coding is basically solved for the boring 90% of tasks

just mass refactored a 120 file FastAPI service. 400 steps, 2M tokens, $3 total, zero human input. it confidently introduced a deadlock into my async event handler which was genuinely funny, so the hard 10% still needs opus. ran deepseek v4 and Hunyuan Hy3 preview as the cheap workers. 21B active p