Lenny's Newsletter newsletter by Lenny Rachitsky: latest issues, cadence and price

by Lenny Rachitsky · Substack · Free and paid · 6 a week · last issue Sep 22, 2026 · Active

Issues

20 on file since Sep 1, 2026

20 of 20 issues

Date	Issue	Topic	When
Sep 22	Advanced evals: How to find (and fix) hidden AI failures in your product Sep 22 · AI and agents	AI and agents	2d ago
Sep 22	I left Claude for months. Opus 5.5 is why I'm back Sep 22 · AI and agents	AI and agents	2d ago
Sep 22	Opus 5.5 vs. GPT-6 Sol: which model won my blind taste test? Sep 22 · AI and agents	AI and agents	2d ago
Sep 21	How Warp ships 2,000 PRs a month with AI factories \| Zach Lloyd (CEO, Warp) Sep 21 · AI and agents	AI and agents	3d ago
Sep 21	How I AI: Meta’s Muse review + How Warp ships 2,000 PRs a month with AI factories Sep 21 · AI and agents	AI and agents	3d ago
Sep 20	90 minutes of unfiltered product advice from Snap and Discord’s product chief \| Peter Sellis Sep 20 · Product and growth	Product and growth	4d ago
Sep 19	Community Wisdom: Finding your first users before the product exists, debriefing your own interviews, what to optimize for in the early years of your career, and more Sep 19 · Software engineering	Software engineering	5d ago
Sep 16	Muse review: The personal AI agent that gets consumer UX right Sep 16 · AI and agents	AI and agents	8d ago
Sep 15	60+ new creative growth ideas Sep 15 · Product and growth	Product and growth	9d ago
Sep 14	How Grok Bot designers use AI agents to build personal sites and product prototypes \| John Bai & Peng Zheng Sep 14 · AI and agents	AI and agents	10d ago
Sep 14	How I AI: How two SpaceXAI designers use Grok Bot to do their jobs Sep 14 · AI and agents	AI and agents	10d ago
Sep 12	Community Wisdom: AI basketball coaching, Jira vs. Linear, building a business case for platform teams, favorite AI use cases, and more Sep 12 · AI and agents	AI and agents	12d ago
Sep 8	How we built Grok Bot in a month \| Roman Ugarte (SpaceXAI) Sep 8 · AI and agents	AI and agents	2w ago
Sep 7	Build your own company brain: the enterprise AI playbook from Stripe’s engineering team \| Sharadh Krishnamurthy Sep 7 · AI and agents	AI and agents	2w ago
Sep 7	How I AI: GPT-6 Astra is a banger + Stripe’s AI playbook + Grok Bot vs. OpenClaw: why I replaced my entire agent stack Sep 7 · AI and agents	AI and agents	2w ago
Sep 6	Why companies are becoming a series of loops \| Anish Acharya (a16z) Sep 6 · Product and growth	Product and growth	3w ago
Sep 5	Community Wisdom: Driving AI adoption when habits are the bottleneck, leveling up from APM to a mid-level PM role, converting a wave of new users to subscription, and more Sep 5 · Product and growth	Product and growth	3w ago
Sep 3	GPT-6 Astra is a banger - here’s everything I’ve built Sep 3 · AI and agents	AI and agents	3w ago
Sep 2	Grok Bot vs. OpenClaw: How I replaced my entire agent stack Sep 2 · AI and agents	AI and agents	3w ago
Sep 1	How to turn your AI into a world-class designer Sep 1 · AI and agents	AI and agents	3w ago

About this newsletter

Product management, growth and careers, now heavy on AI products.

Feed

https://www.lennysnewsletter.com/feed

Free or paid

Free and paid on Substack. 83% of its latest 12 issues are for paying subscribers (from its public archive, checked weekly).

Issues per week, last 26 weeks

6 a week, measured over the last six months (or since the feed's oldest issue)

Writes about

AI and agents (15), Product and growth (4), Software engineering (1) in the last six months.

History

Listed on Newsletters Sep 24, 2026. No changes to its feed, price, platform, status or cadence since.

Sources: each newsletter's own public feed or archive, read weekly. Every issue belongs to its author and links to the original; people are shown by initials, never a photo. Logos via logo.dev; trademarks belong to their owners.