Model comparison
gpt-oss-20b vs Olmo 3.1 32b Instruct
Olmo 3.1 32b Instruct is the stronger model overall, scoring 39.4 to 32.5 on the Noometry Index.
Last verified . 15 shared benchmarks.
Allen Institute for AI (Ai2)Summary
- They share 15 benchmarks with published results for both. gpt-oss-20b scores higher in 1 category and Olmo 3.1 32b Instruct in 7 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Olmo 3.1 32b Instruct leads 50.2 to 35.5.
Side by side
| gpt-oss-20b | Olmo 3.1 32b Instruct | |
|---|---|---|
| Provider | OpenAI | Allen Institute for AI (Ai2) |
| Noometry Index | 32.5 | 39.4 |
| Released | 2025-08-05 | — |
| Weights | Open | Open |
| Context window | 131K | — |
| Max output | 16K | — |
| Input $ / M tokens | $0.018 | — |
| Output $ / M tokens | $0.09 | — |
| Results tracked | 34 | 16 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Olmo 3.1 32b Instruct leads
gpt-oss-20b: 37.6 (#192), Olmo 3.1 32b Instruct: 39.5 (#157)
| Benchmark | gpt-oss-20b | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Coding | 1306 | 1347 |
| SciCode | 34.4% | — |
| WeirdML | 40.9% | — |
| ALE-Bench | 566.05 | — |
Agentic & Tool Use Not comparable
gpt-oss-20b: 9.3 (#154), Olmo 3.1 32b Instruct: —
| Benchmark | gpt-oss-20b | Olmo 3.1 32b Instruct |
|---|---|---|
| Terminal-Bench | 3.4% | — |
Reasoning Olmo 3.1 32b Instruct leads
gpt-oss-20b: 19.3 (#261), Olmo 3.1 32b Instruct: 26.4 (#132)
| Benchmark | gpt-oss-20b | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Hard Prompts | 1274 | 1322 |
| Kagi LLM Benchmark | 53.2% | — |
| CritPt | 1.4% | — |
| Chess Puzzles | 4% | — |
| DTBench | 68% | — |
| LMCA | 14.5% | — |
| Epoch Capabilities Index | 137.82 | — |
Math gpt-oss-20b leads
gpt-oss-20b: 39.4 (#103), Olmo 3.1 32b Instruct: 36.3 (#167)
| Benchmark | gpt-oss-20b | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Math | 1317 | 1305 |
| OTIS Mock AIME 2024-2025 | 65.3% | — |
| Omni-MATH | 56.5% | — |
Knowledge Olmo 3.1 32b Instruct leads
gpt-oss-20b: 34.6 (#195), Olmo 3.1 32b Instruct: 36.1 (#175)
| Benchmark | gpt-oss-20b | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Expert | 1258 | 1308 |
| GPQA Diamond | 60.8% | — |
| MMLU-Pro | 74% | — |
| GPQA (HELM) | 59.4% | — |
Multilingual Too close to call
gpt-oss-20b: 42.2 (#197), Olmo 3.1 32b Instruct: 42.6 (#191)
| Benchmark | gpt-oss-20b | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Non-English | 1268 | 1275 |
| LMArena Chinese | 1314 | 1304 |
| LMArena German | 1255 | 1282 |
| LMArena Korean | 1236 | 1206 |
| LMArena Russian | 1278 | 1268 |
| LMArena Spanish | 1267 | 1336 |
| LMArena French | — | 1328 |
| LMArena Japanese | 1244 | — |
Instruction Following Olmo 3.1 32b Instruct leads
gpt-oss-20b: 61.8 (#240), Olmo 3.1 32b Instruct: 68.6 (#187)
| Benchmark | gpt-oss-20b | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Instruction Following | 1236 | 1299 |
| IFEval | 73.2% | — |
Long Context Olmo 3.1 32b Instruct leads
gpt-oss-20b: 37.9 (#209), Olmo 3.1 32b Instruct: 39.9 (#166)
| Benchmark | gpt-oss-20b | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Longer Query | 1250 | 1312 |
Writing & Preference Olmo 3.1 32b Instruct leads
gpt-oss-20b: 35.5 (#265), Olmo 3.1 32b Instruct: 50.2 (#185)
| Benchmark | gpt-oss-20b | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Text | 1287 | 1311 |
| LMArena Creative Writing | 1201 | 1264 |
| LMArena Multi-Turn | 1268 | 1309 |
| EQ-Bench Creative Writing | 666 | — |
| WildBench | 73.7% | — |
Frequently asked questions
Is gpt-oss-20b better than Olmo 3.1 32b Instruct?
Olmo 3.1 32b Instruct is the stronger model overall, scoring 39.4 to 32.5 on the Noometry Index.
Is gpt-oss-20b or Olmo 3.1 32b Instruct better for coding?
Olmo 3.1 32b Instruct scores higher on coding benchmarks: 39.5 versus 37.6 in the Noometry coding category.
How many benchmarks do gpt-oss-20b and Olmo 3.1 32b Instruct share?
15 benchmarks have published results for both models. gpt-oss-20b has 34 scored results on Noometry and Olmo 3.1 32b Instruct has 16.