Gemini 3.1 Flash-Lite vs GPT-5-Codex
Google Gemini 3.1 Flash-Lite | OpenAI GPT-5-Codex | |
|---|---|---|
| Overview | ||
| Company | OpenAI | |
| Release date | Mar 3 2026 | Sep 15 2025 |
| Access | Proprietary | 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. | 11% | 39%Best |
| Timeline | ||
| Release gap | GPT-5-Codex shipped 169 days before Gemini 3.1 Flash-Lite | |
Which is better: Gemini 3.1 Flash-Lite or GPT-5-Codex?
GPT-5-Codex leads Gemini 3.1 Flash-Lite on 1 of the 1 benchmark they both report (BullshitBench v2). GPT-5-Codex shipped 169 days before Gemini 3.1 Flash-Lite, so benchmark comparisons should account for the intervening progress.
Published specifications for these two models are limited — see each model page for the latest details.
On BullshitBench v2, GPT-5-Codex leads at 39% vs Gemini 3.1 Flash-Lite at 11%.
Frequently asked questions
Gemini 3.1 Flash-Lite was released by Google on Mar 3 2026.
GPT-5-Codex was released by OpenAI on Sep 15 2025.
Other comparisons
Gemini 3.1 Flash-Lite vs Claude Sonnet 5GPT-5-Codex vs Claude Sonnet 5Gemini 3.1 Flash-Lite vs Muse Spark 1.1GPT-5-Codex vs Muse Spark 1.1Gemini 3.1 Flash-Lite vs Grok 4.5GPT-5-Codex vs Grok 4.5Gemini 3.1 Flash-Lite vs DeepSeek-V4-ProGPT-5-Codex vs DeepSeek-V4-ProGemini 3.1 Flash-Lite vs Mistral Medium 3.5GPT-5-Codex vs Mistral Medium 3.5Gemini 3.1 Flash-Lite vs Kimi K2.7 CodeGPT-5-Codex vs Kimi K2.7 Code