Is ChatGPT a Foundation Model? No, ChatGPT is an application built on top of a foundation model, specifically GPT-3.5 or GPT-4. While the underlying model is foundational, ChatGPT itself is a fine-tuned and aligned interface optimized for human dialogue. By Shishir Vahia|2025-06-13T05:09:13-05:00June 13, 2025|Foundation Models Blog FAQ| Share This Articles, Choose Your Platform! FacebookXLinkedInWhatsAppEmail