What is the difference between GPT OSS 120B and Grok 3 Mini Beta?

GPT OSS 120B is developed by OpenAI while Grok 3 Mini Beta is developed by xAI. GPT OSS 120B has a 131K 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 OSS 120B or Grok 3 Mini Beta?

It depends on your use case. GPT OSS 120B 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 OSS 120B cost compared to Grok 3 Mini Beta?

GPT OSS 120B costs $0.18/M input tokens and Grok 3 Mini Beta costs $0.4/M input tokens. GPT OSS 120B is $0.22/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 OSS 120B and Grok 3 Mini Beta on Rival?

This page shows a side-by-side comparison of GPT OSS 120B 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 Aug 2025

GPT OSS 120BvsGrok 3 Mini Beta

GPT OSS 120B is cheaper than Grok 3 Mini Beta at $0.18/M vs $0.4/M input tokens.

GPT OSS 120B and Grok 3 Mini Beta compared across 13 shared prompts
Spec	GPT OSS 120B	Grok 3 Mini Beta
Input price	$0.18/M tokens	$0.4/M tokens
Output price	$0.8/M tokens	$0.8/M tokens
Context window	131K tokens	131K tokens
Parameters	117B (5.1B active)	Not disclosed
Weights	Open	—
Free API (OpenRouter)	No	No
Released	Aug 2025	Apr 2025