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Spring AI on Local LLMs

By Horatiu Dan 1 min read 2 views 0 comments
Spring AI on Local LLMs
Image: DZone

Why Running It Locally

The usual reason given is privacy, and it’s a real one. A prompt sent to a local model never leaves the machine, which changes the conversation with your security people from a negotiation into a non-event. But three other reasons matter more day to day.

Cost goes to zero at the margin. Iterating on a prompt means running it fifty times. Against a hosted API, it's a line item and a rate limit. Against a local model, it’s free.

Tests stop depending on the Internet. A build that reaches a hosted endpoint is a build that fails when someone modifies a key or a region has a bad afternoon.

You learn where the abstraction leaks. Spring AI presents one ChatClient over every provider. Running a small local model is the fastest way to find out which parts of that promise hold and which parts quietly assume you are talking to a frontier model.

The honest cost is quality and speed. An 8-billion-parameter model on a laptop isn’t a frontier model, and the numbers later in this article are not flattering. That trade is fine for development, prompt iteration, and tests, but it’s a decision to deliberately make for production.

DZone Original story · dzone.com
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