Model comparison
Kimi K2.5 Instant vs Yi-Lightning
Kimi K2.5 Instant is the stronger model overall, scoring 43.6 to 37.1 on the Noometry Index.
Last verified . 16 shared benchmarks.
Summary
- They share 16 benchmarks with published results for both. Kimi K2.5 Instant scores higher in 8 categories and Yi-Lightning in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in coding, where Kimi K2.5 Instant leads 42.6 to 27.4.
- Kimi K2.5 Instant has downloadable open weights; the other is API-only.
Side by side
| Kimi K2.5 Instant | Yi-Lightning | |
|---|---|---|
| Provider | Moonshot AI | 01.AI |
| Noometry Index | 43.6 | 37.1 |
| Released | — | 2024-12-02 |
| Weights | Open | Proprietary |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 18 | 18 |
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Category by category
Coding Kimi K2.5 Instant leads
Kimi K2.5 Instant: 42.6 (#97), Yi-Lightning: 27.4 (#320)
| Benchmark | Kimi K2.5 Instant | Yi-Lightning |
|---|---|---|
| LMArena Coding | 1484 | 1312 |
| Aider Polyglot | — | 12.9% |
| LMArena WebDev | 1404 | — |
Reasoning Kimi K2.5 Instant leads
Kimi K2.5 Instant: 29.7 (#90), Yi-Lightning: 25.9 (#139)
| Benchmark | Kimi K2.5 Instant | Yi-Lightning |
|---|---|---|
| LMArena Hard Prompts | 1443 | 1302 |
Math Kimi K2.5 Instant leads
Kimi K2.5 Instant: 39.4 (#105), Yi-Lightning: 36.2 (#172)
| Benchmark | Kimi K2.5 Instant | Yi-Lightning |
|---|---|---|
| LMArena Math | 1442 | 1300 |
Knowledge Kimi K2.5 Instant leads
Kimi K2.5 Instant: 40.2 (#123), Yi-Lightning: 35.4 (#185)
| Benchmark | Kimi K2.5 Instant | Yi-Lightning |
|---|---|---|
| LMArena Expert | 1440 | 1286 |
Multimodal Not comparable
Kimi K2.5 Instant: 40.2 (#50), Yi-Lightning: —
| Benchmark | Kimi K2.5 Instant | Yi-Lightning |
|---|---|---|
| LMArena Vision | 1254 | — |
Multilingual Kimi K2.5 Instant leads
Kimi K2.5 Instant: 52.0 (#94), Yi-Lightning: 42.2 (#196)
| Benchmark | Kimi K2.5 Instant | Yi-Lightning |
|---|---|---|
| LMArena Non-English | 1406 | 1269 |
| LMArena Chinese | 1449 | 1320 |
| LMArena French | 1403 | 1305 |
| LMArena German | 1413 | 1267 |
| LMArena Korean | 1378 | 1192 |
| LMArena Russian | 1404 | 1255 |
| LMArena Spanish | 1447 | 1315 |
| LMArena Japanese | — | 1228 |
Instruction Following Kimi K2.5 Instant leads
Kimi K2.5 Instant: 75.3 (#65), Yi-Lightning: 67.4 (#196)
| Benchmark | Kimi K2.5 Instant | Yi-Lightning |
|---|---|---|
| LMArena Instruction Following | 1430 | 1278 |
Long Context Kimi K2.5 Instant leads
Kimi K2.5 Instant: 43.9 (#83), Yi-Lightning: 39.4 (#181)
| Benchmark | Kimi K2.5 Instant | Yi-Lightning |
|---|---|---|
| LMArena Longer Query | 1435 | 1297 |
Writing & Preference Kimi K2.5 Instant leads
Kimi K2.5 Instant: 60.6 (#95), Yi-Lightning: 50.2 (#184)
| Benchmark | Kimi K2.5 Instant | Yi-Lightning |
|---|---|---|
| LMArena Text | 1420 | 1302 |
| LMArena Creative Writing | 1381 | 1280 |
| LMArena Multi-Turn | 1427 | 1311 |
Frequently asked questions
Is Kimi K2.5 Instant better than Yi-Lightning?
Kimi K2.5 Instant is the stronger model overall, scoring 43.6 to 37.1 on the Noometry Index.
Is Kimi K2.5 Instant or Yi-Lightning better for coding?
Kimi K2.5 Instant scores higher on coding benchmarks: 42.6 versus 27.4 in the Noometry coding category.
How many benchmarks do Kimi K2.5 Instant and Yi-Lightning share?
16 benchmarks have published results for both models. Kimi K2.5 Instant has 18 scored results on Noometry and Yi-Lightning has 18.