HeyJaredLenny's Newsletter
Deeply researched product, growth, and career advice for product leaders, founders, and ambitious builders.
Part of Lenny's Podcast: Product | Career | Growth. Follow the publication for all its platforms.
- Indexed issues, last 90 days
- 17
- Latest publication
- Sep 30, 2026
- Audience
- 1.1M subscribers
- Earliest in this view
- Aug 31, 2026
Latest issues
OpenAI Dev Day 2026: The releases that actually matter (opens the original)
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I spent the day at OpenAI’s DevDay in San Francisco, and I have good news and bad news: OpenAI released a lot of stuff.In this episode, I break down the announcements worth paying attention to - and show you what happened when I tested some of them early. We’ll meet my Dot, explore why Spaces and Sites could matter for how teams work, and get into the model and API updates I’m most excited about as a developer.I use the Decisions API to find podcast thumbnails where nobody looks awkward, build a
Jev: 8 real use cases for the fastest, cheapest model I’ve ever used | John Lindquist (opens the original)
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John Lindquist created egghead.io, a developer education platform used by hundreds of thousands of working engineers. These days he’s building mega.dev, a hands-on program specifically for developers who want to do real work with AI agents, not just prototype them.Listen or watch on YouTube, Spotify, or Apple Podc
All of the Lenny & Friends Summit talks are now online! (opens the original)
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👋 Hey there, I’m Lenny. Each week, I share deeply researched product, growth, and career advice. For more: Lenny’s Jobs | Lennybot | Become an AI-Native Builder and other favorite AI/PM coursesSubscribe now<a class
🎙️ 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 (opens the original)
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<img alt="" class="sizing-normal" height="344" src="https://substackcdn.com/image/fetch/$s_!gWeJ!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F361d81ef-7faf-4d8e-8028-5d5e03432a9a_2329x551.png" title="" width=
Jev for beginners: how to use it and what to build (opens the original)
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Jev is TypeSafe AI’s new decision model. It returns type-safe structured values (a choice, a score, a probability) instead of generated text, at 4 cents per million input tokens with no output charge. This week I ran it on five real projects: PR categorization, a meta-analysis of my own Claude and Codex sessions, Gmail triage, the ChatPRD product insights graph, and a live audience dashboard built from 4,500 YouTube comments.Listen or watch on YouTube, <a href="htt
Publishing over time
Last 90 days. Choose a month to open its work.
Recurring subjects
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Audience
1.1M subscribers
Measured Sep 19, 2026
Source's subscribers, not the number who saw an individual piece.
About this data
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