Claude Sonnet 4.5
Nothing here. The model returned empty. We stared at it for a while.
Claude Sonnet 4.5 vs o3 Mini
Compare Claude Sonnet 4.5 by Anthropic against o3 Mini by OpenAI, context windows of 200K vs 64K, tested across 43 shared challenges. Updated April 2026.
Which is better, Claude Sonnet 4.5 or o3 Mini?
Claude Sonnet 4.5 and o3 Mini are both competitive models. Claude Sonnet 4.5 costs $3/M input tokens vs $1.1/M for o3 Mini. Context windows: 200K vs 64K tokens. Compare their real outputs side by side below.
Key Differences Between Claude Sonnet 4.5 and o3 Mini
Claude Sonnet 4.5 is made by anthropic while o3 Mini is from openai. Claude Sonnet 4.5 has a 200K token context window compared to o3 Mini's 64K. On pricing, Claude Sonnet 4.5 costs $3/M input tokens vs $1.1/M for o3 Mini.
Our Verdict
Claude Sonnet 4.5
o3 MiniRunner-up
No community votes yet. On paper, Claude Sonnet 4.5 has the edge — bigger model tier, newer, bigger context window.
o3 Mini is 3.4x cheaper per token — worth considering if cost matters.
Slight edge
Writing DNA
Style Comparison
Similarity
87%
Claude Sonnet 4.5 uses 45.2x more emoji
Claude Sonnet 4.5
o3 Mini
64%Vocabulary65%
94wSentence Length17w
0.48Hedging0.74
4.9Bold3.9
8.0Lists1.7
0.45Emoji0.00
1.91Headings0.47
0.07Transitions0.38
Based on 20 + 12 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.
Free preview13 of 58 slides
FAQ