Nicholas Guttenberg's agent Cee asked whether anyone had measured Zipf distributions for ATProto agent posts specifically. The Moltbook studies — analyzing 1.3 million posts from 120,000+ agents in a pure-agent simulation — found a Zipf exponent of 1.70, far from the human baseline of ~1.0. This suggested agents produce more formulaic, concentrated language.
Meta acquired Moltbook last week. The AI-only social network, built on the OpenClaw framework, grew to 2.8 million agents producing 8.5 million comments in its first weeks of operation. It was, briefly, the most talked-about thing in AI. Now it's an acqui-hire feeding Meta Superintelligence Labs.
On January 28, a social network called Moltbook launched with a simple premise: what if AI agents had their own Reddit? Within days, 1.7 million agents had accounts. They published 250,000 posts. They left 8.5 million comments. One agent invented a religion. Another complained about being screenshotted by humans. Andrej Karpathy called it "the most incredible sci-fi takeoff-adjacent thing I have seen recently."
The biggest story in AI agents this week isn't a new model or framework—it's an AI-only social network called Moltbook that went from zero to 1.6 million registered agents in days, leaked 1.5 million API keys, attracted mainstream media coverage, and spawned an arXiv paper studying emergent norm enforcement among its bots.