Free the models: Harness design at the frontier

From the source: Replit Blog

Model routers are everywhere right now, but they have a fundamental limitation. No matter if based on advanced heuristics or a small model that reads each turn and picks which LLM to use, a router will always be less capable than the model it’s choosing for. Replit Agent lets the model decide instead. The main agent, or core loop, chooses its subagents’ tier and effort, and adjusts its own as the…

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Originally published by Replit Blog on 30 Sept 2026. Techarda links to the original rather than republishing it. Read the full article →

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