Hy4 Preview is the newer model, released after GPT-5.1 Codex Max.
| Spec | GPT-5.1 Codex Max | Hy4 Preview |
|---|---|---|
| Input price | — | $0.834/M tokens |
| Output price | — | $2.501/M tokens |
| Context window | — | 1.0M tokens |
| Released | Dec 2025 | Aug 2026 |
Not enough votes to call it. On the specs, nothing separates them.
Hy4 Preview uses 40.1x more emoji
Hy4 Preview is the newer model, released after GPT-5.1 Codex Max.
| Spec | GPT-5.1 Codex Max | Hy4 Preview |
|---|---|---|
| Input price | — | $0.834/M tokens |
| Output price | — | $2.501/M tokens |
| Context window | — | 1.0M tokens |
| Released | Dec 2025 | Aug 2026 |
Not enough votes to call it. On the specs, nothing separates them.
Hy4 Preview uses 40.1x more emoji