Model comparison
gpt-oss-120b vs Yi-Lightning
gpt-oss-120b and Yi-Lightning score almost the same on the Noometry Index (36.3 vs 37.1), so choose on price, context window or the category you care about most.
Last verified . 18 shared benchmarks.
Summary
- They share 18 benchmarks with published results for both. gpt-oss-120b scores higher in 5 categories and Yi-Lightning in 3 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where gpt-oss-120b leads 52.5 to 36.2.
- The biggest single-benchmark swing is Aider Polyglot: 41.8% for gpt-oss-120b and 12.9% for Yi-Lightning.
- gpt-oss-120b has downloadable open weights; the other is API-only.
Side by side
| gpt-oss-120b | Yi-Lightning | |
|---|---|---|
| Provider | OpenAI | 01.AI |
| Noometry Index | 36.3 | 37.1 |
| Released | 2025-08-05 | 2024-12-02 |
| Weights | Open | Proprietary |
| Context window | 131K | — |
| Max output | 41K | — |
| Input $ / M tokens | $0.037 | — |
| Output $ / M tokens | $0.17 | — |
| Results tracked | 48 | 18 |
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Category by category
Coding gpt-oss-120b leads
gpt-oss-120b: 33.5 (#256), Yi-Lightning: 27.4 (#320)
| Benchmark | gpt-oss-120b | Yi-Lightning |
|---|---|---|
| Aider Polyglot | 41.8% | 12.9% |
| LMArena Coding | 1380 | 1312 |
| SWE-bench Verified (bash only) | 26% | — |
| SciCode | 36% | — |
| WeirdML | 48.2% | — |
| ALE-Bench | 575.62 | — |
| AlgoTune | 1.41 | — |
Agentic & Tool Use Not comparable
gpt-oss-120b: 12.2 (#153), Yi-Lightning: —
| Benchmark | gpt-oss-120b | Yi-Lightning |
|---|---|---|
| Terminal-Bench | 18.7% | — |
| APEX-Agents | 4.4% | — |
| METR Time Horizons | 56.6% | — |
| Vending-Bench 2 | -21.53 | — |
Reasoning Yi-Lightning leads
gpt-oss-120b: 20.0 (#245), Yi-Lightning: 25.9 (#139)
| Benchmark | gpt-oss-120b | Yi-Lightning |
|---|---|---|
| LMArena Hard Prompts | 1364 | 1302 |
| SimpleBench | 22.1% | — |
| Kagi LLM Benchmark | 58.6% | — |
| CritPt | 1.1% | — |
| Chess Puzzles | 20% | — |
| Mystery Game Puzzles | 2% | — |
| DTBench | 76.3% | — |
| LMCA | 22.1% | — |
| Surface Evolver Bench | 25% | — |
| Epoch Capabilities Index | 139.93 | — |
Math gpt-oss-120b leads
gpt-oss-120b: 52.5 (#50), Yi-Lightning: 36.2 (#172)
| Benchmark | gpt-oss-120b | Yi-Lightning |
|---|---|---|
| LMArena Math | 1389 | 1300 |
| OTIS Mock AIME 2024-2025 | 88.9% | — |
| Omni-MATH | 68.8% | — |
Knowledge gpt-oss-120b leads
gpt-oss-120b: 42.4 (#96), Yi-Lightning: 35.4 (#185)
| Benchmark | gpt-oss-120b | Yi-Lightning |
|---|---|---|
| LMArena Expert | 1356 | 1286 |
| GPQA Diamond | 75.8% | — |
| MMLU-Pro | 79.5% | — |
| Confabulations | 15.7% | — |
| Vectara Hallucination Rate | 14.2% | — |
| GPQA (HELM) | 68.4% | — |
Multilingual gpt-oss-120b leads
gpt-oss-120b: 48.0 (#147), Yi-Lightning: 42.2 (#196)
| Benchmark | gpt-oss-120b | Yi-Lightning |
|---|---|---|
| LMArena Non-English | 1351 | 1269 |
| LMArena Chinese | 1385 | 1320 |
| LMArena French | 1369 | 1305 |
| LMArena German | 1353 | 1267 |
| LMArena Japanese | 1331 | 1228 |
| LMArena Korean | 1282 | 1192 |
| LMArena Russian | 1343 | 1255 |
| LMArena Spanish | 1389 | 1315 |
Instruction Following gpt-oss-120b leads
gpt-oss-120b: 69.3 (#173), Yi-Lightning: 67.4 (#196)
| Benchmark | gpt-oss-120b | Yi-Lightning |
|---|---|---|
| LMArena Instruction Following | 1318 | 1278 |
| IFEval | 83.6% | — |
Long Context Yi-Lightning leads
gpt-oss-120b: 31.4 (#278), Yi-Lightning: 39.4 (#181)
| Benchmark | gpt-oss-120b | Yi-Lightning |
|---|---|---|
| LMArena Longer Query | 1319 | 1297 |
| Fiction.LiveBench | 44.4% | — |
Writing & Preference Yi-Lightning leads
gpt-oss-120b: 46.5 (#217), Yi-Lightning: 50.2 (#184)
| Benchmark | gpt-oss-120b | Yi-Lightning |
|---|---|---|
| LMArena Text | 1365 | 1302 |
| LMArena Creative Writing | 1275 | 1280 |
| LMArena Multi-Turn | 1340 | 1311 |
| Short-Story Creative Writing | 77.1% | — |
| EQ-Bench Creative Writing | 961 | — |
| WildBench | 84.5% | — |
Frequently asked questions
Is gpt-oss-120b better than Yi-Lightning?
gpt-oss-120b and Yi-Lightning score almost the same on the Noometry Index (36.3 vs 37.1), so choose on price, context window or the category you care about most.
Is gpt-oss-120b or Yi-Lightning better for coding?
gpt-oss-120b scores higher on coding benchmarks: 33.5 versus 27.4 in the Noometry coding category.
How many benchmarks do gpt-oss-120b and Yi-Lightning share?
18 benchmarks have published results for both models. gpt-oss-120b has 48 scored results on Noometry and Yi-Lightning has 18.