Monday's Rundown was mostly about a messy split between OpenAI and Cursor, plus a court win for Anthropic against the US Pentagon. I rewrote it the way I would tell a colleague over coffee. Short version: after SpaceX bought Cursor, OpenAI says it will pull its models out by 12 November, pointing at Elon Musk's record on contracts. A federal judge said the Pentagon broke the law when it blacklisted Anthropic. Staff at The Rundown also shared ordinary ways they use AI (fantasy football and a football-analytics site for dad).
The newsletter also carried ads for Blotato (DM automation) and an Optimizely webinar. Skipping those.
Words worth knowing
| Word | In one line |
|---|---|
| Cursor | A popular AI coding editor (the app where developers write software with an AI helper sitting beside the code). |
| Model | The trained AI brain that answers and writes. OpenAI's models power ChatGPT; Cursor can plug several labs' models in. |
| SpaceX | Elon Musk's rocket company. It recently acquired Cursor. |
| Wind-down / cancellation rights | Contract language that lets one side end the deal when ownership changes. OpenAI says that is how it can exit. |
| Frontier model | One of the current top-tier systems (the cutting edge of what labs sell or demo). |
| xAI / Grok | Musk's AI company and its chatbot. OpenAI says xAI trained on OpenAI outputs; Musk called that "partly" true. |
| Anthropic / Claude | The company behind Claude (another major AI assistant). Rival to OpenAI; also a Cursor partner. |
| Windsurf | Another AI coding tool. Anthropic had previously limited access over a possible OpenAI deal — people are comparing that to today's move. |
| Blacklist / supply chain risk | A formal government label that tells agencies to stop using a supplier. Usually aimed at foreign threats, not a US AI lab. |
| Department of War | The US defence department (the newsletter uses this name for the Pentagon). |
| First / Fifth Amendments | US constitutional protections: free speech / fair process. The judge said the blacklist breached both. |
| Codex / ChatGPT Work | OpenAI's coding helper (Codex) and work mode that can drive a browser and fill forms for you. |
| App Store Connect / StoreKit | Apple's dashboard for publishing iPhone apps, and the framework for in-app purchases / subscriptions. |
| Open-source | The recipe is published so others can download, inspect, and run it themselves. |
| Context | How much text / code a model can "keep in mind" in one go. "1M context" means a very large window. |
OpenAI pulls its models from Cursor
OpenAI announced it will remove its models from Cursor (the popular AI coding editor) by 12 November. The trigger: SpaceX acquired Cursor last month. OpenAI says its contract gives it cancellation rights once ownership changes, and that it stretched the wind-down as far as those rights allow. It called the decision "incredibly tough."
The stated reason is Elon Musk's history with agreements. OpenAI's examples include a reported $2 million-a-year tweet deal Musk killed after buying Twitter, and xAI training on OpenAI outputs — which Musk called "partly" true. Musk's reply on X: he "couldn't care less." Cursor CEO Michael Truell pushed for a fix and put OpenAI's share of Cursor's AI traffic at about 5%.
Anthropic co-founder Tom Brown reaffirmed support for Cursor. Commentators compared the episode to Anthropic's earlier move against Windsurf when that tool looked close to an OpenAI deal. Cursor has usually been a neutral editor carrying many frontier models. It is now sitting in the middle of the Altman–Musk fight. The newsletter also notes competition may matter more than ever, with Grok rising and Cursor building its own models.
Why a GP should even care
You will not install Cursor in the treatment room. The useful idea is vendor risk: when your favourite tool depends on someone else's model, a corporate feud can yank the brain out from under the app. Same lesson as an EMR that suddenly loses a pathology feed. If you use any AI coding or documentation helper, ask which model it actually runs and what happens if that lab walks away.
The Rundown Roundtable: how staff use AI
A weekly staff poll. Two practical stories:
- Zach (editor-in-chief): Fantasy football draft prep. He gave Claude the league settings, keepers, and a brain dump of strategy. Claude researched and built a live page (an "artifact") with pick-slot targets. During the draft he updated picks; Claude recalibrated the page. He recommends it as a co-manager.
- Adrian (developer): His dad had barely used AI beyond occasional Gemini questions and had never coded. Adrian installed Claude Code and gave a few prompting tips. Dad built a full football-analytics site and put it on Vercel to show friends. Now he is reworking it for the Premier League season.
