Claude 3 Haiku vs GPT-5.5
Compare Claude 3 Haiku by Anthropic against GPT-5.5 by OpenAI, context windows of 200K vs 1.1M, tested across 54 shared challenges.
Our Verdict
GPT-5.5
Claude 3 HaikuRunner-up
No community votes yet. On paper, GPT-5.5 has the edge — bigger model tier, newer, bigger context window.
Claude 3 Haiku is 24x cheaper per token — worth considering if cost matters.
Slight edge
API pricing
Cost per 1M tokens
Claude 3 Haiku
Input
$0.25
20× cheaper
Output
$1.25
24× cheaper
GPT-5.5
Input
$5.00
Output
$30.00
Claude 3 Haiku is cheaper on both — 20× input, 24× output
Writing DNA
Style Comparison
Similarity
54%
GPT-5.5 uses 167.8x more headings
Claude 3 Haiku
GPT-5.5
50%Vocabulary58%
22wSentence Length18w
0.71Hedging0.74
0.3Bold2.9
5.9Lists5.1
0.00Emoji0.00
0.00Headings1.68
0.08Transitions0.03
Based on 13 + 26 text responses
Research
What we learned reading every model
FAQ
