Claude Opus 4.1 vs o3 Mini
Compare Claude Opus 4.1 by Anthropic against o3 Mini by OpenAI, context windows of 200K vs 64K, tested across 53 shared challenges. Updated May 2026.
Which is better, Claude Opus 4.1 or o3 Mini?
Claude Opus 4.1 and o3 Mini are both competitive models. Claude Opus 4.1 costs $15/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 Opus 4.1 and o3 Mini
Claude Opus 4.1 is made by anthropic while o3 Mini is from openai. Claude Opus 4.1 has a 200K token context window compared to o3 Mini's 64K. On pricing, Claude Opus 4.1 costs $15/M input tokens vs $1.1/M for o3 Mini.
Per 1M tokens
o3 Mini is cheaper on both — 14× input, 17× output
No community votes yet. On paper, Claude Opus 4.1 has the edge — bigger model tier, newer, bigger context window.
o3 Mini is 17x cheaper per token — worth considering if cost matters.
Style Comparison
Claude Opus 4.1 uses 38.4x more emoji
