Claude 3 Haiku
Nothing here. The model returned empty. We stared at it for a while.
Claude 3 Haiku vs OpenAI o3
Compare Claude 3 Haiku by Anthropic against OpenAI o3 by OpenAI, tested across 53 shared challenges. Updated April 2026.
Which is better, Claude 3 Haiku or OpenAI o3?
Claude 3 Haiku and OpenAI o3 are both competitive models. Claude 3 Haiku costs $0.25/M input tokens vs $10/M for OpenAI o3. Compare their real outputs side by side below.
Key Differences Between Claude 3 Haiku and OpenAI o3
Claude 3 Haiku is made by anthropic while OpenAI o3 is from openai. On pricing, Claude 3 Haiku costs $0.25/M input tokens vs $10/M for OpenAI o3.
Our Verdict
OpenAI o3
Claude 3 HaikuRunner-up
No community votes yet. On paper, OpenAI o3 has the edge — bigger model tier, newer.
Claude 3 Haiku is 32x cheaper per token — worth considering if cost matters.
Too close to call
Writing DNA
Style Comparison
Similarity
97%
OpenAI o3 uses 37.9x more headings
Claude 3 Haiku
OpenAI o3
50%Vocabulary68%
22wSentence Length14w
0.71Hedging0.26
0.3Bold0.7
5.9Lists3.0
0.00Emoji0.00
0.00Headings0.38
0.08Transitions0.12
Based on 13 + 16 text responses
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279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
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