How do you do the proxy thing?
I use OpenCode with my ChatGPT subscription, which is officially supported on both sides and a damn good deal (OpenCode Go is great too).
OpenCode has “providers” for many (many!) other services, but these are almost all unofficial and against ToS (Anthropic being famous for ban-hammering people).
Meridian[0] for Claude Code, CLIProxyAPI[1] for everything else
[0] https://github.com/rynfar/meridian
[1] https://github.com/router-for-me/CLIProxyAPI