Every business building its first machine learning system eventually faces the same fork in the road: let a platform handle model selection automatically, write and control the training process directly, or adjust an existing pretrained model instead of training one from scratch. Platforms like Vertex AI offer all three paths side by side, and choosing the wrong one for a given situation tends to cost real time and money. This blog explains what AutoML, custom model training,

RAG vs Fine Tuning vs Long Context LLMs