Model comparison
Kimi K2 Thinking Turbo vs Yi-Lightning
Kimi K2 Thinking Turbo is the stronger model overall, scoring 45.4 to 36.5 on the Noometry Index.
Last verified . 17 shared benchmarks.
Summary
- They share 17 benchmarks with published results for both. Kimi K2 Thinking Turbo scores higher in 8 categories and Yi-Lightning in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Kimi K2 Thinking Turbo leads 50.9 to 34.8.
- Kimi K2 Thinking Turbo has downloadable open weights; the other is API-only.
Side by side
| Kimi K2 Thinking Turbo | Yi-Lightning | |
|---|---|---|
| Provider | Moonshot AI | 01.AI |
| Noometry Index | 45.4 | 36.5 |
| Released | 2025-11-06 | 2024-12-02 |
| Weights | Open | Proprietary |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 21 | 18 |
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Category by category
Coding Kimi K2 Thinking Turbo leads
Kimi K2 Thinking Turbo: 38.1 (#166), Yi-Lightning: 27.0 (#315)
| Benchmark | Kimi K2 Thinking Turbo | Yi-Lightning |
|---|---|---|
| LMArena Coding | 1454 | 1313 |
| Aider Polyglot | — | 12.9% |
| LMArena WebDev | 1322 | — |
Reasoning Kimi K2 Thinking Turbo leads
Kimi K2 Thinking Turbo: 31.4 (#72), Yi-Lightning: 24.9 (#137)
| Benchmark | Kimi K2 Thinking Turbo | Yi-Lightning |
|---|---|---|
| LMArena Hard Prompts | 1428 | 1302 |
| Chess Puzzles | 20% | — |
Math Kimi K2 Thinking Turbo leads
Kimi K2 Thinking Turbo: 45.5 (#62), Yi-Lightning: 33.5 (#173)
| Benchmark | Kimi K2 Thinking Turbo | Yi-Lightning |
|---|---|---|
| LMArena Math | 1429 | 1300 |
| OTIS Mock AIME 2024-2025 | 83.1% | — |
Knowledge Kimi K2 Thinking Turbo leads
Kimi K2 Thinking Turbo: 50.9 (#64), Yi-Lightning: 34.8 (#182)
| Benchmark | Kimi K2 Thinking Turbo | Yi-Lightning |
|---|---|---|
| LMArena Expert | 1439 | 1286 |
| GPQA Diamond | 84.2% | — |
Multilingual Kimi K2 Thinking Turbo leads
Kimi K2 Thinking Turbo: 51.6 (#104), Yi-Lightning: 42.4 (#191)
| Benchmark | Kimi K2 Thinking Turbo | Yi-Lightning |
|---|---|---|
| LMArena Non-English | 1398 | 1269 |
| LMArena Chinese | 1457 | 1320 |
| LMArena French | 1425 | 1304 |
| LMArena German | 1390 | 1267 |
| LMArena Japanese | 1356 | 1228 |
| LMArena Korean | 1329 | 1192 |
| LMArena Russian | 1390 | 1255 |
| LMArena Spanish | 1407 | 1315 |
Instruction Following Kimi K2 Thinking Turbo leads
Kimi K2 Thinking Turbo: 74.2 (#103), Yi-Lightning: 67.6 (#191)
| Benchmark | Kimi K2 Thinking Turbo | Yi-Lightning |
|---|---|---|
| LMArena Instruction Following | 1403 | 1278 |
Long Context Kimi K2 Thinking Turbo leads
Kimi K2 Thinking Turbo: 43.2 (#99), Yi-Lightning: 39.4 (#176)
| Benchmark | Kimi K2 Thinking Turbo | Yi-Lightning |
|---|---|---|
| LMArena Longer Query | 1415 | 1297 |
Writing & Preference Kimi K2 Thinking Turbo leads
Kimi K2 Thinking Turbo: 60.2 (#99), Yi-Lightning: 50.4 (#178)
| Benchmark | Kimi K2 Thinking Turbo | Yi-Lightning |
|---|---|---|
| LMArena Text | 1415 | 1302 |
| LMArena Creative Writing | 1373 | 1280 |
| LMArena Multi-Turn | 1414 | 1311 |
Frequently asked questions
Is Kimi K2 Thinking Turbo better than Yi-Lightning?
Kimi K2 Thinking Turbo is the stronger model overall, scoring 45.4 to 36.5 on the Noometry Index.
Is Kimi K2 Thinking Turbo or Yi-Lightning better for coding?
Kimi K2 Thinking Turbo scores higher on coding benchmarks: 38.1 versus 27.0 in the Noometry coding category.
How many benchmarks do Kimi K2 Thinking Turbo and Yi-Lightning share?
17 benchmarks have published results for both models. Kimi K2 Thinking Turbo has 21 scored results on Noometry and Yi-Lightning has 18.