GPT 5.1 3 versions
By OpenAI
| Model | Released | Type | Arch | Params (B) | Context | Open | Status |
|---|---|---|---|---|---|---|---|
| gpt-5.1-codex-max | Sep 17, 2025 | Text LLM | MoE | Not disclosed | 400K | Closed | Active |
| gpt-5.1-2025-11-12 | Nov 12, 2025 | Multimodal | MoE | Not disclosed | 400K | Closed | Active |
| GPT-5.1-mini | Nov 12, 2025 | Text LLM | Unknown | Not disclosed | 400K | Closed | Active |