Model comparison
gpt-oss-20b vs Granite 3.1 8b Instruct
gpt-oss-20b and Granite 3.1 8b Instruct score almost the same on the Noometry Index (32.5 vs 32.4), so choose on price, context window or the category you care about most.
Last verified . 12 shared benchmarks.
Summary
- They share 12 benchmarks with published results for both. gpt-oss-20b scores higher in 6 categories and Granite 3.1 8b Instruct in 3 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in agentic & tool use, where Granite 3.1 8b Instruct leads 24.1 to 9.3.
Side by side
| gpt-oss-20b | Granite 3.1 8b Instruct | |
|---|---|---|
| Provider | OpenAI | IBM |
| Noometry Index | 32.5 | 32.4 |
| 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 | 13 |
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Category by category
Coding gpt-oss-20b leads
gpt-oss-20b: 37.6 (#192), Granite 3.1 8b Instruct: 34.5 (#233)
| Benchmark | gpt-oss-20b | Granite 3.1 8b Instruct |
|---|---|---|
| LMArena Coding | 1306 | 1186 |
| SciCode | 34.4% | — |
| WeirdML | 40.9% | — |
| ALE-Bench | 566.05 | — |
Agentic & Tool Use Granite 3.1 8b Instruct leads
gpt-oss-20b: 9.3 (#154), Granite 3.1 8b Instruct: 24.1 (#120)
| Benchmark | gpt-oss-20b | Granite 3.1 8b Instruct |
|---|---|---|
| Terminal-Bench | 3.4% | — |
| Berkeley Function Calling Leaderboard | — | 27.1% |
Reasoning Granite 3.1 8b Instruct leads
gpt-oss-20b: 19.3 (#261), Granite 3.1 8b Instruct: 22.1 (#207)
| Benchmark | gpt-oss-20b | Granite 3.1 8b Instruct |
|---|---|---|
| LMArena Hard Prompts | 1274 | 1145 |
| 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), Granite 3.1 8b Instruct: 33.0 (#209)
| Benchmark | gpt-oss-20b | Granite 3.1 8b Instruct |
|---|---|---|
| LMArena Math | 1317 | 1152 |
| OTIS Mock AIME 2024-2025 | 65.3% | — |
| Omni-MATH | 56.5% | — |
Knowledge gpt-oss-20b leads
gpt-oss-20b: 34.6 (#195), Granite 3.1 8b Instruct: 31.1 (#220)
| Benchmark | gpt-oss-20b | Granite 3.1 8b Instruct |
|---|---|---|
| LMArena Expert | 1258 | 1142 |
| GPQA Diamond | 60.8% | — |
| MMLU-Pro | 74% | — |
| GPQA (HELM) | 59.4% | — |
Multilingual gpt-oss-20b leads
gpt-oss-20b: 42.2 (#197), Granite 3.1 8b Instruct: 30.9 (#260)
| Benchmark | gpt-oss-20b | Granite 3.1 8b Instruct |
|---|---|---|
| LMArena Non-English | 1268 | 1099 |
| LMArena Chinese | 1314 | 1145 |
| LMArena Russian | 1278 | 1092 |
| LMArena German | 1255 | — |
| LMArena Japanese | 1244 | — |
| LMArena Korean | 1236 | — |
| LMArena Spanish | 1267 | — |
Instruction Following gpt-oss-20b leads
gpt-oss-20b: 61.8 (#240), Granite 3.1 8b Instruct: 58.6 (#259)
| Benchmark | gpt-oss-20b | Granite 3.1 8b Instruct |
|---|---|---|
| LMArena Instruction Following | 1236 | 1131 |
| IFEval | 73.2% | — |
Long Context gpt-oss-20b leads
gpt-oss-20b: 37.9 (#209), Granite 3.1 8b Instruct: 35.2 (#241)
| Benchmark | gpt-oss-20b | Granite 3.1 8b Instruct |
|---|---|---|
| LMArena Longer Query | 1250 | 1162 |
Writing & Preference Too close to call
gpt-oss-20b: 35.5 (#265), Granite 3.1 8b Instruct: 35.5 (#266)
| Benchmark | gpt-oss-20b | Granite 3.1 8b Instruct |
|---|---|---|
| LMArena Text | 1287 | 1150 |
| LMArena Creative Writing | 1201 | 1129 |
| LMArena Multi-Turn | 1268 | 1108 |
| EQ-Bench Creative Writing | 666 | — |
| WildBench | 73.7% | — |
Frequently asked questions
Is gpt-oss-20b better than Granite 3.1 8b Instruct?
gpt-oss-20b and Granite 3.1 8b Instruct score almost the same on the Noometry Index (32.5 vs 32.4), so choose on price, context window or the category you care about most.
Is gpt-oss-20b or Granite 3.1 8b Instruct better for coding?
gpt-oss-20b scores higher on coding benchmarks: 37.6 versus 34.5 in the Noometry coding category.
How many benchmarks do gpt-oss-20b and Granite 3.1 8b Instruct share?
12 benchmarks have published results for both models. gpt-oss-20b has 34 scored results on Noometry and Granite 3.1 8b Instruct has 13.