Layers 7 through 4 are geared more to the application than the lower layers, which are designed to move packets from one place to another no matter what they contain. Layer 5 provides coordination.

but I’m glad to see that the OSI v1.0 definition requires at least that the complete code for data processing (the primary driver of model quality) be open-source,” said Percy Liang ...

“I don’t think Meta will ever release a fully open-source model that meets the OSI’s definition, as that would enable its rivals to use its models for free,” the analyst continued.

OSI has long set the industry standard for what constitutes open-source software, but AI systems include elements that aren’t covered by conventional licenses, like model training data.