Click Upgrade in the Standard or Enterprise plan section.
After upgrading, you will immediately start paying for usage of your Pinecone indexes, including the serverless indexes that were free on the Starter plan. For more details about how costs are calculated, see Understanding cost.
To stop recurring charges, you can downgrade to the free Starter plan. Before you can downgrade, your organization must be under the Starter plan quotas:
No more than 5 indexes, all serverless and in the us-east-1 region of AWS.