Some AI models are “open” — you can download the weights and run them yourself — while others are “closed” and only reachable through an API.
This explainer covers what each approach means for privacy, cost, control, and raw capability. Open models give you ownership and offline use; closed models often lead on the frontier but keep you tied to a provider. Neither is simply better — the right choice depends on whether you value control and privacy or peak performance and convenience.
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