Model comparison
o4-mini vs Yi-Lightning
o4-mini is the stronger model overall, scoring 41.6 to 37.1 on the Noometry Index.
Last verified . 18 shared benchmarks.
Summary
- They share 18 benchmarks with published results for both. o4-mini scores higher in 7 categories and Yi-Lightning in 1 category; 8 gaps are clear of the uncertainty.
- The widest gap is in coding, where o4-mini leads 40.9 to 27.4.
- The biggest single-benchmark swing is Aider Polyglot: 72% for o4-mini and 12.9% for Yi-Lightning.
Side by side
| o4-mini | Yi-Lightning | |
|---|---|---|
| Provider | OpenAI | 01.AI |
| Noometry Index | 41.6 | 37.1 |
| Released | 2025-04-16 | 2024-12-02 |
| Weights | Proprietary | Proprietary |
| Context window | 200K | — |
| Max output | 100K | — |
| Input $ / M tokens | $1.10 | — |
| Output $ / M tokens | $4.40 | — |
| Results tracked | 60 | 18 |
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Category by category
Coding o4-mini leads
o4-mini: 40.9 (#127), Yi-Lightning: 27.4 (#320)
| Benchmark | o4-mini | Yi-Lightning |
|---|---|---|
| Aider Polyglot | 72% | 12.9% |
| LMArena Coding | 1368 | 1312 |
| SWE-bench Verified (bash only) | 45% | — |
| GSO | 3.6% | — |
| WeirdML | 52.6% | — |
| CadEval | 62% | — |
| ALE-Bench | 826.17 | — |
| AlgoTune | 1.72 | — |
Agentic & Tool Use Not comparable
o4-mini: 32.6 (#61), Yi-Lightning: —
| Benchmark | o4-mini | Yi-Lightning |
|---|---|---|
| Berkeley Function Calling Leaderboard | 53.2% | — |
| GDPval | 25.3% | — |
| METR Time Horizons | 63.9% | — |
Reasoning Yi-Lightning leads
o4-mini: 24.6 (#162), Yi-Lightning: 25.9 (#139)
| Benchmark | o4-mini | Yi-Lightning |
|---|---|---|
| LMArena Hard Prompts | 1351 | 1302 |
| ARC-AGI-2 | 6.1% | — |
| SimpleBench | 38.7% | — |
| Kagi LLM Benchmark | 67.6% | — |
| ARC-AGI-1 | 58.7% | — |
| CritPt | 0.6% | — |
| Chess Puzzles | 26% | — |
| EnigmaEval | 9.2% | — |
| Mystery Game Puzzles | 5% | — |
| DTBench | 77.6% | — |
| LMCA | 26.5% | — |
| Epoch Capabilities Index | 145.64 | — |
| ForecastBench | 61.8 | — |
Math o4-mini leads
o4-mini: 40.8 (#89), Yi-Lightning: 36.2 (#172)
| Benchmark | o4-mini | Yi-Lightning |
|---|---|---|
| LMArena Math | 1389 | 1300 |
| FrontierMath (Tiers 1-3) | 36.1% | — |
| FrontierMath Tier 4 | 4.9% | — |
| OTIS Mock AIME 2024-2025 | 81.7% | — |
| Omni-MATH | 72% | — |
| MATH Level 5 | 97.8% | — |
| FrontierMath (Feb 2025 set) | 24.8% | — |
| FrontierMath Tier 4 (v1) | 6.3% | — |
Knowledge o4-mini leads
o4-mini: 43.6 (#91), Yi-Lightning: 35.4 (#185)
| Benchmark | o4-mini | Yi-Lightning |
|---|---|---|
| LMArena Expert | 1343 | 1286 |
| GPQA Diamond | 79.6% | — |
| Humanity's Last Exam | 18.1% | — |
| SimpleQA Verified | 19.6% | — |
| MMLU-Pro | 82% | — |
| Confabulations | 15.8% | — |
| Vectara Hallucination Rate | 18.6% | — |
| GPQA (HELM) | 73.5% | — |
Multimodal Not comparable
o4-mini: 40.2 (#49), Yi-Lightning: —
| Benchmark | o4-mini | Yi-Lightning |
|---|---|---|
| LMArena Vision | 1194 | — |
| GeoBench | 64% | — |
| VPCT | 57.5% | — |
Multilingual o4-mini leads
o4-mini: 47.0 (#154), Yi-Lightning: 42.2 (#196)
| Benchmark | o4-mini | Yi-Lightning |
|---|---|---|
| LMArena Non-English | 1337 | 1269 |
| LMArena Chinese | 1354 | 1320 |
| LMArena French | 1364 | 1305 |
| LMArena German | 1336 | 1267 |
| LMArena Japanese | 1308 | 1228 |
| LMArena Korean | 1312 | 1192 |
| LMArena Russian | 1334 | 1255 |
| LMArena Spanish | 1347 | 1315 |
Instruction Following o4-mini leads
o4-mini: 75.2 (#68), Yi-Lightning: 67.4 (#196)
| Benchmark | o4-mini | Yi-Lightning |
|---|---|---|
| LMArena Instruction Following | 1321 | 1278 |
| IFEval | 92.8% | — |
Long Context o4-mini leads
o4-mini: 45.5 (#33), Yi-Lightning: 39.4 (#181)
| Benchmark | o4-mini | Yi-Lightning |
|---|---|---|
| LMArena Longer Query | 1315 | 1297 |
| Fiction.LiveBench | 77.8% | — |
Writing & Preference o4-mini leads
o4-mini: 54.0 (#152), Yi-Lightning: 50.2 (#184)
| Benchmark | o4-mini | Yi-Lightning |
|---|---|---|
| LMArena Text | 1353 | 1302 |
| LMArena Creative Writing | 1294 | 1280 |
| LMArena Multi-Turn | 1350 | 1311 |
| Short-Story Creative Writing | 75% | — |
| WildBench | 85.4% | — |
Frequently asked questions
Is o4-mini better than Yi-Lightning?
o4-mini is the stronger model overall, scoring 41.6 to 37.1 on the Noometry Index.
Is o4-mini or Yi-Lightning better for coding?
o4-mini scores higher on coding benchmarks: 40.9 versus 27.4 in the Noometry coding category.
How many benchmarks do o4-mini and Yi-Lightning share?
18 benchmarks have published results for both models. o4-mini has 60 scored results on Noometry and Yi-Lightning has 18.