1What "Open Source" Really Means for an AI Model — In DepthFor a trained model, Advanced 2Open Weights vs Truly Open: Licenses & ProvenanceThe word Advanced 3Running & Serving Open Models EfficientlyRunning a model locally and serving it to thousands of users are different engineering problems — memory, batching, and the decode loop decide which one you can afford.Advanced 4Evaluating & Selecting an Open Model for a WorkloadModel selection is an engineering measurement problem, not a leaderboard lookup — define the job as a contract, then let your own evaluation decide.Advanced 5Open vs Hosted at Production ScaleThe open-versus-hosted choice is really a decision about where obligations live and how costly it is to change your mind later.Advanced