Compare / Gemini 2.5 Flash vs Gemini 3.1 Pro Preview
Gemini 2.5 Flash vs Gemini 3.1 Pro Preview
10 results from 3 sources that measured both models. Each row is in the source's own units; there is no overall winner.
| Benchmark | Metric | Gemini 2.5 Flash | Gemini 3.1 Pro Preview |
|---|---|---|---|
| Arena (formerly LMArena)reported | OverallArena rating | 1,437 | 1,472 |
| Arena (formerly LMArena)reported | Business, management and financeArena rating | 1,399 | 1,477 |
| Arena (formerly LMArena)reported | Creative writingArena rating | 1,394 | 1,480 |
| Arena (formerly LMArena)reported | Expert promptsArena rating | 1,424 | 1,509 |
| Arena (formerly LMArena)reported | Instruction followingArena rating | 1,400 | 1,479 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,409 | 1,487 |
| Arena (formerly LMArena)reported | Writing, literature and languageArena rating | 1,402 | 1,480 |
| Vectara Hallucination Leaderboardreported | Answer rate% of documents | 99.0% | 99.4% |
| Vectara Hallucination Leaderboardreported | Hallucination rate% of summaries | 7.8% | 10.4% |
| Vending-Bench 2reported | Money after a yearUS dollars | $548.84 | $911.21 |
Bold green marks the better value on that metric. Where a source reports ranges that overlap, the difference may not be meaningful; see the benchmark page for ranges.