Claude Opus 4.1 vs GPT-5 Codex
Compare Claude Opus 4.1 by Anthropic against GPT-5 Codex by OpenAI, in 66 community votes, claude opus 4.1 wins 62% of head-to-head duels, tested across 49 shared challenges. Updated June 2026.
Which is better, Claude Opus 4.1 or GPT-5 Codex?
Claude Opus 4.1 is the better choice overall, winning 62% of 66 blind community votes on Rival. Compare their real outputs side by side below.
Key Differences Between Claude Opus 4.1 and GPT-5 Codex
Claude Opus 4.1 is made by anthropic while GPT-5 Codex is from openai. In community voting, In 66 community votes, Claude Opus 4.1 wins 62% of head-to-head duels.
In 66 community votes, Claude Opus 4.1 wins 62% of head-to-head duels. Claude Opus 4.1 leads in Web Design, Analysis, Conversation, while GPT-5 Codex leads in Image Generation, Reasoning. Based on blind community voting from the Rival open dataset of 66+ human preference judgments for this pair.
Per 1M tokens
Pick Claude Opus 4.1. In 66 blind votes, Claude Opus 4.1 wins 62% of the time. That's not luck.
Pick Claude Opus 4.1 for Analysis, Web Design, Conversation. Pick GPT-5 Codex for Reasoning, Image Generation.
Style Comparison
Claude Opus 4.1 uses 5.1x more sentence length
