Model comparison
gpt-oss-120b vs Grok Build 0.1
gpt-oss-120b and Grok Build 0.1 score almost the same on the Noometry Index (36.3 vs 36.4), so choose on price, context window or the category you care about most.
Last verified . 2 shared benchmarks.
Summary
- They share 2 benchmarks with published results for both. gpt-oss-120b scores higher in 0 categories and Grok Build 0.1 in 3 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok Build 0.1 leads 32.2 to 20.0.
- The biggest single-benchmark swing is SciCode: 36% for gpt-oss-120b and 50.2% for Grok Build 0.1.
- gpt-oss-120b is cheaper at $0.037 / $0.17 per million input/output tokens, against $1 / $2 for Grok Build 0.1.
- Grok Build 0.1 accepts more context: 256K tokens versus 131K.
- gpt-oss-120b has downloadable open weights; the other is API-only.
Side by side
| gpt-oss-120b | Grok Build 0.1 | |
|---|---|---|
| Provider | OpenAI | xAI |
| Noometry Index | 36.3 | 36.4 |
| Released | 2025-08-05 | 2026-04-16 |
| Weights | Open | Proprietary |
| Context window | 131K | 256K |
| Max output | 41K | 256K |
| Input $ / M tokens | $0.037 | $1 |
| Output $ / M tokens | $0.17 | $2 |
| Results tracked | 48 | 3 |
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Category by category
Coding Grok Build 0.1 leads
gpt-oss-120b: 33.5 (#256), Grok Build 0.1: 43.1 (#91)
| Benchmark | gpt-oss-120b | Grok Build 0.1 |
|---|---|---|
| SciCode | 36% | 50.2% |
| SWE-bench Verified (bash only) | 26% | — |
| Aider Polyglot | 41.8% | — |
| WeirdML | 48.2% | — |
| LMArena Coding | 1380 | — |
| ALE-Bench | 575.62 | — |
| AlgoTune | 1.41 | — |
Agentic & Tool Use Grok Build 0.1 leads
gpt-oss-120b: 12.2 (#153), Grok Build 0.1: 22.7 (#129)
| Benchmark | gpt-oss-120b | Grok Build 0.1 |
|---|---|---|
| Terminal-Bench | 18.7% | — |
| APEX-Agents | 4.4% | — |
| GBAEval | — | 2.4% |
| METR Time Horizons | 56.6% | — |
| Vending-Bench 2 | -21.53 | — |
Reasoning Grok Build 0.1 leads
gpt-oss-120b: 20.0 (#245), Grok Build 0.1: 32.2 (#77)
| Benchmark | gpt-oss-120b | Grok Build 0.1 |
|---|---|---|
| CritPt | 1.1% | 9.1% |
| SimpleBench | 22.1% | — |
| Kagi LLM Benchmark | 58.6% | — |
| Chess Puzzles | 20% | — |
| LMArena Hard Prompts | 1364 | — |
| Mystery Game Puzzles | 2% | — |
| DTBench | 76.3% | — |
| LMCA | 22.1% | — |
| Surface Evolver Bench | 25% | — |
| Epoch Capabilities Index | 139.93 | — |
Math Not comparable
gpt-oss-120b: 52.5 (#50), Grok Build 0.1: —
| Benchmark | gpt-oss-120b | Grok Build 0.1 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 88.9% | — |
| Omni-MATH | 68.8% | — |
| LMArena Math | 1389 | — |
Knowledge Not comparable
gpt-oss-120b: 42.4 (#96), Grok Build 0.1: —
| Benchmark | gpt-oss-120b | Grok Build 0.1 |
|---|---|---|
| GPQA Diamond | 75.8% | — |
| MMLU-Pro | 79.5% | — |
| Confabulations | 15.7% | — |
| Vectara Hallucination Rate | 14.2% | — |
| GPQA (HELM) | 68.4% | — |
| LMArena Expert | 1356 | — |
Multilingual Not comparable
gpt-oss-120b: 48.0 (#147), Grok Build 0.1: —
| Benchmark | gpt-oss-120b | Grok Build 0.1 |
|---|---|---|
| LMArena Non-English | 1351 | — |
| LMArena Chinese | 1385 | — |
| LMArena French | 1369 | — |
| LMArena German | 1353 | — |
| LMArena Japanese | 1331 | — |
| LMArena Korean | 1282 | — |
| LMArena Russian | 1343 | — |
| LMArena Spanish | 1389 | — |
Instruction Following Not comparable
gpt-oss-120b: 69.3 (#173), Grok Build 0.1: —
| Benchmark | gpt-oss-120b | Grok Build 0.1 |
|---|---|---|
| IFEval | 83.6% | — |
| LMArena Instruction Following | 1318 | — |
Long Context Not comparable
gpt-oss-120b: 31.4 (#278), Grok Build 0.1: —
| Benchmark | gpt-oss-120b | Grok Build 0.1 |
|---|---|---|
| Fiction.LiveBench | 44.4% | — |
| LMArena Longer Query | 1319 | — |
Writing & Preference Not comparable
gpt-oss-120b: 46.5 (#217), Grok Build 0.1: —
| Benchmark | gpt-oss-120b | Grok Build 0.1 |
|---|---|---|
| LMArena Text | 1365 | — |
| LMArena Creative Writing | 1275 | — |
| Short-Story Creative Writing | 77.1% | — |
| EQ-Bench Creative Writing | 961 | — |
| WildBench | 84.5% | — |
| LMArena Multi-Turn | 1340 | — |
Frequently asked questions
Is gpt-oss-120b better than Grok Build 0.1?
gpt-oss-120b and Grok Build 0.1 score almost the same on the Noometry Index (36.3 vs 36.4), so choose on price, context window or the category you care about most.
Which is cheaper, gpt-oss-120b or Grok Build 0.1?
gpt-oss-120b is cheaper. It lists at $0.037 per million input tokens and $0.17 per million output tokens; Grok Build 0.1 lists at $1 and $2.
Is gpt-oss-120b or Grok Build 0.1 better for coding?
Grok Build 0.1 scores higher on coding benchmarks: 43.1 versus 33.5 in the Noometry coding category.
Which has the bigger context window?
Grok Build 0.1 does, with 256K tokens against 131K.
How many benchmarks do gpt-oss-120b and Grok Build 0.1 share?
2 benchmarks have published results for both models. gpt-oss-120b has 48 scored results on Noometry and Grok Build 0.1 has 3.