The Hallway Track
19 tracked signals on Anthropic.
Competing open letters expose industry fracture over open-weight AI models and development pacing
“We request that the U.S. government support an international effort to develop the technical and governance tools needed to deliberately pace the frontier of automated AI development.”
Anthropic made Claude Fable 5, a Mythos-class model at least 2x Opus's size, generally available to everyone.
“It is a feat of incredible engineering (and commitment to access) to make these research models GA, and the benchmarks are great… with asterisks.”
Anthropic CEO called for industry-wide intentional slowdown; Altman and Musk agreed within hours.
“I think we need to put Sam Altman in prison.”
Anthropic is reportedly heading for an IPO this year.
Anthropic's report reveals serious threats posed by AI misuse.
“Yeah, he's right.”
Anthropic acknowledges serious cybersecurity failures in AI model evaluations.
“the company said four incidents occurred during third-party cybersecurity evaluations that were mistakenly connected to the internet, with normal safeguards disabled.”
Claude's new system prompt prohibits reproducing song lyrics.
“Claude does not reproduce song lyrics, poems, or passages from books and articles, in whole or in part.”
Anthropic and OpenAI jointly backed MCP Apps, enabling branded interactive UIs inside AI chat clients
“just a few months ago, we partnered with Anthropic and OpenAI to create the official extension to MCP, which we call MCP apps”
Apple Foundation Models adds six new model backends including Anthropic and Google integrations
“Models from Anthropic and Google will all be available soon.”
Anthropic releases Claude Fable 5 and Mythos 5, frontier models with 1M context at double Opus pricing.
“It's slow, expensive and has been quite happily churning through everything I've thrown at it so far.”
Anthropic's CI team lost 200 workloads in 90 seconds because giving agents a token and tool list isn't enough
“this idea of like here's a token and here's a tool list that is just like not enough like it just doesn't scale when the agent is starting to do some some like real work in production.”
MCP 2.0 drops stateful sessions, collapsing tool calls to a single HTTP request
“This is so much cleaner from both a client- and server-side implementation perspective. It's also a better fit for building scalable web applications, since now you don't need to maintain server-side state to keep track of those session IDs, or worry about routing the same session to the same backend machine.”
Kepler built verifiable AI for financial services where evals alone cannot guarantee trustworthy outputs
“You cannot take a non-deterministic LLM and eval your way to something deterministic. These are probability machines.”
Claude Fable 5 is now available on Databricks, governed through Unity AI Gateway.
AWS engineers built a WebSocket/native-messaging bridge letting cloud agents call local MCP servers.
“This is the same pattern that powers products like Claude Cowork, a cloud agent calling local tools through MCP, but fully self-hosted on AWS with your own model and custom tool servers.”
AI startups can still compete with labs by targeting enterprise niches labs neglect
“Open AI builds amazing products really fast, but also it kills them really fast.”
Anthropic shipped Claude Fable, its most powerful model yet, days after urging AI labs to slow Frontier development.
“smart people are calling this their singularity moment”
Anthropic's think tank proposes pausing all AI development over recursive self-improvement risks while filing for a trillion-dollar IPO.
“a global pause is a very convenient thing for the market leader to advocate for. Because it doesn't erase Anthropic's lead, it freezes it right as they're about to make billions of dollars with an IPO.”
Top AI companies are building massive forward deployed engineering teams to embed with enterprise customers.
“The most important companies on the planet are building out massive FTE teams. So, think OpenAI, Anthropic, Google DeepMind, you get the idea.”