GPT-5.6 Sol vs Kimi K3
GPT-5.6 Sol (OpenAI) and Kimi K3 (Moonshot AI) compared on price, context window, speed and independent benchmarks. GPT-5.6 Sol scores higher on the Artificial Analysis Intelligence Index (60.9 vs 59.7), while Kimi K3 is 1.3× cheaper on a blended basis. Pick GPT-5.6 Sol for the hardest tasks and Kimi K3 when cost dominates.
| GPT-5.6 Sol | Kimi K3 | |
|---|---|---|
| Provider | OpenAI | Moonshot AI |
| Input $/1M | $4.00 | $3.00 |
| Output $/1M | $20.0 | $15.0 |
| Blended $/1M (3:1) | $8.00 | $6.00 |
| Cached input $/1M | $0.40 | $0.30 |
| Context window | 1.1M | 1.0M |
| Knowledge cutoff | 2026-02 | — |
| License | proprietary | open weights |
| Speed (tok/s) | 81 | 38 |
| Artificial Analysis Intelligence Index | 60.9 | 59.7 |
| LMArena Elo | 1455 | 1476 |
| GPQA Diamond | 94.1% | 93.5% |
| SWE-bench Verified | — | 93.4% |
| Humanity's Last Exam | 49.5% | 46.9% |
| MMMU | — | 81.6% |