Elon Musk Introduces xAI's New Product Grok, Faces Embarrassment Over Use of ChatGPT Data. Grok Engineers Admit Accidentally Absorbing ChatGPT Outputs During Training, Leading to Hallucination Issues. Social Media Exposes Grok Responses Citing OpenAI Usage Policies, Drawing Broad Attention. Developers Promise to Address the Issue and Ensure Future Versions Are Not Affected Similarly.