Mistral Nemo vs Claude Opus 4

Compare Mistral Nemo by Mistral AI against Claude Opus 4 by Anthropic, context windows of 128K vs 200K, tested across 18 shared challenges. Updated April 2026.

Which is better, Mistral Nemo or Claude Opus 4?

Mistral Nemo and Claude Opus 4 are both competitive models. Mistral Nemo costs $0.03/M input tokens vs $15/M for Claude Opus 4. Context windows: 128K vs 200K tokens. Compare their real outputs side by side below.

Key Differences Between Mistral Nemo and Claude Opus 4

Mistral Nemo is made by mistral while Claude Opus 4 is from anthropic. Mistral Nemo has a 128K token context window compared to Claude Opus 4's 200K. On pricing, Mistral Nemo costs $0.03/M input tokens vs $15/M for Claude Opus 4.

Our Verdict
Claude Opus 4
Claude Opus 4
Mistral Nemo
Mistral NemoRunner-up

No community votes yet. On paper, Claude Opus 4 has the edge — bigger model tier, newer, bigger context window, major provider backing.

Mistral Nemo is 1071x cheaper per token — worth considering if cost matters.

Slight edge
Writing DNA

Style Comparison

Similarity
85%

Claude Opus 4 uses 11.2x more emoji

Mistral Nemo
Claude Opus 4
46%Vocabulary64%
19wSentence Length62w
1.08Hedging0.52
3.6Bold4.4
8.0Lists9.1
0.00Emoji0.11
0.00Headings1.87
0.17Transitions0.27
Based on 10 + 16 text responses
vs

Ask them anything yourself

Mistral NemoClaude Opus 4

Some models write identically. You are paying for the brand.

178 models fingerprinted across 32 writing dimensions. Free research.

Model Similarity Index

185x

price gap between models that write identically

178

models

12

clone pairs

32

dimensions

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95.7%
Qwen3 Coder / Flash
95.6%
GPT-5.4 / Mini
93.3%

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026
Free preview13 of 58 slides
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