Claude 3.7 Thinking Sonnet vs o3 Mini
Compare Claude 3.7 Thinking Sonnet by Anthropic against o3 Mini by OpenAI, in 6 community votes, claude 3.7 thinking sonnet wins 75% of head-to-head duels, context windows of 200K vs 64K, tested across 54 shared challenges. Updated May 2026.
Which is better, Claude 3.7 Thinking Sonnet or o3 Mini?
Claude 3.7 Thinking Sonnet is the better choice overall, winning 75% of 6 blind community votes on Rival. Claude 3.7 Thinking Sonnet costs $6/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 3.7 Thinking Sonnet and o3 Mini
Claude 3.7 Thinking Sonnet is made by anthropic while o3 Mini is from openai. Claude 3.7 Thinking Sonnet has a 200K token context window compared to o3 Mini's 64K. On pricing, Claude 3.7 Thinking Sonnet costs $6/M input tokens vs $1.1/M for o3 Mini. In community voting, In 6 community votes, Claude 3.7 Thinking Sonnet wins 75% of head-to-head duels.
In 6 community votes, Claude 3.7 Thinking Sonnet wins 75% of head-to-head duels. Claude 3.7 Thinking Sonnet leads in Image Generation. Based on blind community voting from the Rival open dataset of 6+ human preference judgments for this pair.
Per 1M tokens
o3 Mini is cheaper on both — 5.5× input, 6.8× output
Pick Claude 3.7 Thinking Sonnet. In 6 blind votes, Claude 3.7 Thinking Sonnet wins 75% of the time. That's not luck.
Claude 3.7 Thinking Sonnet particularly excels in Image Generation. o3 Mini is 6.8x cheaper per token — worth considering if cost matters.
Style Comparison
Claude 3.7 Thinking Sonnet uses 3.9x more headings
