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Mistral Small 4 vs Claude Opus 4.1

Compare Mistral Small 4 by Mistral AI against Claude Opus 4.1 by Anthropic, context windows of 262K vs 200K, tested across 27 shared challenges. Updated March 2026.

Which is better, Mistral Small 4 or Claude Opus 4.1?

Mistral Small 4 and Claude Opus 4.1 are both competitive models. Mistral Small 4 costs $0.15/M input tokens vs $15/M for Claude Opus 4.1. Context windows: 262K vs 200K tokens. Compare their real outputs side by side below.

Key Differences Between Mistral Small 4 and Claude Opus 4.1

Mistral Small 4 is made by mistral while Claude Opus 4.1 is from anthropic. Mistral Small 4 has a 262K token context window compared to Claude Opus 4.1's 200K. On pricing, Mistral Small 4 costs $0.15/M input tokens vs $15/M for Claude Opus 4.1.

Our Verdict
Claude Opus 4.1
Claude Opus 4.1
Mistral Small 4
Mistral Small 4Runner-up

No community votes yet. On paper, Claude Opus 4.1 has the edge — bigger model tier, major provider backing.

Mistral Small 4 is 125x cheaper per token — worth considering if cost matters.

Too close to call
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