Question 1

What is the difference between Google: Gemini 2.5 Flash Preview 09-2025 and GPT-5?

Accepted Answer

Google: Gemini 2.5 Flash Preview 09-2025 is developed by Google AI while GPT-5 is developed by OpenAI. Google: Gemini 2.5 Flash Preview 09-2025 has a 1.0M token context window vs GPT-5's 400K. in 3 community votes on RIVAL, GPT-5 wins 100% of head-to-head matchups. These results are based on blind head-to-head voting across 45 challenges.

Question 2

Which is better, Google: Gemini 2.5 Flash Preview 09-2025 or GPT-5?

Accepted Answer

Based on 3 community votes on RIVAL, GPT-5 wins 100% of head-to-head matchups against Google: Gemini 2.5 Flash Preview 09-2025.

Question 3

How much does Google: Gemini 2.5 Flash Preview 09-2025 cost compared to GPT-5?

Accepted Answer

Google: Gemini 2.5 Flash Preview 09-2025 costs $0.3/M input tokens and GPT-5 costs $1.25/M input tokens. Google: Gemini 2.5 Flash Preview 09-2025 is $0.95/M cheaper per input. The more expensive model wins 100% of duels, so the premium may be justified by quality.

Question 4

How are Google: Gemini 2.5 Flash Preview 09-2025 vs GPT-5 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. 3 votes have been collected for this pair across 45 challenges. All vote data is part of RIVAL's open dataset.