Compare / Gemini 3 Flash Preview vs gemini-3-pro-preview

Gemini 3 Flash Preview vs gemini-3-pro-preview

6 results from 3 sources that measured both models. Each row is in the source's own units; there is no overall winner.

Gemini 3 Flash Preview
Google · profile
gemini-3-pro-preview
Google · profile
Results compared
6
Shared sources
3
BenchmarkMetricGemini 3 Flash Previewgemini-3-pro-preview
UGI LeaderboardreportedRequested-length error% off the requested word count 16.0%33.0%
UGI LeaderboardreportedStyle adherencescore from 0 to 1 0.370.37
UGI LeaderboardreportedWriting scorescore out of 100 67.766.7
Vectara Hallucination LeaderboardreportedAnswer rate% of documents 99.8%99.4%
Vectara Hallucination LeaderboardreportedHallucination rate% of summaries 13.5%13.6%
Vending-Bench 2reportedMoney after a yearUS dollars $3,634.72$5,478.16

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.