What is the difference between Gemini 2.5 Pro (I/O Edition) and OpenAI o3?

Gemini 2.5 Pro (I/O Edition) is developed by Google AI while OpenAI o3 is developed by OpenAI. in 38 community votes on Rival, Gemini 2.5 Pro (I/O Edition) wins 73% of head-to-head matchups. These results are based on blind head-to-head voting across 41 challenges.

Which is better, Gemini 2.5 Pro (I/O Edition) or OpenAI o3?

Based on 38 community votes on Rival, Gemini 2.5 Pro (I/O Edition) wins 73% of head-to-head matchups against OpenAI o3. Gemini 2.5 Pro (I/O Edition) is strongest in Web Design, Reasoning, Image Generation.

How much does Gemini 2.5 Pro (I/O Edition) cost compared to OpenAI o3?

Gemini 2.5 Pro (I/O Edition) costs $1.25/M input tokens and OpenAI o3 costs $10/M input tokens. Gemini 2.5 Pro (I/O Edition) is $8.75/M cheaper per input. Gemini 2.5 Pro (I/O Edition) also wins more often in community votes, making it the better value.

How are Gemini 2.5 Pro (I/O Edition) vs OpenAI o3 votes collected on Rival?

Rival presents both models' outputs side-by-side in blind duels. Voters see the responses but don't know which model produced each one, eliminating brand bias. 38 votes have been collected for this pair across 41 challenges. All vote data is part of Rival's open dataset.

Updated May 2025

Gemini 2.5 Pro (I/O Edition)vsOpenAI o3

Gemini 2.5 Pro (I/O Edition) wins 73% of 38 blind community votes against OpenAI o3 on Rival.

Gemini 2.5 Pro (I/O Edition) and OpenAI o3 compared across 41 shared prompts
Spec	Gemini 2.5 Pro (I/O Edition)	OpenAI o3
Win rate	73%	27%
Input price	$1.25/M tokens	$10/M tokens
Output price	$10/M tokens	$40/M tokens
Parameters	Not disclosed	Not disclosed
Weights	Closed	Closed
Free API (OpenRouter)	No	No
Released	May 2025	Apr 2025