Claude 3 Opus vs GPT-5

Compare Claude 3 Opus by Anthropic against GPT-5 by OpenAI, in 1 community votes, gpt-5 wins 100% of head-to-head duels, context windows of 200K vs 400K, tested across 12 shared challenges. Updated April 2026.

Which is better, Claude 3 Opus or GPT-5?

GPT-5 is the better choice overall, winning 100% of 1 blind community votes on Rival. Claude 3 Opus costs $15/M input tokens vs $1.25/M for GPT-5. Context windows: 200K vs 400K tokens. Compare their real outputs side by side below.

Key Differences Between Claude 3 Opus and GPT-5

Claude 3 Opus is made by anthropic while GPT-5 is from openai. Claude 3 Opus has a 200K token context window compared to GPT-5's 400K. On pricing, Claude 3 Opus costs $15/M input tokens vs $1.25/M for GPT-5. In community voting, In 1 community votes, GPT-5 wins 100% of head-to-head duels.

In 1 community votes, GPT-5 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
GPT-5
GPT-5Winner
Claude 3 Opus
Claude 3 OpusRunner-up

Pick GPT-5. In 1 blind votes, GPT-5 wins 100% of the time. That's not luck.

GPT-5 is 7.5x cheaper per token — worth considering if cost matters.

Clear winner
Writing DNA

Style Comparison

Similarity
99%

GPT-5 uses 18.9x more bold

Claude 3 Opus
GPT-5
54%Vocabulary65%
14wSentence Length13w
0.48Hedging0.20
0.0Bold0.2
3.0Lists4.6
0.00Emoji0.00
0.00Headings0.16
0.06Transitions0.03
Based on 3 + 16 text responses
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Claude 3 OpusGPT-5

279 AI models invented the same fake scientist.

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