Go is not free at all (you can't use any of the models you listed without a subscription) and the free Zen models will not be on other CLIs as far as I know.
The free OpenCode Zen models (I've only had the need for DeepSeek v4 Flash & MiMo v2.5 for one-time / throw-away tasks) did work, for me, with GitHub Copilot & Reasonix.