GPT-5.1 Codex Max is the newer model, released after Kimi K2.
| Spec | GPT-5.1 Codex Max | Kimi K2 |
|---|---|---|
| Input price | — | $0.57/M tokens |
| Output price | — | $2.3/M tokens |
| Released | Dec 2025 | Jul 2025 |
| SWE-bench Verified | 77.9% | 65.8% |
Not enough votes to call it. On the specs, GPT-5.1 Codex Max has the edge: newer, major provider backing.
Kimi K2 uses 68.5x more emoji
GPT-5.1 Codex Max is the newer model, released after Kimi K2.
| Spec | GPT-5.1 Codex Max | Kimi K2 |
|---|---|---|
| Input price | — | $0.57/M tokens |
| Output price | — | $2.3/M tokens |
| Released | Dec 2025 | Jul 2025 |
| SWE-bench Verified | 77.9% | 65.8% |
Not enough votes to call it. On the specs, GPT-5.1 Codex Max has the edge: newer, major provider backing.
Kimi K2 uses 68.5x more emoji