What LLM are you using to power the in-app Coach?

I’m curious. What kind of AI or LLM is WHOOP using to run WHOOP Coach? Is it a custom model or something like ChatGPT or Gemini?

WHOOP Coach, the AI-powered feature within the WHOOP app, is powered by OpenAI. While it doesn’t say that anywhere in the app, I remember reading about it in a press release when they launched the Coach feature back in 2023/2024. The partnership allows them to offer personalized, conversational responses to users’ health, fitness, and wellness inquiries in real-time.​

My understanding is that WHOOP has a proprietary algorithm that when combined with ChatGPT, custom machine learning models, and individual’s biometric data enables them to deliver tailored advice the way a normal human coach would. I’ve used it for sleep advice, recovery strategies, and honestly have just enjoyed playing with it over the past few year.