OpenAI: GPT-5.6 Luna vs Mistral Medium 3
Compare OpenAI: GPT-5.6 Luna by OpenAI against Mistral Medium 3 by Mistral AI, context windows of 1.1M vs 131K, tested across 54 shared challenges.
Our Verdict
OpenAI: GPT-5.6 Luna
Mistral Medium 3
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Mistral Medium 3 is 3.0x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
OpenAI: GPT-5.6 Luna
Input
$1.00
Output
$6.00
Mistral Medium 3
Input
$0.40
2.5× cheaper
Output
$2.00
3.0× cheaper
Mistral Medium 3 is cheaper on both — 2.5× input, 3.0× output
Writing DNA
Style Comparison
Similarity
55%
Mistral Medium 3 uses 6.0x more emoji
OpenAI: GPT-5.6 Luna
Mistral Medium 3
59%Vocabulary57%
19wSentence Length17w
0.84Hedging0.73
2.7Bold8.6
4.5Lists6.5
0.00Emoji0.06
1.20Headings1.18
0.10Transitions0.15
Based on 27 + 15 text responses
Research
What we learned reading every model
FAQ
