# GPT-5.1 Codex Max: AI model fact sheet

- **Provider:** openai
- **Released:** 2025-12-04
- **OpenRouter ID:** openai/gpt-5.1-codex-max
- **Capabilities:** conversation, reasoning, code-generation, analysis

GPT-5.1 Codex Max model integrated via automation on 2025-12-04

## Benchmarks

| Benchmark | Score |
| --- | --- |
| SWE-bench Verified | 77.9% |

Source: real side-by-side outputs, pricing and specs at https://rival.tips/models/gpt-5.1-codex-max