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Lenny's Newsletter

Newsletter covering AI tools, developer platforms, and tech industry trends including model comparisons, product applications, and career insights for builders and managers. This page collects 786 posts published between June 2023 and October 2026. Recent coverage focuses on AI (Horizontal), Developer Tools and Venture Capital & Startups. Lenny's Newsletter publishes roughly 23 posts a month; the best of them appear in the SandHill weekly digest.

786 posts indexed23 in the last 30 daysAI (Horizontal) · Developer Tools · Venture Capital & Startups · Enterprise SoftwareVisit site ↗

Saturday, 18 July 2026

1 piece
🧠 Community Wisdom: Syncing Claude Code and Claude Design, earning trust when customers assume you vibe coded it, co-founder fallout lessons, personal CRMs, and more

Monday, 13 July 2026

2 pieces
🎙️ How I AI: GPT-5.6 review, How a solo builder runs 24/7 local AI, and What an agent harness is and how to build one
This solo builder runs 24/7 local AI on his own hardware | Alex Finn

Sunday, 12 July 2026

1 piece
How tech workers actually feel about AI in 2026 | Annual AI sentiment survey (Noam Segal)

Saturday, 11 July 2026

1 piece
🧠 Community Wisdom: Negative network effects, managing overconfident colleagues, developers sidestepping design decisions, keeping stakeholder meetings on track, and more

Thursday, 9 July 2026

2 pieces
GPT-5.6 Sol vs. Claude Fable: Why OpenAI’s new model crushes my benchmark
Adam Mosseri: AI is a tailwind for authenticity

Wednesday, 8 July 2026

1 piece
What a harness is and how to build one with Claude Agent SDK

Tuesday, 7 July 2026

1 piece
How tech workers are feeling in 2026: a workforce splitting in two

Monday, 6 July 2026

2 pieces
🎙️ How I AI: Sonnet 5 review & How to run autonomous coding agents from your phone
How I run autonomous coding agents from my phone with OpenAI Symphony + Linear | Alessio Fanelli (Kernel Labs)

Saturday, 4 July 2026

1 piece
🧠 Community Wisdom: Quarterly planning and AI, cash vs. equity comp, paying for interview exercises, AI-powered outbound, compliance startup opportunities, and more

Tuesday, 30 June 2026

2 pieces
Sonnet 5 review: I ran 64 generations to find out if it's worth it
How top PMs increase their leverage with AI

Monday, 29 June 2026

2 pieces
🎙️ How I AI: GLM-5.2 review & How Gusto built a new product line with Claude Code
No Figma. No Jira. No docs. How Gusto built a new product line with Claude Code | Eddie Kim (CTO)

Sunday, 28 June 2026

1 piece
OpenAI Codex lead on the new shape of product work | Andrew Ambrosino

Saturday, 27 June 2026

1 piece
🧠 Community Wisdom: Beating a career slump, adding more structure to an established team, questions for new-team 1:1s, the evolving shape of the growth role, and more

Wednesday, 24 June 2026

1 piece
GLM 5.2: why I’m replacing Opus in Claude Code with this new model

Tuesday, 23 June 2026

1 piece
The new inner game: Your unfair advantage in the age of AI

Monday, 22 June 2026

2 pieces
🎙️ How I AI: How to write AI agent loops in Claude Code and Codex + How Claude Mythos found a 15-year-old bug in Mozilla Firefox
How Claude Mythos found a 15-year-old bug in Mozilla Firefox | Brian Grinstead

Sunday, 21 June 2026

1 piece
Building the most AI-pilled engineering team in the world | Fiona Fung (Manager of the Claude Code and Cowork Teams)

Saturday, 20 June 2026

1 piece
🧠 Community Wisdom: Fractional CPO compensation, free e-signature tools, why some users pay but never use your product, sharing Claude Code context across a team, and more

Wednesday, 17 June 2026

1 piece
How to design AI agent loops: schedules, goals, and subagents in Claude Code and Codex

Monday, 15 June 2026

2 pieces
🎙️ How I AI: Claude Fable 5 review & How Braintrust uses AI agents, evals, and CI to ship better software
How Braintrust uses AI agents, evals, and CI to ship better software | Ankur Goyal

Sunday, 14 June 2026

1 piece
The hidden pattern behind successful products | Mark Pincus (Founder of Zynga)

Saturday, 13 June 2026

1 piece
🧠 Community Wisdom: How AI is changing product operating models, tracking work stress with Whoop, whether you need a portfolio of AI side projects, marketing for tiny teams, and more

Tuesday, 9 June 2026

2 pieces
Claude Fable 5 review: what the new Mythos model gets right (and very wrong)
Essential books for product builders—part 2

Monday, 8 June 2026

2 pieces
🎙️ How I AI: Gemini Omni: Clone yourself with AI in under 15 minutes & Shopping with Claude
Shopping with Claude: How to find quality brands, automate returns, and buy things that last 100 years | Nicole Ruiz

Sunday, 7 June 2026

1 piece
Father of the iPod and iPhone on building taste, judgment, and creativity in the AI era | Tony Fadell

Saturday, 6 June 2026

1 piece
🧠 Community Wisdom: Bootstrapping vs. raising funding, building the roadmap of your vibe-coded app, AI agents and data integrity, your first project as an APM, and more

Wednesday, 3 June 2026

1 piece
Gemini Omni: Clone yourself with AI in under 15 minutes

Monday, 1 June 2026

2 pieces
🎙️ How I AI: Codex Goals explained & Claude Opus 4.8 review & Building an iPhone app with zero technical skills
Building an iPhone app with zero technical skills | Bryce Rattner Keithley

Sunday, 31 May 2026

1 piece
A rational conversation on where AI is actually going | Benedict Evans

Saturday, 30 May 2026

1 piece
🧠 Community Wisdom: Catching people using AI during an interview, org design when everything lives in one person’s head, when to rename your product, from nurse to health-tech PM, and more
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