Claude Sonnet 4.5
Nothing here. The model returned empty. We stared at it for a while.
Claude Sonnet 4.5 vs GPT-4o mini
Compare Claude Sonnet 4.5 by Anthropic against GPT-4o mini by OpenAI, context windows of 200K vs 128K, tested across 34 shared challenges. Updated April 2026.
Which is better, Claude Sonnet 4.5 or GPT-4o mini?
Claude Sonnet 4.5 and GPT-4o mini are both competitive models. Claude Sonnet 4.5 costs $3/M input tokens vs $0.15/M for GPT-4o mini. Context windows: 200K vs 128K tokens. Compare their real outputs side by side below.
Key Differences Between Claude Sonnet 4.5 and GPT-4o mini
Claude Sonnet 4.5 is made by anthropic while GPT-4o mini is from openai. Claude Sonnet 4.5 has a 200K token context window compared to GPT-4o mini's 128K. On pricing, Claude Sonnet 4.5 costs $3/M input tokens vs $0.15/M for GPT-4o mini.
Our Verdict
Claude Sonnet 4.5
GPT-4o miniRunner-up
No community votes yet. On paper, Claude Sonnet 4.5 has the edge — bigger model tier, newer, bigger context window.
GPT-4o mini is 25x cheaper per token — worth considering if cost matters.
Slight edge
Writing DNA
Style Comparison
Similarity
94%
Claude Sonnet 4.5 uses 45.2x more emoji
Claude Sonnet 4.5
GPT-4o mini
64%Vocabulary54%
94wSentence Length18w
0.48Hedging0.84
4.9Bold3.8
8.0Lists3.3
0.45Emoji0.00
1.91Headings1.03
0.07Transitions0.23
Based on 20 + 22 text responses
vsAsk them anything yourself
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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