The artificial intelligence company Anthropic said this month that it would share its latest A.I. technology with only a small number of partners because of cybersecurity concerns. On Thursday, Anthropic’s chief rival, OpenAI, took a different approach. The company unveiled a new flagship A.I. model, GPT-5.5, and began sharing the technology with the hundreds of…
When John Lantigua, a retired journalist in Miami Beach, checked his email one recent morning, he was glad to see an invitation. “It was like, ‘Come and share an evening with me. Click here for details,’” Mr. Lantigua said. It appeared to be a Paperless Post invitation from someone he once worked with at The…
When Anthropic told the world this month that it had built an artificial intelligence model so powerful that it was too dangerous to release widely, the company named 11 organizations as partners to help mount a defense. All were from the United States. Within two weeks, the model, called Mythos, had set off a global…
