Question 1

What is the difference between GPT-5 Mini and Claude Opus 4?

Accepted Answer

GPT-5 Mini is developed by OpenAI while Claude Opus 4 is developed by Anthropic. in 1 community votes on RIVAL, Claude Opus 4 wins 100% of head-to-head matchups. These results are based on blind head-to-head voting across 32 challenges.

Question 2

Which is better, GPT-5 Mini or Claude Opus 4?

Accepted Answer

Based on 1 community votes on RIVAL, Claude Opus 4 wins 100% of head-to-head matchups against GPT-5 Mini.

Question 3

How much does GPT-5 Mini cost compared to Claude Opus 4?

Accepted Answer

GPT-5 Mini costs $0.25/M input tokens and Claude Opus 4 costs $15/M input tokens. GPT-5 Mini is $14.75/M cheaper per input. The more expensive model wins 100% of duels, so the premium may be justified by quality.

Question 4

How are GPT-5 Mini 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 32 challenges. All vote data is part of RIVAL's open dataset.