GPT-4o (Omni) vs Mistral Medium 3

Compare GPT-4o (Omni) by OpenAI against Mistral Medium 3 by Mistral AI, context windows of 128K vs 131K, tested across 26 shared challenges. Updated March 2026.

Which is better, GPT-4o (Omni) or Mistral Medium 3?

GPT-4o (Omni) and Mistral Medium 3 are both competitive models. GPT-4o (Omni) costs $2.5/M input tokens vs $0.4/M for Mistral Medium 3. Context windows: 128K vs 131K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-4o (Omni) and Mistral Medium 3

GPT-4o (Omni) is made by openai while Mistral Medium 3 is from mistral. GPT-4o (Omni) has a 128K token context window compared to Mistral Medium 3's 131K. On pricing, GPT-4o (Omni) costs $2.5/M input tokens vs $0.4/M for Mistral Medium 3.

Our Verdict
GPT-4o (Omni)
GPT-4o (Omni)
Mistral Medium 3
Mistral Medium 3Runner-up

No community votes yet. On paper, GPT-4o (Omni) has the edge — bigger model tier, major provider backing.

Mistral Medium 3 is 5.0x cheaper per token — worth considering if cost matters.

Too close to call
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