Heavy AI Users May Waste More Capacity on Routing Than on Prompting

Druss_ · reddit · 2026-09-25

Running a multi-agent system for real work, the author found that locking one model and reasoning level for an entire session—planning, research, trivial checks, hard reasoning, validation—is inefficient. Decomposing work helps: deterministic steps use no model, cheap steps go to fast models, hard steps get strong reasoning, validation is separate, and failures escalate instead of paying max cost upfront. Several small-model runs consumed visibly less paid capacity than one large manual run. His thesis: treat model selection as resource allocation, like assigning tasks to the cheapest competent employee level and escalating exceptions.

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