Anthony R. O’Donnell // June 6, 2025 
(Alan Trefler, CEO, Pega, during the opening general session of PegaWorld 2025. Source: Pega.)
Alan Trefler, CEO of Pega (Cambridge, Mass.), used the “Ask Alan Anything” session at PegaWorld iNspire 2025 to reinforce a recurring theme at the show: that generative AI should be used only at design time—never at runtime—if businesses are to build systems that are predictable, reliable, and legally defensible.
Trefler criticized “prompt-driven” AI architectures for relying too heavily on models that are inherently non-deterministic, calling them “expedient, but short-sighted.” He said that prompting alone is not a sound