LLaMA 1 vs GPT-5-Codex
Meta LLaMA 1 | OpenAI GPT-5-Codex | |
|---|---|---|
| Overview | ||
| Company | Meta | OpenAI |
| Release date | Feb 24 2023 | 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 | LLaMA 1 shipped 934 days before GPT-5-Codex | |
Which is better: LLaMA 1 or GPT-5-Codex?
LLaMA 1 and GPT-5-Codex don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. LLaMA 1 shipped 934 days before GPT-5-Codex, so benchmark comparisons should account for the intervening progress.
LLaMA 1 is open weight, while GPT-5-Codex is proprietary.
Direct benchmark comparisons are unavailable — LLaMA 1 and GPT-5-Codex don't publish scores on any of the same benchmarks.
Frequently asked questions
LLaMA 1 was released by Meta on Feb 24 2023.
GPT-5-Codex was released by OpenAI on Sep 15 2025.
LLaMA 1 is an open weight model released by Meta. GPT-5-Codex is a proprietary model released by OpenAI.
Other comparisons
LLaMA 1 vs Claude Sonnet 5GPT-5-Codex vs Claude Sonnet 5LLaMA 1 vs Gemini OmniGPT-5-Codex vs Gemini OmniLLaMA 1 vs Grok 4.5GPT-5-Codex vs Grok 4.5LLaMA 1 vs DeepSeek-V4-ProGPT-5-Codex vs DeepSeek-V4-ProLLaMA 1 vs Mistral Medium 3.5GPT-5-Codex vs Mistral Medium 3.5LLaMA 1 vs Kimi K2.7 CodeGPT-5-Codex vs Kimi K2.7 Code