Route by Task, Not by Ego

Routing is an economic decision The question is not “What is the best model?” but “What is the cheapest model that still clears the quality bar for this task class?” What good routing looks like Classify work into buckets such as extraction, summarization, transformation, and judgment. Evaluate each bucket. Then reserve the expensive model for prompts whose quality actually degrades on cheaper tiers. Why it works Routing changes unit price per request. When combined with prompt caching and batch lanes, it also reduces the number of high-cost calls that contain long repeated context.

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