Learning Brief — 2026-09-22

What we covered

• AI news: AI & Tech Developments
• PM news: From Lenny's Newsletter: I left Claude for months. Opus 5.5 is why I'm back
• PM learning: From Lenny's Newsletter: I left Claude for months. Opus 5.5 is why I'm back

Mental model

Make the next experiment small enough to learn quickly.

Summary

TechCrunch — AI: Qualcomm launches two new smartphone chips with emphasis on AI. Qualcomm said that its new top chip can run 30B mixture-of-expert model locally. Ars Technica — Technology Lab: Microsoft disrupts AI-assisted platform that compromised 12,000. EvilTokens provided an end-to-end platform that makes mass compromises faster and easier. TechCrunch — AI: Meta admits Muse’s likeness to OpenClaw isn’t a coincidence. Meta says Muse was built from scratch, but acknowledges the AI assistant was "heavily inspired" by OpenClaw — down to some of its workspace filenames and content. TechCrunch — AI: OpenAI launches GPT-6 Sol and Luna, boasting lower cost and fewer mistakes. OpenAI is launching two new models, which it says are cut from the same cloth as Astra. Ars Technica — Technology Lab: IT mistake erases 11 years of viewing history for hospitals’ maternity records. The English hospitals recovered patient care data only. The Verge — AI: Andreessen Horowitz is launching an ‘academy’ with no homework and partnerships with Palantir, Google, and Meta. Venture capital firm Andreessen Horowitz (a16z) is creating an "academy" positioned as a pipeline for young people to build or join a Silicon Valley startup. The "Horowitz Andreessen Academy" will launch with 10 partners, including Anduril, Anthropic, Coinbase, Google, Meta, NVIDIA, OpenAI, Palantir

Today's PM news comes from Lenny's Newsletter. The story is I left Claude for months. Opus 5.5 is why I'm back. 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 I left Claude for months. Opus 5.5 is why I'm back. 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.