According to a report by AIbase on September 22, 2025, former core developer of Google DeepMind, Dustin Tran, officially announced his joining of Elon Musk’s artificial intelligence company xAI, sparking discussions on social media. Musk quickly retweeted the news, confirming Tran’s new position. It is reported that Tran joined xAI several weeks ago and has been actively involved in the development of Grok4Fast.
Dustin Tran has a deep background in the field of artificial intelligence. He graduated from the University of California, Berkeley in 2014 with a bachelor’s degree in Mathematics and Statistics, and subsequently pursued a Ph.D. in Statistics at Harvard University. At Columbia University, he further studied Computer Science and earned his Ph.D. in 2018. Tran’s research has been significant, with his papers cited over 24,000 times, and he has received multiple awards including the Google Ph.D. Fellowship.
Throughout his career, Tran has made outstanding contributions at both OpenAI and Google. During his eight years at Google Brain, he co-authored several foundational papers and led a team that successfully launched the Gemini model, which performed excellently in various evaluations. In his resignation statement, he reflected on his time at Google and expressed gratitude towards the company and his team.
One of the reasons Tran chose to join xAI is its powerful computational resources. He stated that xAI’s computing capabilities and data resources are very attractive, particularly the Colossus2 system, which has facilitated rapid development. In the early stages, he participated in the release of Grok4Fast, an optimized reasoning model that has performed well in multiple benchmark tests compared to previous versions. According to The Information, Colossus 2 is a supercomputer used by xAI to train its Grok large language model, consisting of over 100,000 Nvidia H100 GPUs.
Musk has also shown great determination to advance xAI, investing 14 trillion (specific currency unit not mentioned) in the Colossus2 project, aiming to strengthen AI research and applications through vast computational power and data. Tran’s joining undoubtedly brings new hope to xAI, and people are looking forward to more surprises from Grok5.
Key Points: Dustin Tran has officially joined xAI from Google DeepMind and is involved in the development of Grok4Fast. Tran has rich experience in the field of artificial intelligence, and his research achievements are widely recognized. xAI, with its strong computational capabilities and data resources, shows potential for rapid development, and people are eagerly anticipating the arrival of Grok5.
Supplementary Background Information:
Google DeepMind:DeepMind is a British artificial intelligence company known for developing AlphaGo, the first computer program to defeat a world champion in the game of Go.
xAI:xAI is an artificial intelligence company founded by Elon Musk in 2023, aiming to develop safe and beneficial AI for humanity.
Grok:A large language model developed by xAI, designed to answer questions in a humorous and rebellious style. Grok has access to real-time data from X (formerly Twitter), enabling it to provide up-to-date information.
Colossus2:A supercomputer used by xAI to train Grok, possessing strong computational power.
Gemini:A multimodal large language model developed by Google, capable of processing various types of data including text, images, audio, and video.
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