Model comparison
Grok 4.1 vs Yi-Lightning
Grok 4.1 is the stronger model overall, scoring 41.5 to 37.1 on the Noometry Index.
Last verified . 17 shared benchmarks.
Summary
- They share 17 benchmarks with published results for both. Grok 4.1 scores higher in 8 categories and Yi-Lightning in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Grok 4.1 leads 62.4 to 50.2.
Side by side
| Grok 4.1 | Yi-Lightning | |
|---|---|---|
| Provider | xAI | 01.AI |
| Noometry Index | 41.5 | 37.1 |
| Released | 2025-11-17 | 2024-12-02 |
| Weights | Proprietary | Proprietary |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 19 | 18 |
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Category by category
Coding Grok 4.1 leads
Grok 4.1: 33.7 (#253), Yi-Lightning: 27.4 (#320)
| Benchmark | Grok 4.1 | Yi-Lightning |
|---|---|---|
| LMArena Coding | 1445 | 1312 |
| Aider Polyglot | — | 12.9% |
| LMArena WebDev | 1214 | — |
Agentic & Tool Use Not comparable
Grok 4.1: 34.1 (#49), Yi-Lightning: —
| Benchmark | Grok 4.1 | Yi-Lightning |
|---|---|---|
| Cybench | 39% | — |
Reasoning Grok 4.1 leads
Grok 4.1: 29.5 (#91), Yi-Lightning: 25.9 (#139)
| Benchmark | Grok 4.1 | Yi-Lightning |
|---|---|---|
| LMArena Hard Prompts | 1435 | 1302 |
Math Grok 4.1 leads
Grok 4.1: 38.9 (#120), Yi-Lightning: 36.2 (#172)
| Benchmark | Grok 4.1 | Yi-Lightning |
|---|---|---|
| LMArena Math | 1422 | 1300 |
Knowledge Grok 4.1 leads
Grok 4.1: 39.5 (#133), Yi-Lightning: 35.4 (#185)
| Benchmark | Grok 4.1 | Yi-Lightning |
|---|---|---|
| LMArena Expert | 1417 | 1286 |
Multilingual Grok 4.1 leads
Grok 4.1: 53.4 (#68), Yi-Lightning: 42.2 (#196)
| Benchmark | Grok 4.1 | Yi-Lightning |
|---|---|---|
| LMArena Non-English | 1425 | 1269 |
| LMArena Chinese | 1465 | 1320 |
| LMArena French | 1448 | 1305 |
| LMArena German | 1446 | 1267 |
| LMArena Japanese | 1397 | 1228 |
| LMArena Korean | 1407 | 1192 |
| LMArena Russian | 1434 | 1255 |
| LMArena Spanish | 1438 | 1315 |
Instruction Following Grok 4.1 leads
Grok 4.1: 73.8 (#111), Yi-Lightning: 67.4 (#196)
| Benchmark | Grok 4.1 | Yi-Lightning |
|---|---|---|
| LMArena Instruction Following | 1400 | 1278 |
Long Context Grok 4.1 leads
Grok 4.1: 43.2 (#100), Yi-Lightning: 39.4 (#181)
| Benchmark | Grok 4.1 | Yi-Lightning |
|---|---|---|
| LMArena Longer Query | 1416 | 1297 |
Writing & Preference Grok 4.1 leads
Grok 4.1: 62.4 (#75), Yi-Lightning: 50.2 (#184)
| Benchmark | Grok 4.1 | Yi-Lightning |
|---|---|---|
| LMArena Text | 1437 | 1302 |
| LMArena Creative Writing | 1411 | 1280 |
| LMArena Multi-Turn | 1437 | 1311 |
Frequently asked questions
Is Grok 4.1 better than Yi-Lightning?
Grok 4.1 is the stronger model overall, scoring 41.5 to 37.1 on the Noometry Index.
Is Grok 4.1 or Yi-Lightning better for coding?
Grok 4.1 scores higher on coding benchmarks: 33.7 versus 27.4 in the Noometry coding category.
How many benchmarks do Grok 4.1 and Yi-Lightning share?
17 benchmarks have published results for both models. Grok 4.1 has 19 scored results on Noometry and Yi-Lightning has 18.