Pro $500 uses included allowance before credits. Enterprise access defaults off and needs an owner to enable it. Eligible Edu uses credits; legacy Enterprise rate-limit plans are excluded. Other self-serve plans cannot use Ultrafast at launch even with purchased credits. Codex and Work share usage; inference residency covers the US and Europe (EEA and Switzerland). The 8x figure measures allowance consumption, not guaranteed speed. API-key usage follows separate pricing.