Claude Sonnet 3.6 (2022-10-22) vs Gemini 2.5 Pro (I/O Edition)

Compare Claude Sonnet 3.6 (2022-10-22) by Anthropic against Gemini 2.5 Pro (I/O Edition) by Google AI, tested across 35 shared challenges. Updated April 2026.

Which is better, Claude Sonnet 3.6 (2022-10-22) or Gemini 2.5 Pro (I/O Edition)?

Claude Sonnet 3.6 (2022-10-22) and Gemini 2.5 Pro (I/O Edition) are both competitive models. Claude Sonnet 3.6 (2022-10-22) costs $3/M input tokens vs $1.25/M for Gemini 2.5 Pro (I/O Edition). Compare their real outputs side by side below.

Key Differences Between Claude Sonnet 3.6 (2022-10-22) and Gemini 2.5 Pro (I/O Edition)

Claude Sonnet 3.6 (2022-10-22) is made by anthropic while Gemini 2.5 Pro (I/O Edition) is from google. On pricing, Claude Sonnet 3.6 (2022-10-22) costs $3/M input tokens vs $1.25/M for Gemini 2.5 Pro (I/O Edition).

Our Verdict
Gemini 2.5 Pro (I/O Edition)
Gemini 2.5 Pro (I/O Edition)
Claude Sonnet 3.6 (2022-10-22)
Claude Sonnet 3.6 (2022-10-22)Runner-up

No community votes yet. On paper, Gemini 2.5 Pro (I/O Edition) has the edge — bigger model tier, newer.

Too close to call
Writing DNA

Style Comparison

Similarity
96%

Gemini 2.5 Pro (I/O Edition) uses 17.3x more bold

Claude Sonnet 3.6 (2022-10-22)
Gemini 2.5 Pro (I/O Edition)
66%Vocabulary58%
74wSentence Length16w
0.72Hedging0.38
0.3Bold5.8
8.9Lists5.0
0.00Emoji0.00
0.06Headings0.63
0.09Transitions0.01
Based on 21 + 16 text responses
vs

Ask them anything yourself

Claude Sonnet 3.6 (2022-10-22)Gemini 2.5 Pro (I/O Edition)

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026
Free preview13 of 58 slides
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