Claude 3 Haiku
Nothing here. The model returned empty. We stared at it for a while.
Claude 3 Haiku vs GPT-5 Pro
Compare Claude 3 Haiku by Anthropic against GPT-5 Pro by OpenAI, context windows of 200K vs 400K, tested across 41 shared challenges. Updated April 2026.
Which is better, Claude 3 Haiku or GPT-5 Pro?
Claude 3 Haiku and GPT-5 Pro are both competitive models. Claude 3 Haiku costs $0.25/M input tokens vs $15/M for GPT-5 Pro. Context windows: 200K vs 400K tokens. Compare their real outputs side by side below.
Key Differences Between Claude 3 Haiku and GPT-5 Pro
Claude 3 Haiku is made by anthropic while GPT-5 Pro is from openai. Claude 3 Haiku has a 200K token context window compared to GPT-5 Pro's 400K. On pricing, Claude 3 Haiku costs $0.25/M input tokens vs $15/M for GPT-5 Pro.
Our Verdict
GPT-5 Pro
Claude 3 HaikuRunner-up
No community votes yet. On paper, GPT-5 Pro has the edge — bigger model tier, newer, bigger context window.
Claude 3 Haiku is 96x cheaper per token — worth considering if cost matters.
Slight edge
Writing DNA
Style Comparison
Similarity
96%
Claude 3 Haiku uses 34.3x more bold
Claude 3 Haiku
GPT-5 Pro
50%Vocabulary65%
22wSentence Length15w
0.71Hedging0.32
0.3Bold0.0
5.9Lists2.9
0.00Emoji0.00
0.00Headings0.00
0.08Transitions0.01
Based on 13 + 11 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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