What an LLM Can and Cannot Do in a Bank

The successful deployments share a shape. A model reads, summarizes, drafts, or classifies. A deterministic system decides, calculates, and records.

The line that keeps holding

Anything that touches a balance stays in code you can read. Anything that touches a document can be a model. Teams that blurred this line spent the following quarter unblurring it.

This is not a statement about capability. It is a statement about what an auditor will accept.