Own the System, Rent the Model

A question worth asking before signing anything

If the best model in your category changes next quarter, what happens to what you have built?

For most firms the honest answer is uncomfortable. They are on a platform that made the choice for them, and changing it means rebuilding, renegotiating, or waiting for a vendor to get around to it.

Models are the fastest-depreciating part

The frontier resets every few months. Whatever leads today will be mid-table within a year and free the year after. Nobody has a durable edge from renting a particular one, because your competitor can rent it too, at the same price, on the same afternoon.

Treating the model as the strategic decision gets the shape of the problem exactly backwards. It is the most replaceable component in the system, and it should be wired so that replacing it is boring.

What is actually worth owning

Everything the model plugs into. The record: your clients, matters, deals, and the decisions behind them. The schema that gives it structure. The integrations into the systems your firm already runs. The permission model that decides who sees what. The interfaces your people work in every day.

None of that depreciates. It compounds. Each engagement makes the record more useful to the next one, and the model underneath becomes an interchangeable part rather than the foundation.

Ownership is a security position, not just a commercial one

For firms handling confidential work, this stops being about flexibility. Your record should not train anyone else's model. Access should be scoped to how your firm is actually structured. Data should sit in infrastructure you can audit, or your own.

None of that is compatible with renting the whole system from someone whose incentives change when their funding does.

The test we hold ourselves to

You own the code, the schema, and the data, documented well enough that another team could take it over tomorrow. Nothing about the way it is built makes leaving expensive.

That sounds like a concession. It is closer to a discipline. A firm that can leave at any time rarely has to, because everything we ship has to keep earning its place after we hand over the keys.