ABILENE, Texas (AP) — The afternoon sun was so hot that OpenAI CEO Sam Altman traded his usual crewneck sweater for a T-shirt on the last legs of a Tuesday visit to the massive Stargate artificial intelligence data center complex that will power the future of ChatGPT.

OpenAI announced Tuesday that its flagship AI data center in Texas will be joined by five others around the U.S. as the ChatGPT maker aims to make good on the $500 billion infrastructure investment promoted by President Donald Trump earlier this year.

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