Claude Sonnet 4 vs GPT-5 Codex
Compare Claude Sonnet 4 by Anthropic against GPT-5 Codex by OpenAI, in 101 community votes, claude sonnet 4 and gpt-5 codex are closely matched, tested across 50 shared challenges. Updated June 2026.
Which is better, Claude Sonnet 4 or GPT-5 Codex?
Claude Sonnet 4 and GPT-5 Codex are closely matched based on 101 community votes. Compare their real outputs side by side below.
Key Differences Between Claude Sonnet 4 and GPT-5 Codex
Claude Sonnet 4 is made by anthropic while GPT-5 Codex is from openai. In community voting, In 101 community votes, Claude Sonnet 4 and GPT-5 Codex are closely matched.
In 101 community votes, Claude Sonnet 4 and GPT-5 Codex are closely matched. Claude Sonnet 4 leads in Image Generation, while GPT-5 Codex leads in Web Design, Reasoning. Based on blind community voting from the Rival open dataset of 101+ human preference judgments for this pair.
Per 1M tokens
Too close to call. Pick based on your use case.
Pick Claude Sonnet 4 for Image Generation. Pick GPT-5 Codex for Reasoning, Web Design.
Style Comparison
Claude Sonnet 4 uses 6.4x more sentence length
