So far, only the sequence dimension has been explored while keeping the peptide length fixed during the optimization. However, it could also be of interest to be able to explore different peptide lengths. Truncation strategies, for instance, are sometimes employed alongside sequence-based strategies to identify the minimal or optimal sequence lengths for binding to a certain protein target. The goal of this task won't only be to benchmark the ability of the method to accurately suggest new peptide sequences with better pIC50s, but also to navigate from one peptide length to the others and being able to find the optimal peptide length, being 9-mers peptides in the context of MHC class I.