Compare Claude Opus 4.1 by Anthropic against GPT-5 Pro by OpenAI, in 9 community votes, gpt-5 pro wins 56% of head-to-head duels, context windows of 200K vs 400K, tested across 23 shared challenges. Updated April 2026.
GPT-5 Pro is the better choice overall, winning 56% of 9 blind community votes on Rival. Claude Opus 4.1 costs $15/M input tokens vs $15/M for GPT-5 Pro. Context windows: 200K vs 400K tokens. Compare their real outputs side by side below.
Claude Opus 4.1 is made by anthropic while GPT-5 Pro is from openai. Claude Opus 4.1 has a 200K token context window compared to GPT-5 Pro's 400K. On pricing, Claude Opus 4.1 costs $15/M input tokens vs $15/M for GPT-5 Pro. In community voting, In 9 community votes, GPT-5 Pro wins 56% of head-to-head duels.
In 9 community votes, GPT-5 Pro wins 56% of head-to-head duels. GPT-5 Pro has the edge overall, but performance varies by task type. Based on blind community voting from the Rival open dataset of 9+ human preference judgments for this pair.
GPT-5 Pro has the edge overall. In 9 blind votes, GPT-5 Pro wins 56% of the time.
Claude Opus 4.1 uses 509.5x more bold
vsAsk them anything yourself
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
23 fights queued
Tests an AI's ability to solve a simple but potentially confusing logic puzzle
Let me work through this step-by-step.
Sally has 3 brothers.
Each of Sally's brothers has 2 sisters.
Since Sally is a girl, she is one of the sisters that each brother has.
If each brother has 2 sisters total, and Sally is one of them, then there must be 1 other sister besides Sally.
Therefore, Sally has 1 sister.
1
Explanation: Each brother’s two sisters are Sally plus one other girl. So there are 2 sisters total, meaning Sally has 1 sister.
Tests an AI's randomness and creativity
Tests an AI's ability to simulate personalities and predict future trends
Tests an AI's humor and understanding of current events
Recreate an interactive, classic Mario level in a single HTML file.
Tests an AI's UI design skills with theming support
Tests an AI's ability to engage in philosophical discourse about AI rights
Generate SVG art of a randomly chosen animal in a setting of its choosing.
Generate a unique and simple recipe with common ingredients.
Create a starter plan for improving long-term health.
Design a clean SVG logo for a fictional brand.
Recreate a classic, retro, macOS Desktop UI. Make it interactive and nostalgic, make it as interactive as you can, you can be creative. Feel free to showcase your skills. The entire application must be a single-page self-contained HTML file.
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