Billing Options Clarification: Annual vs. Monthly Subscription Choices

I noticed that the upgrade dialog from “My Plan” only shows an option to be billed annually, but the pricing page displays both annual and monthly prices. Could you clarify which billing options are available?

OpenAI offers both monthly and annual billing for the ChatGPT Team subscription. Choose between a Flexible Plan (monthly) or an Annual Plan when upgrading. Upon selecting the Team upgrade, specify seat quantity and select either monthly or annual payment. Note: Annual pricing is calculated at $25/month per seat, while monthly is $30/month per seat.