OpenAI’s guidance lists monthly API credits matching the $100, $200 and $500 Pro subscription tiers. Business provides $20 per paid Standard seat or $100 per paid Premium seat, subject to a combined workspace cap of $500 per month. The first grant is prorated for the remaining billing period. Annual Business grants have a $6,000 yearly cap, with separate period and expiry conditions. Developers should check their eligible plan, organization connection and actual grant terms rather than treating a chat subscription and API usage as the same service.