Claude Sonnet 3.6 (2022-10-22) vs OpenAI o3

Compare Claude Sonnet 3.6 (2022-10-22) by Anthropic against OpenAI o3 by OpenAI, tested across 54 shared challenges. Updated April 2026.

Which is better, Claude Sonnet 3.6 (2022-10-22) or OpenAI o3?

Claude Sonnet 3.6 (2022-10-22) and OpenAI o3 are both competitive models. Claude Sonnet 3.6 (2022-10-22) costs $3/M input tokens vs $10/M for OpenAI o3. Compare their real outputs side by side below.

Key Differences Between Claude Sonnet 3.6 (2022-10-22) and OpenAI o3

Claude Sonnet 3.6 (2022-10-22) is made by anthropic while OpenAI o3 is from openai. On pricing, Claude Sonnet 3.6 (2022-10-22) costs $3/M input tokens vs $10/M for OpenAI o3.

Our Verdict
OpenAI o3
OpenAI o3
Claude Sonnet 3.6 (2022-10-22)
Claude Sonnet 3.6 (2022-10-22)Runner-up

No community votes yet. On paper, OpenAI o3 has the edge — bigger model tier, newer.

Too close to call
Writing DNA

Style Comparison

Similarity
93%

OpenAI o3 uses 6.7x more headings

Claude Sonnet 3.6 (2022-10-22)
OpenAI o3
66%Vocabulary68%
74wSentence Length14w
0.72Hedging0.26
0.3Bold0.7
8.9Lists3.0
0.00Emoji0.00
0.06Headings0.38
0.09Transitions0.12
Based on 21 + 16 text responses
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Claude Sonnet 3.6 (2022-10-22)OpenAI o3

279 AI models invented the same fake scientist.

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