Two housekeeping changes to Copilot land today. On billing, GitHub is re-opening self-serve Business and Enterprise sign-ups for card and PayPal customers — but new seats now have to be paid for before anyone can use them, and accounts get tighter vetting first. On models, a batch of older options drops out of every surface; Claude Sonnet 4.6 survives, though only for individuals on annual plans. If you've pinned a model in your config or CI, confirm it still exists before your next run.