Decagon CEO Argues Closed-Source Models Still Win Most Enterprise AI Work, Even as His Firm Runs 90% Open Source

Decagon co-founder and CEO Jesse Zhang says closed-source frontier models remain the default choice for most enterprise AI deployments—except in mature, high-volume workloads where open-weight models can be tuned for speed and cost. In a company blog post published July 9, 2026, Zhang framed the open-versus-closed debate not as a binary but as a function of how well-understood a given use case has become.