Anthropic Shuts Down Access to Newest Models After U.S. Objection

The artificial intelligence lab Anthropic said it had shut down access to its newest and most powerful models after the U.S. government banned use of the technology by foreign nationals, citing national security concerns. The San Francisco-based company said it received a letter from the government that did not specify officials’ concerns, but that it was informed that the government believed there was a method of bypassing safeguards designed to neuter the ability of its Fable model to aid computer hackers.