CodeGen model checkpoints are available on different pre-training data with variable sizes.
The format is: Salesforce/codegen-{size}-{data}, where
size: 350M, 2B, 6B, 16B
data: 
nl: Pre-trained on the Pile
multi: Initialized with nl, then further pre-trained on multiple programming languages data
mono: Initialized with multi, then further pre-trained on Python data