GPT-4.5 vs Mistral Medium 3

Compare GPT-4.5 by OpenAI against Mistral Medium 3 by Mistral AI, in 2 community votes, gpt-4.5 wins 100% of head-to-head duels, context windows of 128K vs 131K, tested across 14 shared challenges. Updated March 2026.

Which is better, GPT-4.5 or Mistral Medium 3?

GPT-4.5 is the better choice overall, winning 100% of 2 blind community votes on Rival. GPT-4.5 costs $75/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-4.5 and Mistral Medium 3

GPT-4.5 is made by openai while Mistral Medium 3 is from mistral. GPT-4.5 has a 128K token context window compared to Mistral Medium 3's 131K. On pricing, GPT-4.5 costs $75/M input tokens vs $0.4/M for Mistral Medium 3. In community voting, In 2 community votes, GPT-4.5 wins 100% of head-to-head duels.

In 2 community votes, GPT-4.5 wins 100% of head-to-head duels. Based on blind community voting from the Rival open dataset of 2+ human preference judgments for this pair.

Our Verdict
GPT-4.5
GPT-4.5Winner
Mistral Medium 3
Mistral Medium 3Runner-up

Pick GPT-4.5. In 2 blind votes, GPT-4.5 wins 100% of the time. That's not luck.

Mistral Medium 3 is 75x cheaper per token — worth considering if cost matters.

Clear winner
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