AWS CodeCommit pricing models consist of two components: active users and storage & data transfer. Active users are billed monthly, with the first five users free and additional users charged at a flat rate per month. Storage and data transfer costs depend on the amount of data stored in repositories and the volume of Git requests.
Factors contributing to overall cost include:
1. Number of active users beyond the initial five free users.
2. Repository storage size, which is calculated as an average daily amount over a month.
3. Data transfer for both inbound (free) and outbound (charged after a certain threshold).
Optimizing costs can be achieved by minimizing repository sizes, reducing unnecessary data transfers, and managing user access efficiently.