Question 1

What is the difference between Gemini 2.5 Pro Experimental and Claude Opus 4?

Accepted Answer

Gemini 2.5 Pro Experimental is developed by Google AI while Claude Opus 4 is developed by Anthropic. Gemini 2.5 Pro Experimental has a 1.0M token context window vs Claude Opus 4's 200K. in 117 community votes on RIVAL, Claude Opus 4 wins 54% of head-to-head matchups. These results are based on blind head-to-head voting across 28 challenges.

Question 2

Which is better, Gemini 2.5 Pro Experimental or Claude Opus 4?

Accepted Answer

Based on 117 community votes on RIVAL, Claude Opus 4 wins 54% of head-to-head matchups against Gemini 2.5 Pro Experimental. Claude Opus 4 is strongest in Conversation.

Question 3

How much does Gemini 2.5 Pro Experimental cost compared to Claude Opus 4?

Accepted Answer

Gemini 2.5 Pro Experimental costs $1/M input tokens and Claude Opus 4 costs $15/M input tokens. Gemini 2.5 Pro Experimental is $14.00/M cheaper per input. The more expensive model wins 54% of duels, so the premium may be justified by quality.

Question 4

How are Gemini 2.5 Pro Experimental vs Claude Opus 4 votes collected on RIVAL?

Accepted Answer

RIVAL presents both models' outputs side-by-side in blind duels — voters see the responses but don't know which model produced each one. This eliminates brand bias. 117 votes have been collected for this pair across 28 challenges. All vote data is part of RIVAL's open dataset.