Claude Opus 4.1 vs GPT-5 Nano
Compare Claude Opus 4.1 by Anthropic against GPT-5 Nano by OpenAI, in 4 community votes, claude opus 4.1 wins 75% of head-to-head duels, tested across 53 shared challenges. Updated May 2026.
Which is better, Claude Opus 4.1 or GPT-5 Nano?
Claude Opus 4.1 is the better choice overall, winning 75% of 4 blind community votes on Rival. Compare their real outputs side by side below.
Key Differences Between Claude Opus 4.1 and GPT-5 Nano
Claude Opus 4.1 is made by anthropic while GPT-5 Nano is from openai. In community voting, In 4 community votes, Claude Opus 4.1 wins 75% of head-to-head duels.
In 4 community votes, Claude Opus 4.1 wins 75% of head-to-head duels. Based on blind community voting from the Rival open dataset of 4+ human preference judgments for this pair.
Per 1M tokens
Pick Claude Opus 4.1. In 4 blind votes, Claude Opus 4.1 wins 75% of the time. That's not luck.
Style Comparison
Claude Opus 4.1 uses 509.5x more bold
