The cost to execute a 250ms Lambda on the most expensive tier 1M times is about $7.70. If your data is in S3 the cost of 1M GETs at the most expensive is $0.40.

The cost to execute a 250ms Lambda on the most expensive tier 1M times is about $7.70. If your data is in S3 the cost of 1M GETs at the most expensive is $0.40. You don't pay for transfer between S3 and Lambda.