Gemini 3 Flash Preview vs o3 Mini
Compare Gemini 3 Flash Preview by Google AI against o3 Mini by OpenAI, context windows of 1.0M vs 64K, tested across 54 shared challenges. Updated April 2026.
Which is better, Gemini 3 Flash Preview or o3 Mini?
Gemini 3 Flash Preview and o3 Mini are both competitive models. Gemini 3 Flash Preview costs $0.5/M input tokens vs $1.1/M for o3 Mini. Context windows: 1049K vs 64K tokens. Compare their real outputs side by side below.
Key Differences Between Gemini 3 Flash Preview and o3 Mini
Gemini 3 Flash Preview is made by google while o3 Mini is from openai. Gemini 3 Flash Preview has a 1049K token context window compared to o3 Mini's 64K. On pricing, Gemini 3 Flash Preview costs $0.5/M input tokens vs $1.1/M for o3 Mini.
No community votes yet. On paper, Gemini 3 Flash Preview has the edge — bigger model tier, newer, bigger context window.
Style Comparison
o3 Mini uses 5.1x more transitions
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