GPT-5.1 Codex Max is the newer model, released after Gemini 2.5 Pro Experimental.
| Spec | Gemini 2.5 Pro Experimental | GPT-5.1 Codex Max |
|---|---|---|
| Input price | $1/M tokens | — |
| Output price | $2/M tokens | — |
| Context window | 1.0M tokens | — |
| Released | Mar 2025 | Dec 2025 |
| SWE-bench Verified | 63.8% | 77.9% |
Not enough votes to call it. On the specs, nothing separates them.
Gemini 2.5 Pro Experimental uses 6.6x more transitions
GPT-5.1 Codex Max is the newer model, released after Gemini 2.5 Pro Experimental.
| Spec | Gemini 2.5 Pro Experimental | GPT-5.1 Codex Max |
|---|---|---|
| Input price | $1/M tokens | — |
| Output price | $2/M tokens | — |
| Context window | 1.0M tokens | — |
| Released | Mar 2025 | Dec 2025 |
| SWE-bench Verified | 63.8% | 77.9% |
Not enough votes to call it. On the specs, nothing separates them.
Gemini 2.5 Pro Experimental uses 6.6x more transitions