Lenny's Newsletter

Meta’s new ‘Muse Wonder’ model: good for AI agents, bad for designnew

How to tell if a startup has a moat new

🎙️ How I AI: How Meta designed Muse with Alex Cornellnew

How Meta designed Muse: an AI agent people actually want to talk to | Alex Cornell (Design Director)new

Why every company now needs to think and operate like a lab team | Josh Woodward (Google Labs, Gemini, AI Studio)

🧠 Community Wisdom: Community Wisdom Top Contributors Summer Class 2026 + ML recommendation systems, getting back into product after being fired, deciding when to quit a side project, and more

🎙️ How I AI: 8 real Jev use cases + How OpenAI uses ChatGPT Sites (live at DevDay!) + Claire’s DevDay recap

How OpenAI uses ChatGPT Sites (live at DevDay!) | Kath Korevec (Product Lead)

OpenAI’s Head of ChatGPT: We’re entering a new era of AI (again) | Tibo Sottiaux

🧠 Community Wisdom: Getting value from personal AI agents without handing over your inbox, the ego threat of going from IC to manager, uncommon perks to negotiate for, and more

OpenAI Dev Day 2026: The releases that actually matter

Jev: 8 real use cases for the fastest, cheapest model I’ve ever used | John Lindquist

All of the Lenny & Friends Summit talks are now online!

🎙️ How I AI: Jev for beginners + I left Claude for months, Opus 5.5 brought me back + Opus 5.5 vs. GPT-6 Sol bench

Jev for beginners: how to use it and what to build

The grief, loneliness, and burnout sweeping through the tech industry right now | Molly Graham

🧠 Community Wisdom: AI doomerism, speeding up discovery in a big org, verifying engineering answers as a new PM, where analytics adds the most value, and more

Opus 5.5 vs. GPT-6 Sol: which model won my blind taste test?

I left Claude for months. Opus 5.5 is why I'm back

Advanced evals: How to find (and fix) hidden AI failures in your product