Gemini 2.5 Flash vs Gemini 3.1 Flash
Google Gemini 2.5 Flash | Google Gemini 3.1 Flash | |
|---|---|---|
| Overview | ||
| Company | ||
| Release date | Apr 17 2025 | Feb 26 2026 |
| 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% | — |
| Timeline | ||
| Release gap | Gemini 2.5 Flash shipped 315 days before Gemini 3.1 Flash | |
Which is better: Gemini 2.5 Flash or Gemini 3.1 Flash?
Gemini 2.5 Flash and Gemini 3.1 Flash don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Gemini 2.5 Flash shipped 315 days before Gemini 3.1 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.
Direct benchmark comparisons are unavailable — Gemini 2.5 Flash and Gemini 3.1 Flash don't publish scores on any of the same benchmarks.
Frequently asked questions
Gemini 2.5 Flash was released by Google on Apr 17 2025.
Gemini 3.1 Flash was released by Google on Feb 26 2026.
Other comparisons
Gemini 2.5 Flash vs Claude Sonnet 5Gemini 3.1 Flash vs Claude Sonnet 5Gemini 2.5 Flash vs GPT-5.6 SolGemini 3.1 Flash vs GPT-5.6 SolGemini 2.5 Flash vs Muse Spark 1.1Gemini 3.1 Flash vs Muse Spark 1.1Gemini 2.5 Flash vs Grok 4.5Gemini 3.1 Flash vs Grok 4.5Gemini 2.5 Flash vs DeepSeek-V4-ProGemini 3.1 Flash vs DeepSeek-V4-ProGemini 2.5 Flash vs Mistral Medium 3.5Gemini 3.1 Flash vs Mistral Medium 3.5