Gemini 2.5 Flash Preview vs OpenAI o4-mini
Compare Gemini 2.5 Flash Preview by Google AI against OpenAI o4-mini by OpenAI, tested across 27 shared challenges. Updated June 2026.
Which is better, Gemini 2.5 Flash Preview or OpenAI o4-mini?
Gemini 2.5 Flash Preview and OpenAI o4-mini are both competitive models. Gemini 2.5 Flash Preview costs $0.15/M input tokens vs $1.1/M for OpenAI o4-mini. Compare their real outputs side by side below.
Key Differences Between Gemini 2.5 Flash Preview and OpenAI o4-mini
Gemini 2.5 Flash Preview is made by google while OpenAI o4-mini is from openai. On pricing, Gemini 2.5 Flash Preview costs $0.15/M input tokens vs $1.1/M for OpenAI o4-mini.
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Gemini 2.5 Flash Preview is 7.3x cheaper per token — worth considering if cost matters.
Cost per 1M tokens
Gemini 2.5 Flash Preview is cheaper on both — 7.3× input, 7.3× output
Style Comparison
Gemini 2.5 Flash Preview uses 407.5x more bold
