Cua Open-Sources CUA-S1-FORMS, a 706K-Parameter System 1 Model for Filling Web Forms

Cua founder Francesco Bonacci open-sourced CUA-S1-FORMS on Thursday, a 706,048-parameter 'System 1' model that plans form-filling actions in a single forward pass rather than generating a response token-by-token. The MIT-licensed release ships a 2.8 MB checkpoint alongside synthetic-data generation, training, and evaluation code, plus optional integration with Cua Driver. The company frames it as the first checkpoint in a planned family of small, specialist computer-use models for bounded interface decisions.