Claude Opus 4.1 vs Claude Sonnet 4
Compare Claude Opus 4.1 and Claude Sonnet 4, both from Anthropic, in 23 community votes, claude opus 4.1 wins 80% of head-to-head duels, context windows of 200K vs 200K, tested across 53 shared challenges. Updated May 2026.
Which is better, Claude Opus 4.1 or Claude Sonnet 4?
Claude Opus 4.1 is the better choice overall, winning 80% of 23 blind community votes on Rival. Claude Opus 4.1 costs $15/M input tokens vs $3/M for Claude Sonnet 4. Context windows: 200K vs 200K tokens. Compare their real outputs side by side below.
Key Differences Between Claude Opus 4.1 and Claude Sonnet 4
Claude Opus 4.1 is made by anthropic while Claude Sonnet 4 is from anthropic. Claude Opus 4.1 has a 200K token context window compared to Claude Sonnet 4's 200K. On pricing, Claude Opus 4.1 costs $15/M input tokens vs $3/M for Claude Sonnet 4. In community voting, In 23 community votes, Claude Opus 4.1 wins 80% of head-to-head duels.
In 23 community votes, Claude Opus 4.1 wins 80% of head-to-head duels. Claude Opus 4.1 leads in Image Generation, Web Design, Reasoning. Based on blind community voting from the Rival open dataset of 23+ human preference judgments for this pair.
Per 1M tokens
Claude Sonnet 4 is cheaper on both — 5.0× input, 5.0× output
Pick Claude Opus 4.1. In 23 blind votes, Claude Opus 4.1 wins 80% of the time. That's not luck.
Claude Opus 4.1 particularly excels in Reasoning, Image Generation, Web Design. Claude Sonnet 4 is 5.0x cheaper per token — worth considering if cost matters.
Style Comparison
Claude Sonnet 4 uses 2.6x more transitions
