GPT-5.6 Sol vs Kimi K2.6
GPT-5.6 Sol vs Kimi K2.6: which AI model is cheaper, has the larger context window and more capabilities? Side-by-side comparison updated daily.
Quick verdict
- Kimi K2.6 is 3.0× cheaper than GPT-5.6 Sol for the same mix of input and output tokens.
- GPT-5.6 Sol has the larger context window (1.1M), useful for long documents and big codebases.
- GPT-5.6 Sol is the more recent release (Jul 9, 2026).
- Only Kimi K2.6 has openly published weights you can run yourself.
- GPT-5.6 Sol scores higher on independent tests (overall index 162.0 vs 151.0).
- Choose Kimi K2.6 if cost matters most; choose GPT-5.6 Sol if you need its specific strengths above. For the best results, test both on your own prompts.
| GPT-5.6 Sol | Kimi K2.6 | |
|---|---|---|
| Company | OpenAI | Moonshot AI |
| Released | Jul 9, 2026 ● | Apr 20, 2026 |
| Overall index | 162.0 ● | 151.0 |
| SWE-bench Verified | — | 76.7% |
| GPQA Diamond | 93.5% ● | 90.8% |
| AIME math | 100% ● | 96.1% |
| FrontierMath | 89.1% ● | 57.2% |
| SimpleQA Verified | 69.7% ● | 34.9% |
| Input (per 1M tokens) | $2 | $0.65 ● |
| Output (per 1M tokens) | $10 | $3.41 ● |
| Cost for 1M input + 1M output tokens | $12.00 | $4.06 ● |
| Providers | 7 | 18 ● |
| Context | 1.1M ● | 256K |
| Max output | 128K | 236K ● |
| Inputs | Files, Image, Text ● | Text, Image |
| Outputs | Text | Text |
| Reasoning | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Open weights | — | ✓ |