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

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

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

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

GPT-5.1 costs $1.25/M input tokens and Grok 3 Mini Beta costs $0.4/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 GPT-5.1 and Grok 3 Mini Beta on Rival?

This page shows a side-by-side comparison of GPT-5.1 and Grok 3 Mini Beta across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

Updated Nov 2025

GPT-5.1vsGrok 3 Mini Beta

Grok 3 Mini Beta is cheaper than GPT-5.1 at $0.4/M vs $1.25/M input tokens.

GPT-5.1 and Grok 3 Mini Beta compared across 13 shared prompts
Spec	GPT-5.1	Grok 3 Mini Beta
Input price	$1.25/M tokens	$0.4/M tokens
Output price	$10/M tokens	$0.8/M tokens
Context window	400K tokens	131K tokens
Weights	Closed	—
Free API (OpenRouter)	No	No
Released	Nov 2025	Apr 2025