DeepSeek Chat (R1-based) vs GPT-5.1-Codex-Max
DeepSeek DeepSeek Chat (R1-based) | OpenAI GPT-5.1-Codex-Max | |
|---|---|---|
| Overview | ||
| Company | DeepSeek | OpenAI |
| Release date | Jan 20 2025 | Nov 19 2025 |
| Access | Open Weight | Proprietary |
| Timeline | ||
| Release gap | DeepSeek Chat (R1-based) shipped 303 days before GPT-5.1-Codex-Max | |
Which is better: DeepSeek Chat (R1-based) or GPT-5.1-Codex-Max?
DeepSeek Chat (R1-based) and GPT-5.1-Codex-Max don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. DeepSeek Chat (R1-based) shipped 303 days before GPT-5.1-Codex-Max, so benchmark comparisons should account for the intervening progress.
DeepSeek Chat (R1-based) is open weight, while GPT-5.1-Codex-Max is proprietary.
Direct benchmark comparisons are unavailable — DeepSeek Chat (R1-based) and GPT-5.1-Codex-Max don't publish scores on any of the same benchmarks.
Frequently asked questions
DeepSeek Chat (R1-based) was released by DeepSeek on Jan 20 2025.
GPT-5.1-Codex-Max was released by OpenAI on Nov 19 2025.
DeepSeek Chat (R1-based) is an open weight model released by DeepSeek. GPT-5.1-Codex-Max is a proprietary model released by OpenAI.