Open-weight models — models whose trained weights are published for anyone to download — are now good enough for a lot of everyday work: coding agents, tool use, extraction, summarising. The hard part is no longer the model. It is running it. This post covers the three ways to use an open-weight model, what to check before you pick a hosted API, and the few lines of code it takes to call one from the SDKs you already use. Open-weight is not the same as open source "Open-weight" m...