LLaMA 3.1vsGPT-5-Codex
LLaMA 3.1 | GPT-5-Codex | |
|---|---|---|
| API pricingUSD per 1M tokens · lower wins | ||
Cheapest inputLowest input rate across third-party providers, excluding the lab itself. The cheapest endpoint may run a quantised build or a shorter context — see "Available from" on the model page. | $0.02Novita | — |
Cheapest outputLowest output rate across third-party providers, excluding the lab itself. May come from a different provider than the cheapest input. | $0.05Novita | — |
| Benchmarks | ||
BullshitBench v2Nonsense detection — Given 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. | 14% | 39% |
| Overview | ||
| Company | Meta | OpenAI |
| Release date | Jul 23 2024 | Sep 15 2025 |
| Access | Open Weight | Proprietary |
Other comparisons
LLaMA 3.1vsClaude Opus 5GPT-5-CodexvsClaude Opus 5LLaMA 3.1vsGemini 3.7 FlashGPT-5-CodexvsGemini 3.7 FlashLLaMA 3.1vsGrok 4.6GPT-5-CodexvsGrok 4.6LLaMA 3.1vsDeepSeek-V4-Pro-0813GPT-5-CodexvsDeepSeek-V4-Pro-0813LLaMA 3.1vsMistral Medium 3.5GPT-5-CodexvsMistral Medium 3.5LLaMA 3.1vsKimi K3GPT-5-CodexvsKimi K3
Frequently asked questions
GPT-5-Codex leads LLaMA 3.1 on 1 of the 1 benchmark they both report (BullshitBench v2). LLaMA 3.1 shipped 419 days before GPT-5-Codex, so benchmark comparisons should account for the intervening progress.
LLaMA 3.1 is open weight, while GPT-5-Codex is proprietary.
On BullshitBench v2, GPT-5-Codex leads at 39% vs LLaMA 3.1 at 14%.
LLaMA 3.1 was released by Meta on Jul 23 2024.
GPT-5-Codex was released by OpenAI on Sep 15 2025.
LLaMA 3.1 is an open weight model released by Meta. GPT-5-Codex is a proprietary model released by OpenAI.