Gemini 2.5 Flash vs GPT-4o
Google Gemini 2.5 Flash | OpenAI GPT-4o | |
|---|---|---|
| Overview | ||
| Company | OpenAI | |
| Release date | Apr 17 2025 | May 13 2024 |
| 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. | 19%Best | 12% |
| Timeline | ||
| Release gap | GPT-4o shipped 339 days before Gemini 2.5 Flash | |
Which is better: Gemini 2.5 Flash or GPT-4o?
Gemini 2.5 Flash leads GPT-4o on 1 of the 1 benchmark they both report (BullshitBench v2). GPT-4o shipped 339 days before Gemini 2.5 Flash, 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, Gemini 2.5 Flash leads at 19% vs GPT-4o at 12%.
Frequently asked questions
Gemini 2.5 Flash was released by Google on Apr 17 2025.
GPT-4o was released by OpenAI on May 13 2024.
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