DeepSeek-R1-Lite Preview vs GPT-5-Codex
DeepSeek DeepSeek-R1-Lite Preview | OpenAI GPT-5-Codex | |
|---|---|---|
| Overview | ||
| Company | DeepSeek | OpenAI |
| Release date | Nov 20 2024 | Sep 15 2025 |
| Access | Open Weight | Proprietary |
| Benchmarks | ||
Nonsense detection BullshitBench v2Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. | — | 39% |
| Timeline | ||
| Release gap | DeepSeek-R1-Lite Preview shipped 299 days before GPT-5-Codex | |
Which is better: DeepSeek-R1-Lite Preview or GPT-5-Codex?
DeepSeek-R1-Lite Preview and GPT-5-Codex don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. DeepSeek-R1-Lite Preview shipped 299 days before GPT-5-Codex, so benchmark comparisons should account for the intervening progress.
DeepSeek-R1-Lite Preview is open weight, while GPT-5-Codex is proprietary.
Direct benchmark comparisons are unavailable — DeepSeek-R1-Lite Preview and GPT-5-Codex don't publish scores on any of the same benchmarks.
Frequently asked questions
DeepSeek-R1-Lite Preview was released by DeepSeek on Nov 20 2024.
GPT-5-Codex was released by OpenAI on Sep 15 2025.
DeepSeek-R1-Lite Preview is an open weight model released by DeepSeek. GPT-5-Codex is a proprietary model released by OpenAI.
Other comparisons
DeepSeek-R1-Lite Preview vs Claude Sonnet 5GPT-5-Codex vs Claude Sonnet 5DeepSeek-R1-Lite Preview vs Gemini OmniGPT-5-Codex vs Gemini OmniDeepSeek-R1-Lite Preview vs Muse Spark 1.1GPT-5-Codex vs Muse Spark 1.1DeepSeek-R1-Lite Preview vs Grok 4.5GPT-5-Codex vs Grok 4.5DeepSeek-R1-Lite Preview vs Mistral Medium 3.5GPT-5-Codex vs Mistral Medium 3.5DeepSeek-R1-Lite Preview vs Kimi K2.7 CodeGPT-5-Codex vs Kimi K2.7 Code