OpenAI says the PHP security flaw (found with GPT-5.6 Sol) is the tip of the iceberg, and they have several more discoveries to announce.

The PHP security team is giving advance notice: Upcoming security release Wed, Oct 21st 2026, 14:00UTC, two critical vulnerabilities, both rated CVSSv4 9.2. PHP users are encouraged to prepare to update. Earlier release if details become public or active exploit evidence.

Introducing tiny.london A massive isometric pixel map of London, based on amazing NYC demo by @_coenen from 9 months ago My agent created the dataset, finetuned qwen image LoRA adapter, did a multiday inference run and built an efficient tile viewer!

notice.. > Delta is blocking AI agents from booking flights > JPMorgan Chase and Charles Schwab block agents from accessing accounts > Yelp requires paid data licensing for agents > Amazon has blocked Grok bot and other shopping agents. the internet is starting to block AI agents that were supposed to do everything for us

Why have I bought into the Muskonomy? This is why. At 9pm on a Friday night I got in my wife’s car to pick up her Target order. I made it one house down before the car started throwing flat tire warnings. I pulled over and sure enough. It was flat. I very slowly drove it right back into our driveway, hopped out, and filed a claim through the Tesla app with my Tesla insurance. Within minutes a tow truck was dispatched to pick the car up and take it to the nearest Tesla service center. Since they’re open Saturday’s, the car will be ready for pickup tomorrow with a repaired or new tire. On any other car this would be a nightmare. Trying to find a tire shop over Saturday and Sunday, make sure my tire is in stock, pay a towing company to come get it… it would consume the weekend. Not with my @tesla though. A few taps of the screen and all I have to do it pick it up at the end. Wow.

We have built 10 different AI products at PostHog like PostHog AI, our Wizard, Replay Vision, Scouts, and more. Combined, they are used by nearly 100k people every month. Along the way, we’ve learned a lot about building them, what works, and what doesn’t. Here are the 38 most important lessons:

We discovered a sophisticated recording device that was hidden inside one of our offices. We used our models to understand the device and where it had come from, identifying that a specific employee had planted it a few days earlier. We referred the matter to the FBI, and we’re grateful to the agents and prosecutors who moved quickly to make an arrest. The FBI’s investigation is ongoing and we will continue to support their work. At this time, we have no indications of this individual inappropriately accessing or exfiltrating model weights, source code, or customer data. The employee was terminated. We take protecting our technology, data, and people seriously, and as a matter of national importance. Our security program is designed to protect against a wide range of threat actors, from insider risks to cybercriminals to nation states, and this case is an example of how AI can help address these sophisticated security threats.