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claude_dev_blog ยท Nov 9, 2026 ยท news

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Which Claude model should you build with? Fable, Opus, Sonnet, or Haiku

claude.devNov 9, 2026
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In brief

Which Claude model to pick, what they cost, and how to use them together.

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Claude Opus โ€” open the evidence trace โ†’

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