What is the difference between GPT OSS 20B and Mistral Medium 3?

GPT OSS 20B is developed by OpenAI while Mistral Medium 3 is developed by Mistral AI. GPT OSS 20B has a 131K token context window vs Mistral Medium 3's 131K. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, GPT OSS 20B or Mistral Medium 3?

It depends on your use case. GPT OSS 20B and Mistral Medium 3 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 54 challenges so you can judge which fits your needs best.

How much does GPT OSS 20B cost compared to Mistral Medium 3?

GPT OSS 20B costs $0.02/M input tokens and Mistral Medium 3 costs $0.4/M input tokens. GPT OSS 20B is $0.38/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 20B and Mistral Medium 3 on Rival?

This page shows a side-by-side comparison of GPT OSS 20B and Mistral Medium 3 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 20BvsMistral Medium 3

GPT OSS 20B is cheaper than Mistral Medium 3 at $0.02/M vs $0.4/M input tokens.

GPT OSS 20B and Mistral Medium 3 compared across 54 shared prompts
Spec	GPT OSS 20B	Mistral Medium 3
Input price	$0.02/M tokens	$0.4/M tokens
Output price	$0.1/M tokens	$2/M tokens
Context window	131K tokens	131K tokens
Parameters	21B (3.6B active)	Not disclosed
Weights	Open	—
Free API (OpenRouter)	No	No
Released	Aug 2025	May 2025