Learning Brief — 2026-09-29

What we covered

• AI news: AI & Tech Developments
• PM news: From Lenny's Newsletter: All of the Lenny & Friends Summit talks are now online!
• PM learning: From Lenny's Newsletter: All of the Lenny & Friends Summit talks are now online!

Mental model

Make the next experiment small enough to learn quickly.

Summary

TechCrunch — AI: OpenAI’s latest features take direct aim at the app store model. OpenAI is building out the pieces of an alternative to the traditional app store model, turning ChatGPT into a place where software can be discovered and used by people and AI agents alike. TechCrunch — AI: OpenAI repotedly in talks to raise $30B round at $1.4T valuation. The new round is anticipated to be the company's last before its delayed 2027 public debut. ZDNet — AI: LLMjacking can run up your business’ AI bill fast – how to stop it. Google analysts warn that stolen AI credentials are being sold underground, and businesses are footing the bill. TechCrunch — AI: Here’s why OpenAI is absent from Nvidia’s industry-wide effort to end rogue AI agents. OpenAI isn't a public supporter of Nvidia's Open Agent Safety Platform, but it is privately working with Nvidia, TechCrunch has learned. ZDNet — AI: Is ChatGPT your new Google Workspace alternative? Meet Space, Pages, and slides. OpenAI now lets teams create documents, build presentations, and work with AI agents inside ChatGPT TechCrunch — AI: OpenAI takes on Microsoft with the launch of what feels a whole lot like ChatGPT’s own office suite. OpenAI's newly announced suite of office features puts it into mor direct competition with more traditional software companies.

Today's PM news comes from Lenny's Newsletter. The story is All of the Lenny & Friends Summit talks are now online!. For a senior PM, the key takeaway is to watch how product decisions and strategy plays out in practice — not just the headline, but the reasoning behind it.

Today's PM learning comes from Lenny's Newsletter. The core idea is All of the Lenny & Friends Summit talks are now online!. What matters for a senior PM is translating the idea into a repeatable habit: define the user problem clearly, pick a metric that actually reflects value, identify the riskiest assumption, and make the next experiment small enough to learn quickly. Good PM content is rarely magic. It is usually disciplined prioritisation dressed up in nicer prose.