GPT-5.1 Codex Max is the newer model, released after DeepSeek R1 0528.
| Spec | DeepSeek R1 0528 | GPT-5.1 Codex Max |
|---|---|---|
| Input price | Free | — |
| Output price | Free | — |
| Context window | 164K tokens | — |
| Released | May 2025 | Dec 2025 |
| SWE-bench Verified | 57.6% | 77.9% |
Not enough votes to call it. On the specs, nothing separates them.
GPT-5.1 Codex Max uses 2.6x more transitions
GPT-5.1 Codex Max is the newer model, released after DeepSeek R1 0528.
| Spec | DeepSeek R1 0528 | GPT-5.1 Codex Max |
|---|---|---|
| Input price | Free | — |
| Output price | Free | — |
| Context window | 164K tokens | — |
| Released | May 2025 | Dec 2025 |
| SWE-bench Verified | 57.6% | 77.9% |
Not enough votes to call it. On the specs, nothing separates them.
GPT-5.1 Codex Max uses 2.6x more transitions