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Checked fact 149514 Oct 2026Models and releases

The Open Source Initiative's Open Source AI Definition, version 1.0, says an Open Source AI is an AI system made available under terms and in a way that grant four freedoms.

The exact words it rests on

An Open Source AI is an AI system made available under terms and in a way that grant the freedoms 1 to:

What the source said when we opened it, on 14 Oct 2026.

The source

The Open Source AI Definition 1.0
Open Source Initiative

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In the story

What open weights leave out that open source AI requires 14 Oct 2026

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