Question 1

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

Accepted Answer

GPT-5 Mini is developed by OpenAI while Claude Sonnet 4 is developed by Anthropic. in 28 community votes on RIVAL, Claude Sonnet 4 wins 81% of head-to-head matchups. These results are based on blind head-to-head voting across 31 challenges.

Question 2

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

Accepted Answer

Based on 28 community votes on RIVAL, Claude Sonnet 4 wins 81% of head-to-head matchups against GPT-5 Mini. Claude Sonnet 4 is strongest in Web Design, Image Generation. However, GPT-5 Mini leads in Reasoning.

Question 3

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

Accepted Answer

GPT-5 Mini costs $0.25/M input tokens and Claude Sonnet 4 costs $3/M input tokens. GPT-5 Mini is $2.75/M cheaper per input. The more expensive model wins 81% of duels, so the premium may be justified by quality.

Question 4

How are GPT-5 Mini vs Claude Sonnet 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. 28 votes have been collected for this pair across 31 challenges. All vote data is part of RIVAL's open dataset.