NewUsage is measured in credits instead of dollars. If you already have a plan, your allowance is unchanged; new plans state what they include up front — 2,400 credits on Starter, 4,000 on Pro, 12,600 on Business.
NewA published rate card in the docs: credits per million tokens read and written, for every model.
ImprovementsFailed requests are never charged.
FixesBalances under half a cent used to round down to zero, so an account with a few credits left was told it had none. Small balances now display and spend correctly.
FixesThe buy-credits dialog quoted a 30% service fee before it finished loading; the real fee has been 15% for a long time.