AI is worth using where the alternative is worse: reading unstructured documents, classifying free text, surfacing the right record from a large corpus, drafting something a person will review. It is a poor choice where the answer must be exactly right every time and a rule would do the job deterministically.
We build features on top of language models and, where the problem suits it, conventional machine learning: document extraction, search and retrieval over your own content, classification and routing, summarisation, and assistants scoped to a defined task rather than to open-ended conversation.
The engineering that makes these usable is mostly not the model. It is evaluation, so you can tell whether a change made things better; guardrails, so failures are contained; and a review path, so a person stays responsible for consequential decisions.