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OpenAI o4-mini vs Gemini 2.5 Pro (I/O Edition)

Compare OpenAI o4-mini by OpenAI against Gemini 2.5 Pro (I/O Edition) by Google AI, tested across 33 shared challenges. Updated March 2026.

Which is better, OpenAI o4-mini or Gemini 2.5 Pro (I/O Edition)?

OpenAI o4-mini and Gemini 2.5 Pro (I/O Edition) are both competitive models. OpenAI o4-mini costs $1.1/M input tokens vs $1.25/M for Gemini 2.5 Pro (I/O Edition). Compare their real outputs side by side below.

Key Differences Between OpenAI o4-mini and Gemini 2.5 Pro (I/O Edition)

OpenAI o4-mini is made by openai while Gemini 2.5 Pro (I/O Edition) is from google. On pricing, OpenAI o4-mini costs $1.1/M input tokens vs $1.25/M for Gemini 2.5 Pro (I/O Edition).

Our Verdict
Gemini 2.5 Pro (I/O Edition)
Gemini 2.5 Pro (I/O Edition)
OpenAI o4-mini
OpenAI o4-miniRunner-up

No community votes yet. On paper, Gemini 2.5 Pro (I/O Edition) has the edge — bigger model tier.

Too close to call
FAQ
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