What is the difference between Claude Sonnet 4.5 and Mistral Medium 3.1?

Claude Sonnet 4.5 is developed by Anthropic while Mistral Medium 3.1 is developed by Mistral AI. Claude Sonnet 4.5 has a 200K token context window vs Mistral Medium 3.1's 131K. You can compare their actual outputs across 43 challenges on Rival to see how they differ in practice.

Which is better, Claude Sonnet 4.5 or Mistral Medium 3.1?

It depends on your use case. Claude Sonnet 4.5 and Mistral Medium 3.1 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 43 challenges so you can judge which fits your needs best.

How much does Claude Sonnet 4.5 cost compared to Mistral Medium 3.1?

Claude Sonnet 4.5 costs $3/M input tokens and Mistral Medium 3.1 costs $0.4/M input tokens. Mistral Medium 3.1 is $2.60/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 Claude Sonnet 4.5 and Mistral Medium 3.1 on Rival?

This page shows a side-by-side comparison of Claude Sonnet 4.5 and Mistral Medium 3.1 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 Sep 2025

Claude Sonnet 4.5vsMistral Medium 3.1

Mistral Medium 3.1 is cheaper than Claude Sonnet 4.5 at $0.4/M vs $3/M input tokens.

Claude Sonnet 4.5 and Mistral Medium 3.1 compared across 43 shared prompts
Spec	Claude Sonnet 4.5	Mistral Medium 3.1
Input price	$3/M tokens	$0.4/M tokens
Output price	$15/M tokens	$2/M tokens
Context window	200K tokens	131K tokens
Weights	Closed	—
Free API (OpenRouter)	No	No
Released	Sep 2025	Aug 2025