Anthropic ships frontier AI models but no simple toggle to switch billing modes?

Spent way more time than I should have switching Claude Code (Anthropic's coding agent) from API-key billing back to my Pro subscription. The flow: SSH into a server → attach a tmux session → run a login command → copy an OAuth URL → open a browser → authorize → paste the code back into the terminal.

For a company shipping some of the most advanced AI models out there, this feels like a UX problem that was solved a decade ago. A single command or flag to switch billing mode would save everyone a lot of friction.

Curious if other AI companies handle this better, or if this is just a growing pain across the industry right now.