Claude Sonnet 4 vs o3 Mini
Compare Claude Sonnet 4 by Anthropic against o3 Mini by OpenAI, context windows of 200K vs 64K, tested across 54 shared challenges. Updated May 2026.
Which is better, Claude Sonnet 4 or o3 Mini?
Claude Sonnet 4 and o3 Mini are both competitive models. Claude Sonnet 4 costs $3/M input tokens vs $1.1/M for o3 Mini. Context windows: 200K vs 64K tokens. Compare their real outputs side by side below.
Key Differences Between Claude Sonnet 4 and o3 Mini
Claude Sonnet 4 is made by anthropic while o3 Mini is from openai. Claude Sonnet 4 has a 200K token context window compared to o3 Mini's 64K. On pricing, Claude Sonnet 4 costs $3/M input tokens vs $1.1/M for o3 Mini.
Per 1M tokens
o3 Mini is cheaper on both — 2.7× input, 3.4× output
No community votes yet. On paper, Claude Sonnet 4 has the edge — bigger model tier, newer, bigger context window.
o3 Mini is 3.4x cheaper per token — worth considering if cost matters.
Style Comparison
Claude Sonnet 4 uses 87.9x more emoji
