Question 1

What is the difference between Gemini 2.5 Flash Preview 05-20 and Gemini 2.5 Pro Preview 06-05?

Accepted Answer

Both are developed by Google AI but target different use cases. Gemini 2.5 Flash Preview 05-20 has a 1.0M token context window vs Gemini 2.5 Pro Preview 06-05's 1.0M. in 1 community votes on RIVAL, Gemini 2.5 Flash Preview 05-20 wins 100% of head-to-head matchups. These results are based on blind head-to-head voting across 11 challenges.

Question 2

Which is better, Gemini 2.5 Flash Preview 05-20 or Gemini 2.5 Pro Preview 06-05?

Accepted Answer

Based on 1 community votes on RIVAL, Gemini 2.5 Flash Preview 05-20 wins 100% of head-to-head matchups against Gemini 2.5 Pro Preview 06-05.

Question 3

How much does Gemini 2.5 Flash Preview 05-20 cost compared to Gemini 2.5 Pro Preview 06-05?

Accepted Answer

Gemini 2.5 Flash Preview 05-20 costs $0.15/M input tokens and Gemini 2.5 Pro Preview 06-05 costs $1.25/M input tokens. Gemini 2.5 Flash Preview 05-20 is $1.10/M cheaper per input. Gemini 2.5 Flash Preview 05-20 also wins more often in community votes, making it the better value.

Question 4

How are Gemini 2.5 Flash Preview 05-20 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. 1 votes have been collected for this pair across 11 challenges. All vote data is part of RIVAL's open dataset.