They share 16 benchmarks with published results for both. Deepseek Coder v2 scores higher in 3 categories and gpt-oss-20b in 5 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in multilingual, where gpt-oss-20b leads 42.2 to 36.3.

## Snapshot

| | Deepseek Coder v2 | gpt-oss-20b |
|---|---|---|
| Provider | DeepSeek | OpenAI |
| Noometry Index | 35.9 | 32.5 |
| Rank | 220 | 255 |
| Context | — | 131K |
| Input $/M | — | $0.018 |
| Output $/M | — | $0.09 |
| Weights | Open | Open |

## Coding

- Deepseek Coder v2: 38.1 (#183)
- gpt-oss-20b: 37.6 (#192)

| Benchmark | Deepseek Coder v2 | gpt-oss-20b |
|---|---|---|
| LMArena Coding | 1251 | 1306 |
| SciCode | — | 34.4% |
| WeirdML | — | 40.9% |
| BigCodeBench Instruct | 48.2% | — |
| BigCodeBench Complete | 59.7% | — |
| ALE-Bench | — | 566.05 |
| HumanEval+ | 82.3% | — |
| MBPP+ | 75.1% | — |

## Agentic & Tool Use

- Deepseek Coder v2: —
- gpt-oss-20b: 9.3 (#154)

| Benchmark | Deepseek Coder v2 | gpt-oss-20b |
|---|---|---|
| Terminal-Bench | — | 3.4% |

## Reasoning

- Deepseek Coder v2: 23.6 (#176)
- gpt-oss-20b: 19.3 (#261)

| Benchmark | Deepseek Coder v2 | gpt-oss-20b |
|---|---|---|
| LMArena Hard Prompts | 1207 | 1274 |
| Kagi LLM Benchmark | — | 53.2% |
| CritPt | — | 1.4% |
| Chess Puzzles | — | 4% |
| DTBench | — | 68% |
| LMCA | — | 14.5% |
| Epoch Capabilities Index | — | 137.82 |
| WinoGrande | 83.7% | — |

## Math

- Deepseek Coder v2: 34.9 (#190)
- gpt-oss-20b: 39.4 (#103)

| Benchmark | Deepseek Coder v2 | gpt-oss-20b |
|---|---|---|
| LMArena Math | 1241 | 1317 |
| OTIS Mock AIME 2024-2025 | — | 65.3% |
| Omni-MATH | — | 56.5% |
| GSM8K | 94.5% | — |

## Knowledge

- Deepseek Coder v2: 32.3 (#212)
- gpt-oss-20b: 34.6 (#195)

| Benchmark | Deepseek Coder v2 | gpt-oss-20b |
|---|---|---|
| LMArena Expert | 1181 | 1258 |
| GPQA Diamond | — | 60.8% |
| MMLU-Pro | — | 74% |
| GPQA (HELM) | — | 59.4% |
| ARC (AI2) Challenge | 64.3% | — |

## Multilingual

- Deepseek Coder v2: 36.3 (#240)
- gpt-oss-20b: 42.2 (#197)

| Benchmark | Deepseek Coder v2 | gpt-oss-20b |
|---|---|---|
| LMArena Non-English | 1182 | 1268 |
| LMArena Chinese | 1201 | 1314 |
| LMArena German | 1164 | 1255 |
| LMArena Japanese | 1126 | 1244 |
| LMArena Korean | 1104 | 1236 |
| LMArena Russian | 1188 | 1278 |
| LMArena Spanish | 1153 | 1267 |
| LMArena French | 1185 | — |

## Instruction Following

- Deepseek Coder v2: 61.7 (#242)
- gpt-oss-20b: 61.8 (#240)

| Benchmark | Deepseek Coder v2 | gpt-oss-20b |
|---|---|---|
| LMArena Instruction Following | 1180 | 1236 |
| IFEval | — | 73.2% |

## Long Context

- Deepseek Coder v2: 37.0 (#224)
- gpt-oss-20b: 37.9 (#209)

| Benchmark | Deepseek Coder v2 | gpt-oss-20b |
|---|---|---|
| LMArena Longer Query | 1219 | 1250 |

## Writing & Preference

- Deepseek Coder v2: 38.2 (#253)
- gpt-oss-20b: 35.5 (#265)

| Benchmark | Deepseek Coder v2 | gpt-oss-20b |
|---|---|---|
| LMArena Text | 1191 | 1287 |
| LMArena Creative Writing | 1120 | 1201 |
| LMArena Multi-Turn | 1177 | 1268 |
| EQ-Bench Creative Writing | — | 666 |
| WildBench | — | 73.7% |

## FAQ

### Is Deepseek Coder v2 better than gpt-oss-20b?

Deepseek Coder v2 is the stronger model overall, scoring 35.9 to 32.5 on the Noometry Index.

### Is Deepseek Coder v2 or gpt-oss-20b better for coding?

They score almost the same on coding (38.1 vs 37.6); test both on your own repository before choosing.

### How many benchmarks do Deepseek Coder v2 and gpt-oss-20b share?

16 benchmarks have published results for both models. Deepseek Coder v2 has 24 scored results on Noometry and gpt-oss-20b has 34.