- In short
- The unified decision logic combines the three task profiles into a single rule: route routine, structured, high-volume tasks to Haiku; route most drafting, synthesis, and analysis to Sonnet; and route complex judgment, high-stakes, or highly ambiguous tasks to Opus. The choice follows the task's profile -- its structure, complexity, and stakes -- not document length, habit, or whichever tier was used last time.
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