What is the difference between Grok 3 Mini Beta and GPT-5.1-Codex?

Grok 3 Mini Beta is developed by xAI while GPT-5.1-Codex is developed by OpenAI. Grok 3 Mini Beta has a 131K token context window vs GPT-5.1-Codex's 400K. You can compare their actual outputs across 13 challenges on Rival to see how they differ in practice.

Which is better, Grok 3 Mini Beta or GPT-5.1-Codex?

It depends on your use case. Grok 3 Mini Beta and GPT-5.1-Codex 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 much does Grok 3 Mini Beta cost compared to GPT-5.1-Codex?

Grok 3 Mini Beta costs $0.4/M input tokens and GPT-5.1-Codex costs $1.25/M input tokens. Grok 3 Mini Beta is $0.85/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare Grok 3 Mini Beta and GPT-5.1-Codex on Rival?

This page shows a side-by-side comparison of Grok 3 Mini Beta and GPT-5.1-Codex 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.