GPT-4.1 vs Claude Opus 4

Compare GPT-4.1 by OpenAI against Claude Opus 4 by Anthropic, in 3 community votes, claude opus 4 wins 100% of head-to-head duels, context windows of 1.0M vs 200K, tested across 28 shared challenges. Updated April 2026.

Which is better, GPT-4.1 or Claude Opus 4?

Claude Opus 4 is the better choice overall, winning 100% of 3 blind community votes on Rival. GPT-4.1 costs $2/M input tokens vs $15/M for Claude Opus 4. Context windows: 1048K vs 200K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-4.1 and Claude Opus 4

GPT-4.1 is made by openai while Claude Opus 4 is from anthropic. GPT-4.1 has a 1048K token context window compared to Claude Opus 4's 200K. On pricing, GPT-4.1 costs $2/M input tokens vs $15/M for Claude Opus 4. In community voting, In 3 community votes, Claude Opus 4 wins 100% of head-to-head duels.

In 3 community votes, Claude Opus 4 wins 100% of head-to-head duels. Based on blind community voting from the Rival open dataset of 3+ human preference judgments for this pair.

Our Verdict
Claude Opus 4
Claude Opus 4Winner
GPT-4.1
GPT-4.1Runner-up

Pick Claude Opus 4. In 3 blind votes, Claude Opus 4 wins 100% of the time. That's not luck.

GPT-4.1 is 9.4x cheaper per token — worth considering if cost matters.

Clear winner
Writing DNA

Style Comparison

Similarity
100%

Claude Opus 4 uses 3.9x more transitions

GPT-4.1
Claude Opus 4
58%Vocabulary64%
19wSentence Length62w
0.38Hedging0.52
9.0Bold4.4
6.1Lists9.1
0.24Emoji0.11
1.01Headings1.87
0.07Transitions0.27
Based on 25 + 16 text responses
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GPT-4.1Claude Opus 4

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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