> For the same reason that Microsoft probably continued to train Phi-style models: safety. Releasing an open-source model is terrifying for a large organization. Once it’s out there, your name is associated with it forever, and thousands of researchers will be frantically trying to fine-tune it to remove the safety guardrails.
I don't think this is really an issue in practice. Llama 2 and 3 were uncensored within a week. There's no bad press about this.
What does give a company a bad reputation is crap models. The llama 4 disappointment hurt meta's AI reputation a lot more than some community uncensoring.