What is the difference between GPT OSS 120B and Mistral Small 4?

GPT OSS 120B is developed by OpenAI while Mistral Small 4 is developed by Mistral AI. GPT OSS 120B has a 131K token context window vs Mistral Small 4's 262K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, GPT OSS 120B or Mistral Small 4?

It depends on your use case. GPT OSS 120B and Mistral Small 4 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does GPT OSS 120B cost compared to Mistral Small 4?

GPT OSS 120B costs $0.18/M input tokens and Mistral Small 4 costs $0.15/M input tokens. Mistral Small 4 is $0.03/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 Mistral Small 4 on Rival?

This page shows a side-by-side comparison of GPT OSS 120B and Mistral Small 4 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 Mar 2026

GPT OSS 120BvsMistral Small 4

Mistral Small 4 is cheaper than GPT OSS 120B at $0.15/M vs $0.18/M input tokens.

GPT OSS 120B and Mistral Small 4 compared across 53 shared prompts
Spec	GPT OSS 120B	Mistral Small 4
Input price	$0.18/M tokens	$0.15/M tokens
Output price	$0.8/M tokens	$0.6/M tokens
Context window	131K tokens	262K tokens
Weights	Open	Open
Free API (OpenRouter)	No	No
Released	Aug 2025	Mar 2026