Model comparison
Llama 4 Scout vs Yi-Lightning
Yi-Lightning is the stronger model overall, scoring 37.1 to 27.7 on the Noometry Index.
Last verified . 17 shared benchmarks.
MetaSummary
- They share 17 benchmarks with published results for both. Llama 4 Scout scores higher in 0 categories and Yi-Lightning in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Yi-Lightning leads 25.9 to 9.1.
- Llama 4 Scout has downloadable open weights; the other is API-only.
Side by side
| Llama 4 Scout | Yi-Lightning | |
|---|---|---|
| Provider | Meta | 01.AI |
| Noometry Index | 27.7 | 37.1 |
| Released | 2025-04-05 | 2024-12-02 |
| Weights | Open | Proprietary |
| Context window | 128K | — |
| Max output | 4K | — |
| Input $ / M tokens | $0.10 | — |
| Output $ / M tokens | $0.30 | — |
| Results tracked | 43 | 18 |
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Category by category
Coding Yi-Lightning leads
Llama 4 Scout: 20.2 (#339), Yi-Lightning: 27.4 (#320)
| Benchmark | Llama 4 Scout | Yi-Lightning |
|---|---|---|
| LMArena Coding | 1286 | 1312 |
| SWE-bench Verified (bash only) | 9.1% | — |
| Aider Polyglot | — | 12.9% |
| SciCode | 17% | — |
| BigCodeBench Complete | 43.1% | — |
Agentic & Tool Use Not comparable
Llama 4 Scout: 24.6 (#119), Yi-Lightning: —
| Benchmark | Llama 4 Scout | Yi-Lightning |
|---|---|---|
| Berkeley Function Calling Leaderboard | 28.1% | — |
Reasoning Yi-Lightning leads
Llama 4 Scout: 9.1 (#345), Yi-Lightning: 25.9 (#139)
| Benchmark | Llama 4 Scout | Yi-Lightning |
|---|---|---|
| LMArena Hard Prompts | 1266 | 1302 |
| ARC-AGI-2 | 0% | — |
| Kagi LLM Benchmark | 36.9% | — |
| ARC-AGI-1 | 0.5% | — |
| CritPt | 0% | — |
| DTBench | 57.9% | — |
| LMCA | 12% | — |
| Epoch Capabilities Index | 129.64 | — |
| ForecastBench | 57.5 | — |
Math Yi-Lightning leads
Llama 4 Scout: 19.6 (#286), Yi-Lightning: 36.2 (#172)
| Benchmark | Llama 4 Scout | Yi-Lightning |
|---|---|---|
| LMArena Math | 1287 | 1300 |
| OTIS Mock AIME 2024-2025 | 7.8% | — |
| Omni-MATH | 37.3% | — |
| MATH Level 5 | 62.3% | — |
| FrontierMath (Feb 2025 set) | 0% | — |
Knowledge Yi-Lightning leads
Llama 4 Scout: 31.9 (#217), Yi-Lightning: 35.4 (#185)
| Benchmark | Llama 4 Scout | Yi-Lightning |
|---|---|---|
| LMArena Expert | 1235 | 1286 |
| GPQA Diamond | 51.8% | — |
| MMLU-Pro | 74.2% | — |
| Vectara Hallucination Rate | 7.7% | — |
| GPQA (HELM) | 50.7% | — |
Multimodal Not comparable
Llama 4 Scout: 32.2 (#102), Yi-Lightning: —
| Benchmark | Llama 4 Scout | Yi-Lightning |
|---|---|---|
| LMArena Vision | 1118 | — |
| SpatialViz-Bench | 34.2% | — |
Multilingual Yi-Lightning leads
Llama 4 Scout: 41.0 (#212), Yi-Lightning: 42.2 (#196)
| Benchmark | Llama 4 Scout | Yi-Lightning |
|---|---|---|
| LMArena Non-English | 1252 | 1269 |
| LMArena Chinese | 1255 | 1320 |
| LMArena French | 1282 | 1305 |
| LMArena German | 1272 | 1267 |
| LMArena Japanese | 1206 | 1228 |
| LMArena Korean | 1207 | 1192 |
| LMArena Russian | 1263 | 1255 |
| LMArena Spanish | 1278 | 1315 |
Instruction Following Yi-Lightning leads
Llama 4 Scout: 65.8 (#217), Yi-Lightning: 67.4 (#196)
| Benchmark | Llama 4 Scout | Yi-Lightning |
|---|---|---|
| LMArena Instruction Following | 1248 | 1278 |
| IFEval | 81.8% | — |
Long Context Yi-Lightning leads
Llama 4 Scout: 27.5 (#294), Yi-Lightning: 39.4 (#181)
| Benchmark | Llama 4 Scout | Yi-Lightning |
|---|---|---|
| LMArena Longer Query | 1265 | 1297 |
| Fiction.LiveBench | 36% | — |
Writing & Preference Yi-Lightning leads
Llama 4 Scout: 37.0 (#261), Yi-Lightning: 50.2 (#184)
| Benchmark | Llama 4 Scout | Yi-Lightning |
|---|---|---|
| LMArena Text | 1279 | 1302 |
| LMArena Creative Writing | 1249 | 1280 |
| LMArena Multi-Turn | 1280 | 1311 |
| EQ-Bench Creative Writing | 783 | — |
| WildBench | 78% | — |
Frequently asked questions
Is Llama 4 Scout better than Yi-Lightning?
Yi-Lightning is the stronger model overall, scoring 37.1 to 27.7 on the Noometry Index.
Is Llama 4 Scout or Yi-Lightning better for coding?
Yi-Lightning scores higher on coding benchmarks: 27.4 versus 20.2 in the Noometry coding category.
How many benchmarks do Llama 4 Scout and Yi-Lightning share?
17 benchmarks have published results for both models. Llama 4 Scout has 43 scored results on Noometry and Yi-Lightning has 18.