When AI Gets Too Smart: The Unexpected Cost of Overpowered Coding Assistants

Developers experimenting with AI coding agents are discovering a counterintuitive challenge: the most capable models like Claude Opus 4.7 may actually hinder development by obscuring design decisions and degrading developer comprehension. Smaller models like Qwen3.6, despite lower raw capability, enforce clearer thinking and maintain the programmer's mental model—the real constraint in high-quality agentic coding.