Claude 3.7 Sonnet vs Claude 3 Haiku

Compare Claude 3.7 Sonnet and Claude 3 Haiku, both from Anthropic, context windows of 200K vs 200K, tested across 53 shared challenges. Updated April 2026.

Which is better, Claude 3.7 Sonnet or Claude 3 Haiku?

Claude 3.7 Sonnet and Claude 3 Haiku are both competitive models. Claude 3.7 Sonnet costs $3/M input tokens vs $0.25/M for Claude 3 Haiku. Context windows: 200K vs 200K tokens. Compare their real outputs side by side below.

Key Differences Between Claude 3.7 Sonnet and Claude 3 Haiku

Claude 3.7 Sonnet is made by anthropic while Claude 3 Haiku is from anthropic. Claude 3.7 Sonnet has a 200K token context window compared to Claude 3 Haiku's 200K. On pricing, Claude 3.7 Sonnet costs $3/M input tokens vs $0.25/M for Claude 3 Haiku.

Our Verdict
Claude 3.7 Sonnet
Claude 3.7 Sonnet
Claude 3 Haiku
Claude 3 HaikuRunner-up

No community votes yet. On paper, Claude 3.7 Sonnet has the edge — bigger model tier, newer.

Claude 3 Haiku is 12x cheaper per token — worth considering if cost matters.

Too close to call
Writing DNA

Style Comparison

Similarity
99%

Claude 3.7 Sonnet uses 177.5x more headings

Claude 3.7 Sonnet
Claude 3 Haiku
62%Vocabulary50%
35wSentence Length22w
0.99Hedging0.71
1.2Bold0.3
4.3Lists5.9
0.00Emoji0.00
1.78Headings0.00
0.23Transitions0.08
Based on 13 + 13 text responses
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