TikTok's parent company, ByteDance, has been secretly using OpenAI's technology to develop its own competing large language model (LLM). "This practice is generally considered a faux pas in the AI world," writes The Verge's Alex Heath. "It's also in direct violation of OpenAI's terms of service, which state that its model output can't be used 'to develop any artificial intelligence models that compete with our products and services.'"