Meta's new AI lets people make chatbots. They're using it for sex.

As Google and OpenAI have grown more secretive about their most powerful AI models, Meta has emerged as a surprising corporate champion of open-source AI. In February it released LLaMA, a language model that's less powerful than GPT-4, but more customizable and cheaper to run. Meta initially withheld key parts of the model's code and planned to limit access to authorized researchers. But by early March those parts, known as the model's "weights," had leaked onto public forums, making LLaMA freely accessible to all.