Takeaway from the letter: start with a project you actually want, not a blank "learn AI" course.
Practical: ship an iOS app to the App Store with Codex
The how-to walks through taking a working iPhone app from Xcode to the App Store using ChatGPT Work / Codex and App Store Connect.
- Start with a working app (their Part 1 guide). Tell Codex: "Build this app and send it to App Store Connect." It builds, archives, and distributes from Xcode.
- Open App Store Connect in Codex's browser, sign in, and have it fill the listing (description, screenshots, and the rest).
- Complete review fields (contact, age rating, content rights), select the build, and check each answer before continuing.
- Set a price, click "Add for Review", fix any flags, then "Submit for Review".
Pro tip
Want a subscription or one-time premium upgrade? Ask Codex to add Apple's StoreKit framework, then create the product in App Store Connect. Same habit as a paid CPD module: the tech is one step; the store listing and review answers are another.
Court rejects the Pentagon's Anthropic blacklist
A federal judge ruled that the US Department of War (the Pentagon) broke the law when it labelled Anthropic a "supply chain risk." The court said the move looked like payback for Anthropic pushing back on military AI use, not a response to a real security threat.
Key points from the newsletter:
- The label arrived in June and forced Anthropic's frontier Mythos and Fable models offline for nearly a month while both sides sparred in public.
- Anthropic was the first US firm hit with a designation usually reserved for foreign adversaries. Government agencies were told to drop its models.
- Judge Rita Lin held that the blacklist violated the First and Fifth Amendments, and that national security is not a "blank check" to punish critics.
- The label still technically survives while a second case sits in appeals court. The Pentagon has said its "wind down" of Claude usage will finish by 30 September.
A ruling, not the end of the story
This is one judge's decision in an ongoing fight. Anthropic may still lose the Pentagon as a customer. The newsletter's read: the industry felt the June label was retaliatory, and this ruling gives a legal precedent for pushback if governments try the same move on other labs. It does not change how you counsel a patient tomorrow.
Community: local Publisher-to-PDF before the deadline
Reader Zan needed to convert many Microsoft Publisher (.PUB) files to PDF before Publisher retires on 1 October 2026, without using online converters. Working with Claude, they built a small local program that finds .PUB files on a chosen drive, writes high-quality PDFs beside the originals, and a batch file so they did not have to wrestle PowerShell permissions by hand. They also published a reusable prompt for others.
Quick hits
- Tencent released Hy4 preview: a new open-source model (770B, 1M context) pitched as near top open options, especially for coding.
- xAI's Grok Bot added shareable bots and agentic shopping via a Link integration (agents can spend via a single-use card).
- Anthropic announced Claude Code weekly limit changes for 14 September; the newsletter says people read a claimed "raise" as about a 17% cut.
- Fal set up an "infinite stream" of AI video using Minimax H3 Max (about 5 seconds of video in 3 seconds of generation, per the letter).
- Sony Music and Warner Music sued Anthropic (naming CEO Dario Amodei), alleging large-scale ongoing IP theft.
What this means for a GP
None of this is clinical advice, and none of it should change how you treat a patient tomorrow. It is why a busy doctor might still skim the letter. The Cursor story is vendor concentration in plain sight: your favourite tool can lose its best model because two billionaires fell out. Before you depend on any AI scribe or coding helper for clinic admin, know which lab sits underneath and what the exit looks like. The Pentagon–Anthropic ruling is a governance headline — governments can overreach, courts can push back — not a reason to change a prescription. The roundtable bits are the most transferable: give the model a real job (league settings, a site dad actually wants), keep a human in the loop, and ship something small. Zan's local Publisher converter is the same habit as scanning old paper notes before a system is switched off: do the boring migration on your own machine, on your own deadline, before the vendor locks the door.
Sources
- The Rundown AI, 31 August 2026 — OpenAI cuts out SpaceX-owned Cursor.
- OpenAI — Our decision on Cursor following its acquisition by SpaceX (models exit by 12 November).
- CourtListener — Anthropic PBC v. US Department of War (Judge Rita Lin; supply-chain-risk blacklist ruled unlawful).
- The Rundown — Submit your iOS app to the App Store with Codex.
- Tencent — Hy4 preview (open-source model).
- CourtListener — Sony Music Publishing v. Anthropic PBC (Sony/Warner suit).