Buy, build, or fine-tune

Buy an off-the-shelf API, build something bespoke, or fine-tune a base model on your own data? The honest answer is that it depends, but it depends on a small number of things you can actually reason about: where your advantage lives, what data you own, and how fast you need to ship.

A quick way to decide

• Buy when the capability is a commodity and speed matters more than differentiation. Most teams should start here.
• Fine-tune when you have proprietary data and a task where general models are close but not quite right.
• Build when the system is your moat and no vendor can give you the control, cost, or behavior you need.

Most products end up as a mix: buy the commodity parts, fine-tune the differentiating one, build only what you must own. The mistake is defaulting to "build" because it feels serious, or "buy" because it feels safe.

We help teams choose deliberately, then ship it. Explore our other insights or get in touch if you would like to talk it through.