Gemini 1.5 Flash vs o3
Google Gemini 1.5 Flash | OpenAI o3 | |
|---|---|---|
| Overview | ||
| Company | OpenAI | |
| Release date | May 14 2024 | Apr 16 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. | — | 26% |
| Timeline | ||
| Release gap | Gemini 1.5 Flash shipped 337 days before o3 | |
Which is better: Gemini 1.5 Flash or o3?
Gemini 1.5 Flash and o3 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Gemini 1.5 Flash shipped 337 days before o3, 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.
Direct benchmark comparisons are unavailable — Gemini 1.5 Flash and o3 don't publish scores on any of the same benchmarks.
Frequently asked questions
Gemini 1.5 Flash was released by Google on May 14 2024.
o3 was released by OpenAI on Apr 16 2025.
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