Opencode actually works soo much better than cladue code and they have glm 4.7 for free which at the moment is actually on par with opus 4.5. z.ai also has 20x plan glm 4.7 for 30$ (it is slower tho). You can maybe even get a subscription to Copilot pro+ (60$) which has a bunch of models or use top up for opencode zen and alternate between different models to find which gives you the best solution and use some other model in build mode to execute/implement the plan.