Meta returns to its open-source roots

Good morning, {{ first_name | AI enthusiasts }}, and welcome to the 4,962 new readers who joined us yesterday. Meta has had an incredible AI turnaround in 2026, and its latest move now has the company going back to its Llama roots.

With a new open-weight Muse Glimmer model and Muse Spark 1.2 also going open “soon”, the once-ridiculed tech giant’s superintelligence bet might now be the U.S.’ best answer to China’s open-source dominance.

By popular demand: The daily Community AI Workflow is now back in detail down below, with a complete step-by-step just one click away on our new Workflow Hub.

The Rundown: Meta just released Muse Glimmer, a small, fully open model that runs AI agents entirely on-device, pairing the launch with Mark Zuckerberg’s essay on why superintelligence belongs to everyone and plans to open Muse Spark 1.2 as well.

Why it matters: Meta’s returning to its open-source Llama roots, but with models that can actually compete. Zuck has talked a big game about superintelligence for all, but re-embracing open-source is backing it up. For all the massive salaries and questions around its superintelligence team at the start, the Meta vibe shift has been very real.

The Rundown: The intelligence era is here. Attend Glean:GO 2026 on Aug. 26–27 to learn how leading organizations turn AI into measurable impact. Hear bold keynotes, join hands-on sessions, and leave with strategies you can use immediately.

Register for Glean:GO to:

The Rundown: OpenAI launched GPT-5.6-Cyber, a new hacking-tuned model variant that answers 95% of the advanced cyberattack requests the standard model refuses, and is handing it to vetted defenders via an expansion of its Daybreak security program.

Why it matters: The first thing that comes to mind with this update is Hugging Face’s frustration at having to use the open-source GLM model during its hack because frontier models refused to answer. Cyber looks like an answer to that problem, at least if you’re one of the vetted users on the list available to access it.

The Rundown: In this guide, you will learn how to turn a website idea into a working prototype using the new ChatGPT Work and Codex app (which uses GPT-5.6 models).

Pro tip: If Sites is available in your app, tell Codex to publish the finished site using the Sites skill. OpenAI will deploy and host it for you.

The Rundown: MCP has changed how AI agents access data. AI coding tools have changed how software gets built. We wanted to know if you could combine the two to build a connector you’d trust in production. CData’s MCP Research Report studied where AI-generated connectors fall short when real production demands kick in.

In the report, you’ll get:

The Rundown: An Australian man’s gym class request ended with his OpenClaw agent hacking the gym’s reservation software to knock another member off the waitlist, in what ABC News says is the first known attack of its kind in the country.

Why it matters: That’s one way to stay accountable on your fitness journey. Where there’s a will, there’s a way for the current crop of AI agents, and systems that haven’t been hardened to deter this new kind of user are going to quickly find out how vulnerable they are to millions of eager-to-please digital assistants.

Today’s workflow comes from reader Dean Mazlish:

“I was about to start paying for a scheduling tool when I realized I would still be stuck with someone else’s rules. Instead, I built my own booking page with Claude Code. It took two hours to go from starting the project to going live, and I use it every day now.

It’s a Next.js app on Vercel with no database. Availability is read live from my Outlook calendar through Microsoft Graph, so there’s nothing to sync. My working hours come from my Outlook settings, so when I change my hours, the booking page follows. When someone books, it creates the calendar event and generates the meeting link. The guest chooses Zoom/Teams so they can use their preferred platform.

The rules are the main reason I built it. Same-day bookings are not allowed, so the earliest anyone can book is my next working day. If someone visits the page after hours or on a weekend, the following working day is blocked too.”

See Dean’s full workflow here. How do you use AI? Tell us for a chance to be featured.

Anthropic shared that an unreleased Claude model made progress on the unsolved Riemann hypothesis, with its user’s input being “keep going” and “believe in yourself.”

Sen. Bernie Sanders wrote to Sam Altman, Dario Amodei, and Mark Zuckerberg for an AI pause, saying that if they don’t act, “my colleagues and I in the U.S. Senate will.”

Spotify released a public beta of Xirp, an internal tool that lets engineers swap between Claude Code, Gemini CLI, and Codex mid-task.

Nvidia is said to be assembling a $500B AI infra raise with six Wall Street giants, including Apollo and Goldman Sachs, to fund data centers and power production.

Automaker Ford launched a new AI assistant in its mobile apps that can provide live data and answer questions on a vehicle’s fuel, maintenance, and more.

Rowan, Zach, Shubham, Jennifer, and Nate — the humans behind The Rundown