Question 1

What is the difference between Gemini 2.5 Flash Preview (thinking) and Claude Opus 4?

Accepted Answer

Gemini 2.5 Flash Preview (thinking) is developed by Google AI while Claude Opus 4 is developed by Anthropic. Gemini 2.5 Flash Preview (thinking) has a 1.0M token context window vs Claude Opus 4's 200K. in 1 community votes on RIVAL, Gemini 2.5 Flash Preview (thinking) wins 100% of head-to-head matchups. These results are based on blind head-to-head voting across 14 challenges.

Question 2

Which is better, Gemini 2.5 Flash Preview (thinking) or Claude Opus 4?

Accepted Answer

Based on 1 community votes on RIVAL, Gemini 2.5 Flash Preview (thinking) wins 100% of head-to-head matchups against Claude Opus 4.

Question 3

How much does Gemini 2.5 Flash Preview (thinking) cost compared to Claude Opus 4?

Accepted Answer

Gemini 2.5 Flash Preview (thinking) costs $0.175/M input tokens and Claude Opus 4 costs $15/M input tokens. Gemini 2.5 Flash Preview (thinking) is $14.82/M cheaper per input. Gemini 2.5 Flash Preview (thinking) also wins more often in community votes, making it the better value.

Question 4

How are Gemini 2.5 Flash Preview (thinking) 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. 1 votes have been collected for this pair across 14 challenges. All vote data is part of RIVAL's open dataset.