Identifying Software Companies Implementing GPT-4 Features Beyond GenAI-first

Does anyone have any recommendations on how to identify software companies that have GenAI features? Not looking for companies that are GenAI-first, but rather have been around for a while and are implementing products/features using GPT-4 endpoints (so LinkedIn company keyword searches are returning a lot of noise). I tried using the tech-stack waterfall but could only find GPTBot Disallow which is OpenAI's product to exclude a website from scraping they do for their models.