Gemini 2.5 Flash Preview vs OpenAI o3
Compare Gemini 2.5 Flash Preview by Google AI against OpenAI o3 by OpenAI, tested across 27 shared challenges. Updated June 2026.
Which is better, Gemini 2.5 Flash Preview or OpenAI o3?
Gemini 2.5 Flash Preview and OpenAI o3 are both competitive models. Gemini 2.5 Flash Preview costs $0.15/M input tokens vs $10/M for OpenAI o3. Compare their real outputs side by side below.
Key Differences Between Gemini 2.5 Flash Preview and OpenAI o3
Gemini 2.5 Flash Preview is made by google while OpenAI o3 is from openai. On pricing, Gemini 2.5 Flash Preview costs $0.15/M input tokens vs $10/M for OpenAI o3.
Per 1M tokens
Gemini 2.5 Flash Preview is cheaper on both — 67× input, 67× output
No community votes yet. On paper, OpenAI o3 has the edge — bigger model tier.
Gemini 2.5 Flash Preview is 67x cheaper per token — worth considering if cost matters.
Style Comparison
Gemini 2.5 Flash Preview uses 5.9x more bold
