X’s new policy prevents companies from using posts to ‘fine-tune or train’ AI models

X has updated its developer agreement to add a new restriction on using posts on the platform to train AI. The updated policy, spotted earlier by TechCrunch, says developers can’t use content from X or its API to “fine-tune or train a foundation or frontier model.”

The policy change could set up X to make AI training deals with third-party companies, similar to the deal Reddit struck with Google. Reddit, which has a similar policy to block AI crawlers, sued Anthropic on Wednesday over...