Kimi K2 Thinking
ECI#79
146Kimi K2 Thinking is an open-weights model from Moonshot, released November 6, 2025. It has an ECI score of 146 and ranks 79th of 257 tracked models. At the time of its release, it ranked 7th of 169 tracked models.
Kimi K2 Thinking vs select alternatives
| Domain | Benchmark | Kimi K2 Thinking | |||
|---|---|---|---|---|---|
ECI scoreBest score 167 | 146 | 140 | 146 | 147 | |
| Ranking | #79 | #116 | #76 | #70 | |
| Games | Chess PuzzlesBest score 72% | ||||
| Long context | CL-benchBest score 28% | ||||
| Mathematics | OTIS Mock AIME 2024-2025Best score 100% | ||||
| Science | GPQA DiamondBest score 96% | ||||
| Software engineering | METR Time HorizonsBest score 17 hr 25 min | 54 min 12 sec | — | — | 2 hr 2 min |
Text Arena (Coding)Best score 1820 | 1337 | — | 1325 | 1391 | |
ALE-BenchBest score 2951 | 598 | — | — | 796 | |
Terminal-Bench 2.0Best score 85% | |||||
WeirdML (v2)Best score 94% |
