Elon Musk's xAI company, Grok AI, has been accused of copying ChatGPT, with Grok admitting to violating OpenAI's usage policies. This could involve dataset contamination, with industry insiders speculating that the combination of dataset contamination and hallucinatory responses is the most likely scenario. OpenAI has responded with sarcasm, while Musk has retaliated, revealing that xAI is developing GPT-4. The industry is closely watching the future developments involving Musk and Grok.