Question 1

What is the difference between GPT-4o (Omni) and Claude Opus 4?

Accepted Answer

GPT-4o (Omni) is developed by OpenAI while Claude Opus 4 is developed by Anthropic. GPT-4o (Omni) has a 128K token context window vs Claude Opus 4's 200K. in 1 community votes on RIVAL, GPT-4o (Omni) wins 100% of head-to-head matchups. These results are based on blind head-to-head voting across 33 challenges.

Question 2

Which is better, GPT-4o (Omni) or Claude Opus 4?

Accepted Answer

Based on 1 community votes on RIVAL, GPT-4o (Omni) wins 100% of head-to-head matchups against Claude Opus 4.

Question 3

How much does GPT-4o (Omni) cost compared to Claude Opus 4?

Accepted Answer

GPT-4o (Omni) costs $2.5/M input tokens and Claude Opus 4 costs $15/M input tokens. GPT-4o (Omni) is $12.50/M cheaper per input. GPT-4o (Omni) also wins more often in community votes, making it the better value.

Question 4

How are GPT-4o (Omni) 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 33 challenges. All vote data is part of RIVAL's open dataset.