Why invest in your own model when ChatGPT exists?

ChatGPT is an excellent general assistant, but many business tasks are of a different kind: you won’t solve defect detection on a production line, demand forecasting or document extraction with it. And even for language tasks, a custom or fine-tuned model has advantages – it keeps to your terminology and style, runs on infrastructure under your control, and at high query volumes works out cheaper than a paid API.