According to Sam Altman on Twitter, OpenAI has fully rolled back the latest GPT-4o update for free users and is currently finalizing the rollback for paid users, with updates expected later today (source: @sama, April 29, 2025). For traders leveraging AI-driven strategies, this temporary rollback may affect the reliability and response accuracy of trading bots and sentiment analysis tools dependent on GPT-4o. Market participants should monitor for further official updates as additional fixes to model personality are in progress, which could influence the performance of automated trading systems in the near term.