The Improve AI libraries are free to use, modify, and distribute for unlimited ranking, scoring, and data structure optimization.
The Improve AI Trainer (FREE) is free to use to train unlimited models on up to 100,000 logged variants each. This is a good choice for optimizing objects with up to 3 variables and up to 10 variants per variable or optimizing a single variable with up to 50 variants.
The Improve AI Trainer (PRO) is $2.50 per hour per AWS ml.m5.xlarge instance. 1,000,000 logged variants per ml.m5.xlarge can be trained in less than one hour.