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o3 Mini vs Claude Sonnet 4.6

Compare o3 Mini by OpenAI against Claude Sonnet 4.6 by Anthropic, context windows of 64K vs 1.0M, tested across 53 shared challenges. Updated April 2026.

Which is better, o3 Mini or Claude Sonnet 4.6?

o3 Mini and Claude Sonnet 4.6 are both competitive models. o3 Mini costs $1.1/M input tokens vs $3/M for Claude Sonnet 4.6. Context windows: 64K vs 1000K tokens. Compare their real outputs side by side below.

Key Differences Between o3 Mini and Claude Sonnet 4.6

o3 Mini is made by openai while Claude Sonnet 4.6 is from anthropic. o3 Mini has a 64K token context window compared to Claude Sonnet 4.6's 1000K. On pricing, o3 Mini costs $1.1/M input tokens vs $3/M for Claude Sonnet 4.6.

Our Verdict
Claude Sonnet 4.6
Claude Sonnet 4.6
o3 Mini
o3 MiniRunner-up

No community votes yet. On paper, Claude Sonnet 4.6 has the edge — bigger model tier, newer, bigger context window.

o3 Mini is 3.4x cheaper per token — worth considering if cost matters.

Slight edge
Writing DNA

Style Comparison

Similarity
87%

Claude Sonnet 4.6 uses 19.1x more emoji

o3 Mini
Claude Sonnet 4.6
65%Vocabulary56%
17wSentence Length36w
0.74Hedging0.53
3.9Bold5.1
1.7Lists3.4
0.00Emoji0.19
0.47Headings2.10
0.38Transitions0.02
Based on 12 + 23 text responses
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