GPT is the family of generative pre-trained transformer models behind many chat assistants. 'Generative' means it produces text, 'pre-trained' means it learns from a huge corpus before fine-tuning.
In practice, GPT (Generative Pre-trained Transformer) shows up across many AI tools. Below are 8 tools where the idea is useful - open any to see it applied.
The most widely used general-purpose AI chat assistant
AI assistant specialising in long documents and careful reasoning
Google's natively multimodal AI assistant
Open-source desktop and Docker app for private chat over your own documents
Desktop and mobile chat client that runs on your own API keys or a hosted plan
xAI chat assistant with live X data, image generation and voice modes
Open-source desktop assistant that runs local models and connects to cloud APIs
Self-hosted, multi-provider chat platform with agents and team accounts