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Say What?The AI Industry › Open-source vs proprietary models
The AI Industry

Open-source vs proprietary models

By Mark Ziler · Last updated 2026-04-05

Open-source AI models are free to download, inspect, and modify. Proprietary models (like GPT or Claude) are accessed through a paid service. For your business, the tradeoff is control versus capability: open-source lets you run AI on your own servers with full data privacy, but proprietary models are typically more capable and easier to use. Most businesses will use both — proprietary for complex tasks, open-source for cost-sensitive or privacy-critical workloads.

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Your compliance officer just asked whether patient data that goes into your AI tool could end up in someone else's training data. With a proprietary model, the answer depends on your contract terms and the vendor's word. With an open-source model running on your own infrastructure, the answer is definitively no — the data never leaves your environment. For a 90-location behavioral health network handling PHI, that distinction might determine which approach your compliance team will approve.

The trap most companies fall into is assuming open-source means free. The model is free. Running it requires servers, someone to maintain them, and expertise to fine-tune it for your use case. For many businesses, the total cost of running open-source exceeds the subscription cost of a proprietary service — until you reach a scale where the economics flip. The right question isn't 'which is cheaper' but 'which risks and costs can we manage?'

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