Claude 3 Opus vs Claude Sonnet 4
Compare Claude 3 Opus and Claude Sonnet 4, both from Anthropic, context windows of 200K vs 200K, tested across 12 shared challenges. Updated May 2026.
Which is better, Claude 3 Opus or Claude Sonnet 4?
Claude 3 Opus and Claude Sonnet 4 are both competitive models. Claude 3 Opus 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 3 Opus and Claude Sonnet 4
Claude 3 Opus is made by anthropic while Claude Sonnet 4 is from anthropic. Claude 3 Opus has a 200K token context window compared to Claude Sonnet 4's 200K. On pricing, Claude 3 Opus costs $15/M input tokens vs $3/M for Claude Sonnet 4.
Per 1M tokens
Claude Sonnet 4 is cheaper on both — 5.0× input, 5.0× output
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Claude Sonnet 4 is 5.0x cheaper per token — worth considering if cost matters.
Style Comparison
Claude Sonnet 4 uses 503.7x more bold
