The Improve AI SDKs are completely free to use for unlimited decisions, scoring, and ranking.
The Improve AI Gym is free to use for tracking unlimited decisions and rewards. You pay nominal AWS costs incurred from running your Gym on AWS. Most Gym components are AWS Free Tier eligible.
The Improve AI Trainer (FREE) is free to use to train unlimited decision models on up to 100,000 decisions each.
For decision models trained on over 100,000 decisions, the PRO trainer is $2.50 per hour per ml.m5.xlarge instance. For details see Improve AI Trainer (PRO).