Question 1

What is the difference between Claude Opus 4 and Gemini 2.5 Pro Preview 06-05?

Accepted Answer

Claude Opus 4 is developed by Anthropic while Gemini 2.5 Pro Preview 06-05 is developed by Google AI. Claude Opus 4 has a 200K token context window vs Gemini 2.5 Pro Preview 06-05's 1.0M. in 93 community votes on RIVAL, Gemini 2.5 Pro Preview 06-05 wins 53% of head-to-head matchups. These results are based on blind head-to-head voting across 29 challenges.

Question 2

Which is better, Claude Opus 4 or Gemini 2.5 Pro Preview 06-05?

Accepted Answer

Based on 93 community votes on RIVAL, Gemini 2.5 Pro Preview 06-05 wins 53% of head-to-head matchups against Claude Opus 4. Gemini 2.5 Pro Preview 06-05 is strongest in Image Generation, Analysis, Conversation. However, Claude Opus 4 leads in Web Design.

Question 3

How much does Claude Opus 4 cost compared to Gemini 2.5 Pro Preview 06-05?

Accepted Answer

Claude Opus 4 costs $15/M input tokens and Gemini 2.5 Pro Preview 06-05 costs $1.25/M input tokens. Gemini 2.5 Pro Preview 06-05 is $13.75/M cheaper per input. Gemini 2.5 Pro Preview 06-05 also wins more often in community votes, making it the better value.

Question 4

How are Claude Opus 4 vs Gemini 2.5 Pro Preview 06-05 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. 93 votes have been collected for this pair across 29 challenges. All vote data is part of RIVAL's open dataset.