GPT-5.1-Codex vs Mistral Nemo
Compare GPT-5.1-Codex by OpenAI against Mistral Nemo by Mistral AI, context windows of 400K vs 128K, tested across 52 shared challenges. Updated April 2026.
Which is better, GPT-5.1-Codex or Mistral Nemo?
GPT-5.1-Codex and Mistral Nemo are both competitive models. GPT-5.1-Codex costs $1.25/M input tokens vs $0.03/M for Mistral Nemo. Context windows: 400K vs 128K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-5.1-Codex and Mistral Nemo
GPT-5.1-Codex is made by openai while Mistral Nemo is from mistral. GPT-5.1-Codex has a 400K token context window compared to Mistral Nemo's 128K. On pricing, GPT-5.1-Codex costs $1.25/M input tokens vs $0.03/M for Mistral Nemo.
No community votes yet. On paper, GPT-5.1-Codex has the edge — bigger model tier, newer, bigger context window, major provider backing.
Mistral Nemo is 143x cheaper per token — worth considering if cost matters.
Style Comparison
GPT-5.1-Codex uses 50.1x more headings
vsAsk them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
