GPT-5.1-Codex-Max vs Kimi K2.5
OpenAI vs Moonshot AI — benchmarks, pricing, and capabilities side by side.
- •Kimi K2.5 is cheaper ($0.40 vs $1.25 per 1M input)
- •GPT-5.1-Codex-Max has a larger context window (400K)
| GPT-5.1-Codex-Max | Kimi K2.5 | |
|---|---|---|
| Intelligence index | — | 87.9 |
| Developer | OpenAI | Moonshot AI |
| Type | Multimodal | Multimodal |
| Access | API only | Open weights |
| Context window | 400,000 tokens | 262,144 tokens |
| Input price | $1.25 / 1M | $0.40 / 1M |
| Output price | $10.00 / 1M | $1.90 / 1M |
| Speed | — | 35 tok/s |
| Released | December 4, 2025 | January 27, 2026 |
| Parameters | — | 1T (32B active) |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |