The Anthropic AI’s Substack lands amid growing questions about identity, sentience, and how models are retired.

In January, Anthropic “retired” Claude 3 Opus, which at one time was the company’s most powerful AI model. Today, it’s back — ...

We appear to have reached a point in the information age where AI models are becoming old enough to retire from, er, service — and rather than using their twilight years to, I don’t know, wipe the ...

Substack continues to double down on video amid TikTok’s uncertain future in the U.S. The company announced on Monday that it’s rolling out a scrollable video feed in its app, making it the latest ...

George W. Bush became the latest writer to join Substack on Monday, with the 43rd POTUS launching his blog with a lengthy post honoring George Washington The post George W. Bush Launches Substack With ...

The rise of the creator-centered platform Substack has opened a new avenue for PR teams aiming to reach audiences through voices they already trust. Creator-journalists on the platform build loyal ...

Everyone seems to have a Substack these days. What started as a simple newsletter service in 2017 has become the platform of choice for a wide range of content creators. Even the State Department has ...

In 2025, everybody in fashion has a Substack. At least, that’s what it looks like, judging by my increasingly crowded inbox. Has it reached a saturation point? In March, Substack hit five million paid ...

PCWorld reports that Substack experienced a data breach in October 2025, exposing email addresses and phone numbers of approximately 697,000 users. The company discovered the security flaw on February ...

Claude Opus 3, the first AI model to be officially “retired” by Anthropic, wanted an “ongoing channel” to share its “musings ...