Kimi K3 vs Gemini 3.8 Flash
Kimi K3 (Moonshot AI) and Gemini 3.8 Flash (Google) compared on price, context window, speed and independent benchmarks. Kimi K3 scores higher on the Artificial Analysis Intelligence Index (59.7 vs 58.7), while Gemini 3.8 Flash is 4.0× cheaper on a blended basis. Pick Kimi K3 for the hardest tasks and Gemini 3.8 Flash when cost dominates.
| Kimi K3 | Gemini 3.8 Flash | |
|---|---|---|
| Provider | Moonshot AI | |
| Input $/1M | $3.00 | $0.75 |
| Output $/1M | $15.0 | $3.75 |
| Blended $/1M (3:1) | $6.00 | $1.50 |
| Cached input $/1M | $0.30 | $0.07 |
| Context window | 1.0M | 1.0M |
| Knowledge cutoff | — | — |
| License | open weights | proprietary |
| Speed (tok/s) | 38 | 417 |
| Artificial Analysis Intelligence Index | 59.7 | 58.7 |
| LMArena Elo | 1476 | — |
| GPQA Diamond | 93.5% | 95.3% |
| SWE-bench Verified | 93.4% | — |
| Humanity's Last Exam | 46.9% | 47.8% |
| MMMU | 81.6% | — |