Anthropic retired a popular AI model and now it's blogging on Substack ...

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

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

What started as a simple newsletter platform and Twitter alternative has grown to encompass videos and podcasts. But what it doesn't involve right now is ads. Instead, Substack makes its money by ...

The 43rd president of the United States launched a Substack site Feb. 16 with a 1,500-word tribute to a predecessor.

As newsletter upstart Substack emerges from a stellar year, co-founder and CEO Chris Best said he wants the platform to become a one-step shop for writers — and to continue being a space for freedom ...