Bing Chat is an AI-powered assistant based on an advanced large language model (LLM) developed by OpenAI. Mikhail Parakhin, switching the modes in Bing Chat changes fundamental aspects of the bot's behavior, including swapping between different AI models that have received additional training from human responses to its output. The different modes also use different initial prompts, meaning that Microsoft swaps the personality-defining prompt like the one revealed in the prompt injection attack we wrote about in February