GPT-5.3 Chat vs Mistral Small 4
Compare GPT-5.3 Chat by OpenAI against Mistral Small 4 by Mistral AI, context windows of 128K vs 262K, tested across 53 shared challenges.
Our Verdict
GPT-5.3 Chat
Mistral Small 4Runner-up
No community votes yet. On paper, GPT-5.3 Chat has the edge — bigger model tier, major provider backing.
Mistral Small 4 is 23x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
GPT-5.3 Chat
Input
$1.75
Output
$14.00
Mistral Small 4
Input
$0.15
12× cheaper
Output
$0.60
23× cheaper
Mistral Small 4 is cheaper on both — 12× input, 23× output
Writing DNA
Style Comparison
Similarity
50%
Mistral Small 4 uses 19.0x more emoji
GPT-5.3 Chat
Mistral Small 4
59%Vocabulary50%
26wSentence Length18w
0.84Hedging0.58
1.7Bold9.0
6.6Lists5.6
0.00Emoji0.19
0.00Headings1.10
0.25Transitions0.12
Based on 23 + 23 text responses
Research
What we learned reading every model
FAQ
