Claude Haiku 4.5 vs Gemini 2.5 Flash Preview 05-20 (thinking)
Compare Claude Haiku 4.5 by Anthropic against Gemini 2.5 Flash Preview 05-20 (thinking) by Google AI, context windows of 200K vs 1.0M, tested across 12 shared challenges.
Our Verdict
Claude Haiku 4.5
Gemini 2.5 Flash Preview 05-20 (thinking)Runner-up
No community votes yet. On paper, Claude Haiku 4.5 has the edge — bigger model tier, newer.
Too close to call
API pricing
Cost per 1M tokens
Claude Haiku 4.5
Input
$1.00
Output
$5.00
Gemini 2.5 Flash Preview 05-20 (thinking)
Input
$0.15
6.7× cheaper
Output
$3.50
1.4× cheaper
Gemini 2.5 Flash Preview 05-20 (thinking) is cheaper on both — 6.7× input, 1.4× output
Writing DNA
Style Comparison
Similarity
39%
Claude Haiku 4.5 uses 64.1x more hedging
Claude Haiku 4.5
Gemini 2.5 Flash Preview 05-20 (thinking)
61%Vocabulary70%
47wSentence Length11w
0.64Hedging0.00
5.1Bold4.2
6.3Lists7.3
0.20Emoji0.00
2.46Headings0.00
0.17Transitions0.00
Based on 24 + 3 text responses
Research
What we learned reading every model
FAQ
