"Use a strong model to orchestrate, a cheap model to execute." This is now the default cost-aware recipe for agentic coding. I believed it and ran the experiment. Opus 4.7 as the orchestrator, locally-hosted Qwen 3.5-9B (zero token cost) as the executor. This should beat running Opus alone on cost. Has to. It did the opposite. The supposedly "free" configuration (Opus + Qwen) came out as the most expensive cloud arm on all three of the code-repair tasks I ran. Higher than Opus solo. H...