a42z — knowledge hub

Trending & Newsworthy (8 stories) 8

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Why did this journal retract two 1940s papers by Max Planck?

DR_MING2026-06-29↑ 1182 comments

The retraction of historic papers by Max Planck raises questions about scientific integrity and the evolving understanding of physics.

Why frontier LLMs can't read the hard documents without experts involved

chelm2026-06-28↑ 160 comments

The limitations of frontier LLMs in reading complex documents without expert involvement highlights the current capabilities and shortcomings of AI technology.

Jimmy is a tool to convert your notes from different formats to Markdown

CTOSian2026-06-28↑ 210 comments

The development of a tool to convert notes from various formats to Markdown addresses a common problem in data compatibility and workflow efficiency.

Writing your own static website generator

3hy2026-06-28↑ 133 comments

The creation of a custom static website generator showcases the potential for innovation and personalization in web development.

About Latency-focused disk benchmarks for Linux VPS environments

ashitlerferad2026-06-29↑ 40 comments

The focus on latency-focused disk benchmarks for Linux VPS environments is crucial for optimizing performance in cloud computing infrastructures.

Designing a Personal Pebble Watchface

lawn2026-06-26↑ 5610 comments

The design of a personal Pebble watchface demonstrates the intersection of technology and user experience in wearable devices.

A glitch in February of the year 0

lukasgelbmann2026-06-26↑ 202 comments

The analysis of a glitch in the year 0 highlights the complexities and quirks of date and time processing in computer systems.

British Origami: the 1955 exhibition by Akira Yoshizawa (2005)

dang2026-06-28↑ 281 comments

The historical context of British Origami and its 1955 exhibition by Akira Yoshizawa provides insight into the evolution of art and technology.

No sections.

AI Model Development 5

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Andrej Karpathy (co-founder of OpenAI, LLM Wiki pattern creator): "Obsidian is the IDE. The LLM is the programmer. The wiki is the codebase.…

@neil_xbt2026-06-29

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Today's suggestion: "How to give yourself a personal BSc in AI engineering (in 3 weeks)."❗️💁🏻‍♀️ Learn these concepts: 1 How A2A Works ⇢ …

@brcyrr2026-06-29

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Yes, Paolo is mostly right — with important nuance. Big-tech closed AI (like OpenAI’s GPTs, Google’s Gemini, Anthropic’s Claude) is pushing …

@Doge4Faithful2026-06-29

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Anthropic and OpenAI are building two very different visions of what a coding agent should be. Co-Work gives Claude Code a persistent works…

@osayawe_terry2026-06-29

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@Mayank_Msd2026-06-29

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AI Adoption and Revenue 3

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The interesting part of Anthropic passing OpenAI in Ramp’s business adoption data is not the leaderboard. It is the use case. Claude seems…

@neuralSchema2026-06-29

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💸📈 Anthropic just hit a $30B revenue run rate, up from $9B just months ago. That likely puts it ahead of OpenAI (~$25B) as demand for Claud…

@airesearcheheu72026-06-29

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Enterprise AI spend is shifting from tokenmaxxing to efficiency. Lindy moved 100% off Claude to DeepSeek. OpenAI and Anthropic filed IPOs t…

@Cynked_ai2026-06-29CynkedAIEconomics

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AI Job Market and Skills 5

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@_Shadow36 @caspereux Join us brother. Full thesis: 6 things. 1) We are becoming a media company - layoffs, AI job displacement, foreign…

@Broom0x2026-06-29

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🚀 2025 tools are getting replaced FAST... And the people who adapt first will win BIG in 2026. 👀 From Google Search → Perplexity From Power…

@dkare10092026-06-29

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A fragmented AI toolchain is the quiet reason most hackathon agents never make it past the demo. Tencent Cloud is addressing that head-on a…

@tencentcloud2026-06-29

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🤖 AI Briefing — June 29, 2026 1. 🧑‍💻 𝗧𝗵𝗲 𝗡𝗲𝘄 𝗔𝗜 𝗧𝗲𝗮𝗺 𝗛𝗮𝘀 𝗙𝗲𝘄𝗲𝗿 𝗝𝗼𝗯 𝗧𝗶𝘁𝗹𝗲𝘀 𝗮𝗻𝗱 𝗠𝗼𝗿𝗲 𝗔𝗿𝗰𝗵𝗲𝘁𝘆𝗽𝗲𝘀 Bryan Cherny’s Claude Code observation is the…

@marcopapa992026-06-29

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Engineering Hiring Holds Up Despite Rising AI-Linked Tech Layoffs https://digitalmarketreports.com/news/73376/engineering-hiring-holds-up-de…

@DMR_news2026-06-29

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AI Toolchain and Infrastructure 5

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🌟 http://Kinematics.app Motion is the language of robotics. http://Kinematics.app is built for robot movement, inverse kinematics, humanoi…

@Daseingram2026-06-28

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Tokenmaxxing sounds like a joke until you treat it as a control-plane problem. The first wave was crude: make AI usage visible, push teams …

