Claude 3 Opus vs Gemini 2.5 Pro Experimental

Compare Claude 3 Opus by Anthropic against Gemini 2.5 Pro Experimental by Google AI, in 1 community votes, gemini 2.5 pro experimental wins 100% of head-to-head duels, context windows of 200K vs 1.0M, tested across 11 shared challenges. Updated April 2026.

Which is better, Claude 3 Opus or Gemini 2.5 Pro Experimental?

Gemini 2.5 Pro Experimental is the better choice overall, winning 100% of 1 blind community votes on Rival. Claude 3 Opus costs $15/M input tokens vs $1/M for Gemini 2.5 Pro Experimental. Context windows: 200K vs 1000K tokens. Compare their real outputs side by side below.

Key Differences Between Claude 3 Opus and Gemini 2.5 Pro Experimental

Claude 3 Opus is made by anthropic while Gemini 2.5 Pro Experimental is from google. Claude 3 Opus has a 200K token context window compared to Gemini 2.5 Pro Experimental's 1000K. On pricing, Claude 3 Opus costs $15/M input tokens vs $1/M for Gemini 2.5 Pro Experimental. In community voting, In 1 community votes, Gemini 2.5 Pro Experimental wins 100% of head-to-head duels.

In 1 community votes, Gemini 2.5 Pro Experimental wins 100% of head-to-head duels. Based on blind community voting from the Rival open dataset of 1+ human preference judgments for this pair.

Our Verdict
Gemini 2.5 Pro Experimental
Gemini 2.5 Pro ExperimentalWinner
Claude 3 Opus
Claude 3 OpusRunner-up

Pick Gemini 2.5 Pro Experimental. In 1 blind votes, Gemini 2.5 Pro Experimental wins 100% of the time. That's not luck.

Gemini 2.5 Pro Experimental is 38x cheaper per token — worth considering if cost matters.

Clear winner
Writing DNA

Style Comparison

Similarity
99%

Gemini 2.5 Pro Experimental uses 557.3x more bold

Claude 3 Opus
Gemini 2.5 Pro Experimental
54%Vocabulary54%
14wSentence Length15w
0.48Hedging0.35
0.0Bold5.6
3.0Lists3.9
0.00Emoji0.00
0.00Headings0.39
0.06Transitions0.17
Based on 3 + 18 text responses
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Claude 3 OpusGemini 2.5 Pro Experimental

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
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