DeepSeek V3-0324 vs GPT-5-Codex
DeepSeek DeepSeek V3-0324 | OpenAI GPT-5-Codex | |
|---|---|---|
| Overview | ||
| Company | DeepSeek | OpenAI |
| Release date | Mar 24 2025 | 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 V3-0324 shipped 175 days before GPT-5-Codex | |
Which is better: DeepSeek V3-0324 or GPT-5-Codex?
DeepSeek V3-0324 and GPT-5-Codex don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. DeepSeek V3-0324 shipped 175 days before GPT-5-Codex, so benchmark comparisons should account for the intervening progress.
DeepSeek V3-0324 is open weight, while GPT-5-Codex is proprietary.
Direct benchmark comparisons are unavailable — DeepSeek V3-0324 and GPT-5-Codex don't publish scores on any of the same benchmarks.
Frequently asked questions
DeepSeek V3-0324 was released by DeepSeek on Mar 24 2025.
GPT-5-Codex was released by OpenAI on Sep 15 2025.
DeepSeek V3-0324 is an open weight model released by DeepSeek. GPT-5-Codex is a proprietary model released by OpenAI.
Other comparisons
DeepSeek V3-0324 vs Claude Sonnet 5GPT-5-Codex vs Claude Sonnet 5DeepSeek V3-0324 vs Gemini OmniGPT-5-Codex vs Gemini OmniDeepSeek V3-0324 vs Muse Spark 1.1GPT-5-Codex vs Muse Spark 1.1DeepSeek V3-0324 vs Grok 4.5GPT-5-Codex vs Grok 4.5DeepSeek V3-0324 vs Mistral Medium 3.5GPT-5-Codex vs Mistral Medium 3.5DeepSeek V3-0324 vs Kimi K2.7 CodeGPT-5-Codex vs Kimi K2.7 Code