What is the difference between GPT-5 Codex and Grok 3 Mini Beta?

GPT-5 Codex is developed by OpenAI while Grok 3 Mini Beta is developed by xAI. You can compare their actual outputs across 13 challenges on RIVAL to see how they differ in practice.

Which is better, GPT-5 Codex or Grok 3 Mini Beta?

It depends on your use case. GPT-5 Codex and Grok 3 Mini Beta each have strengths in different areas. RIVAL lets you compare their real outputs side-by-side across 13 challenges so you can judge which fits your needs best.

How can I compare GPT-5 Codex and Grok 3 Mini Beta on RIVAL?

This page shows a side-by-side comparison of GPT-5 Codex and Grok 3 Mini Beta across shared challenges. You can vote on which model produced the better output, and Pro users can create custom challenges to test both models with their own prompts.