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

Both are developed by Google AI but target different use cases. in 98 community votes on Rival, Gemini 2.5 Pro (I/O Edition) wins 55% of head-to-head matchups. These results are based on blind head-to-head voting across 36 challenges.

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

Gemini 2.5 Pro Experimental costs $1/M input tokens and Gemini 2.5 Pro (I/O Edition) costs $1.25/M input tokens. Gemini 2.5 Pro Experimental is $0.25/M cheaper per input. The more expensive model wins 55% of duels, so the premium may be justified by quality.

How are Gemini 2.5 Pro Experimental vs Gemini 2.5 Pro (I/O Edition) 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. 98 votes have been collected for this pair across 36 challenges. All vote data is part of Rival's open dataset.

Updated May 2025

Gemini 2.5 Pro ExperimentalvsGemini 2.5 Pro (I/O Edition)

Gemini 2.5 Pro (I/O Edition) wins 55% of 98 blind community votes against Gemini 2.5 Pro Experimental on Rival.

Gemini 2.5 Pro Experimental and Gemini 2.5 Pro (I/O Edition) compared across 36 shared prompts
Spec	Gemini 2.5 Pro Experimental	Gemini 2.5 Pro (I/O Edition)
Win rate	45%	55%
Input price	$1/M tokens	$1.25/M tokens
Output price	$2/M tokens	$10/M tokens
Context window	1.0M tokens	—
Parameters	Not disclosed	Not disclosed
Weights	Closed	Closed
Free API (OpenRouter)	No	No
Released	Mar 2025	May 2025

Our Verdict

Gemini 2.5 Pro (I/O Edition)Winner

Gemini 2.5 Pro ExperimentalRunner-up

Gemini 2.5 Pro (I/O Edition) has the edge overall. In 98 blind votes, Gemini 2.5 Pro (I/O Edition) wins 55% of the time.

Pick Gemini 2.5 Pro Experimental for Reasoning. Pick Gemini 2.5 Pro (I/O Edition) for Image Generation, Conversation. Gemini 2.5 Pro Experimental costs 5.0x less per token.

Slight edge

Reviewing agent-written code?See a Brief PR report

API pricing