Model comparison
gpt-oss-20b vs Qwen2.5 32B Instruct
gpt-oss-20b is the stronger model overall, scoring 32.1 to 29.7 on the Noometry Index.
Last verified . 4 shared benchmarks.
Alibaba (Qwen)Summary
- They share 4 benchmarks with published results for both. gpt-oss-20b scores higher in 3 categories and Qwen2.5 32B Instruct in 1 category; 2 gaps are clear of the uncertainty.
- The widest gap is in math, where gpt-oss-20b leads 37.6 to 15.3.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 65.3% for gpt-oss-20b and 7.4% for Qwen2.5 32B Instruct.
- gpt-oss-20b is cheaper at $0.018 / $0.09 per million input/output tokens, against $0.70 / $2.80 for Qwen2.5 32B Instruct.
Side by side
| gpt-oss-20b | Qwen2.5 32B Instruct | |
|---|---|---|
| Provider | OpenAI | Alibaba (Qwen) |
| Noometry Index | 32.1 | 29.7 |
| Released | 2025-08-05 | 2024-09 |
| Weights | Open | Open |
| Context window | 131K | 131K |
| Max output | 16K | 8K |
| Input $ / M tokens | $0.018 | $0.70 |
| Output $ / M tokens | $0.09 | $2.80 |
| Results tracked | 34 | 7 |
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Category by category
Coding Too close to call
gpt-oss-20b: 37.1 (#185), Qwen2.5 32B Instruct: 38.1 (#165)
| Benchmark | gpt-oss-20b | Qwen2.5 32B Instruct |
|---|---|---|
| SciCode | 34.4% | — |
| WeirdML | 40.9% | — |
| BigCodeBench Instruct | — | 45% |
| LMArena Coding | 1307 | — |
| BigCodeBench Complete | — | 52.3% |
| ALE-Bench | 566.05 | — |
Agentic & Tool Use Not comparable
gpt-oss-20b: 9.2 (#146), Qwen2.5 32B Instruct: —
| Benchmark | gpt-oss-20b | Qwen2.5 32B Instruct |
|---|---|---|
| Terminal-Bench | 3.4% | — |
Reasoning Too close to call
gpt-oss-20b: 18.8 (#251), Qwen2.5 32B Instruct: 18.5 (#262)
| Benchmark | gpt-oss-20b | Qwen2.5 32B Instruct |
|---|---|---|
| Chess Puzzles | 4% | 0% |
| Epoch Capabilities Index | 137.81 | 128.52 |
| Kagi LLM Benchmark | 53.2% | — |
| CritPt | 1.4% | — |
| LMArena Hard Prompts | 1274 | — |
| DTBench | 68% | — |
| LMCA | 14.5% | — |
Math gpt-oss-20b leads
gpt-oss-20b: 37.6 (#93), Qwen2.5 32B Instruct: 15.3 (#289)
| Benchmark | gpt-oss-20b | Qwen2.5 32B Instruct |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 65.3% | 7.4% |
| Omni-MATH | 56.5% | — |
| LMArena Math | 1317 | — |
| MATH Level 5 | — | 56.1% |
Knowledge gpt-oss-20b leads
gpt-oss-20b: 34.6 (#186), Qwen2.5 32B Instruct: 24.9 (#259)
| Benchmark | gpt-oss-20b | Qwen2.5 32B Instruct |
|---|---|---|
| GPQA Diamond | 60.8% | 46.1% |
| MMLU-Pro | 74% | — |
| GPQA (HELM) | 59.4% | — |
| LMArena Expert | 1258 | — |
Multilingual Not comparable
gpt-oss-20b: 42.4 (#192), Qwen2.5 32B Instruct: —
| Benchmark | gpt-oss-20b | Qwen2.5 32B Instruct |
|---|---|---|
| LMArena Non-English | 1269 | — |
| LMArena Chinese | 1311 | — |
| LMArena German | 1249 | — |
| LMArena Japanese | 1245 | — |
| LMArena Korean | 1239 | — |
| LMArena Russian | 1279 | — |
| LMArena Spanish | 1267 | — |
Instruction Following Not comparable
gpt-oss-20b: 62.0 (#235), Qwen2.5 32B Instruct: —
| Benchmark | gpt-oss-20b | Qwen2.5 32B Instruct |
|---|---|---|
| IFEval | 73.2% | — |
| LMArena Instruction Following | 1236 | — |
Long Context Not comparable
gpt-oss-20b: 37.9 (#203), Qwen2.5 32B Instruct: —
| Benchmark | gpt-oss-20b | Qwen2.5 32B Instruct |
|---|---|---|
| LMArena Longer Query | 1251 | — |
Writing & Preference Not comparable
gpt-oss-20b: 35.8 (#260), Qwen2.5 32B Instruct: —
| Benchmark | gpt-oss-20b | Qwen2.5 32B Instruct |
|---|---|---|
| LMArena Text | 1288 | — |
| LMArena Creative Writing | 1201 | — |
| EQ-Bench Creative Writing | 666 | — |
| WildBench | 73.7% | — |
| LMArena Multi-Turn | 1268 | — |
Frequently asked questions
Is gpt-oss-20b better than Qwen2.5 32B Instruct?
gpt-oss-20b is the stronger model overall, scoring 32.1 to 29.7 on the Noometry Index.
Which is cheaper, gpt-oss-20b or Qwen2.5 32B Instruct?
gpt-oss-20b is cheaper. It lists at $0.018 per million input tokens and $0.09 per million output tokens; Qwen2.5 32B Instruct lists at $0.70 and $2.80.
Is gpt-oss-20b or Qwen2.5 32B Instruct better for coding?
They score almost the same on coding (37.1 vs 38.1); test both on your own repository before choosing.
Which has the bigger context window?
Both accept 131K tokens.
How many benchmarks do gpt-oss-20b and Qwen2.5 32B Instruct share?
4 benchmarks have published results for both models. gpt-oss-20b has 34 scored results on Noometry and Qwen2.5 32B Instruct has 7.