IBM offers watsonx Code Assistant, a generative AI tool that helps software developers write, explain, and modernize code using natural language prompts, available as a commercial product since October 2023.

Watsonx Code Assistant is powered by IBM's Granite foundation models and integrates directly into developer IDEs such as Visual Studio Code. It supports code generation, code explanation, documentation creation, unit test generation, and language translation (e.g., COBOL to Java). A specialized variant, watsonx Code Assistant for Z, targets mainframe application modernization. A separate variant for Red Hat Ansible Lightspeed generates IT automation playbooks from plain-English prompts.