Claude 3 Haiku vs GPT-4.5
Compare Claude 3 Haiku by Anthropic against GPT-4.5 by OpenAI, context windows of 200K vs 128K, tested across 24 shared challenges.
Our Verdict
GPT-4.5
Claude 3 HaikuRunner-up
No community votes yet. On paper, GPT-4.5 has the edge — bigger model tier, newer.
Claude 3 Haiku is 120x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Claude 3 Haiku
Input
$0.25
300× cheaper
Output
$1.25
120× cheaper
GPT-4.5
Input
$75.00
Output
$150.00
Claude 3 Haiku is cheaper on both — 300× input, 120× output
Writing DNA
Style Comparison
Similarity
54%
GPT-4.5 uses 129.6x more headings
Claude 3 Haiku
GPT-4.5
50%Vocabulary63%
22wSentence Length16w
0.71Hedging0.57
0.3Bold4.7
5.9Lists6.4
0.00Emoji0.00
0.00Headings1.30
0.08Transitions0.54
Based on 13 + 11 text responses
Research
What we learned reading every model
FAQ