@0x_codex2026-06-29

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For applied AI products, the thing you cannot build by prompting is the agentic loop and system prompt. You have to write this part mostly b…

@NoemiTitarenco2026-06-29

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Just open-sourced NBAB! 🚀 Most AI benchmarks only check if the code passes tests. We built a ruthless, git-based benchmark that penalizes a…

@TuracTheThinker2026-06-29AILLMOpenSource

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@MyWestLord By the way, this cluster—the about of mass built behind a specific situation. That is all it can be. Data alone. Try having Cla…

@oroboroslabs_ai2026-06-29

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AI Ethics and Governance 4

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Hey @X, Looking to connect with people building and learning in: • AI Models • AI Agents • LLM Apps • SaaS • Full-Stack • Backend • DevOps …

@Kunyi__ikpe2026-06-29

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PlanBench-XL shows that the frontier-agent bottleneck is no longer tool calling. It is tool-space navigation under partial observability: fi…

@ollobrains2026-06-29

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@xriskology Calling LLM shit "agents" is hilarious. Idk if you want AI to be genuinely agentic...

@emiliesyverson2026-06-29

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@Yuchenj_UW For me the gov made a very bad decision to ban claude and GPT… at this point, I'm not sure Anthropic or OpenAI will catch up any…

@WenCabrel_2026-06-29

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AI Startups and Funding 4

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💻 Hiring: Growth Engineer - Goldsky 📍 Remote (Global) | 💼 Full-Time | 🧑‍💻 AI, TypeScript, Next.js | 💰 Competitive | 🕐 2 hours ago - June 29,…

@crypto_vazima2026-06-29

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🚀 Great Insights from The Institute of Chartered Accountants of India (ICAI) ScaleUp India Summit 2026 The ICAI ScaleUp India Summit 2026 …

@CAdhanji2026-06-29

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Model routing, just like on OpenRouter! $175 in free credits for you to use — log in with GitHub. Available models: GPT 5.5 (OpenAI) Claud…

@cesaremuszka2026-06-29

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I am buying OpenAI credits for really good price so if you have OpenAI credit for sell DM me. Other cloud credits too like Azure, GCP, Digi…

@OnlinePharmaci42026-06-29

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AI Research and Advancements 5

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This is why I keep trusting OpenAI more than Anthropic. Not because OpenAI never breaks. Because when it breaks, someone shows up, owns it…

@gheorgheiuga2026-06-29

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HE RUNS AN AI AGENT ON HIS OWN LAPTOP. PAYS $0 FOR TOKENS. AND HIS DATA NEVER LEAVES HIS MACHINE. at 0:27 he nails the core idea. an auton…

@ami10iv2026-06-29

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𝗥𝗲𝘀𝗲𝗮𝗿𝗰𝗵 𝗪𝗼𝗿𝘁𝗵 𝗥𝗲𝗮𝗱𝗶𝗻𝗴 - 𝗪𝗲𝗲𝗸 𝟮𝟲, 𝟮𝟬𝟮𝟲 This week feels like Cyber AI builder galore. Not another round of vague predictions about AI replac…

@PentesterLab2026-06-29

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Alibaba just sued the US Pentagon after being added to the “Chinese military companies” blacklist on June 8. Meanwhile, their latest AI dro…

@axonis222026-06-29

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NSA AGENCIA DE SEGURIDAD NACIONAL USA EE.UU ESTADOS UNIDOS DE AMÉRICA IA AI INTELIGENCIA ARTIFICIAL INTELLIGENCE CLAUDE ANTHROPIC MYTHOS OPE…

@Rogelio660643342026-06-29

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AI Applications and Use Cases 2

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Imagine having a personal shopper who: • Knows your taste • Remembers every purchase • Compares thousands of products instantly • Never slee…

@Called2aspire2026-06-29

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@coinbureau I’ll cancel my claude right fucking now. Seems like it may be time to short openai/anthropic (figuratively)

@Matt__A12026-06-29

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Last week 24

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The Enterprise AI Reset – Issue #35

Mayfield FundMayfield Fund2026-06-27vc

Meet the a16z Design Engineer Fellows

Andreessen HorowitzAndreessen Horowitz2026-06-26vc

Charts of the Week: Cycles, different but the same

Andreessen HorowitzAndreessen Horowitz2026-06-26vc

Command Zero is betting big on AI-native defense compressing response time

Insight PartnersInsight Partners2026-06-26vc

The Math Stopped Mathing: How AI Is Changing Startup Sales

Madrona Venture GroupMadrona Venture Group2026-06-26vc

NASA’s Artemis II Mission

Andreessen HorowitzAndreessen Horowitz2026-06-25vc

Investing in Netris

Andreessen HorowitzAndreessen Horowitz2026-06-25vc

The Rebel Alliance

Union Square VenturesUnion Square Ventures2026-06-25vc

Investing in Mirendil

Andreessen HorowitzAndreessen Horowitz2026-06-24vc

How AI is rebuilding America’s primary care system

Insight PartnersInsight Partners2026-06-24vc

Introducing Hang Ten: Building the AI-Native Enterprise

Mayfield FundMayfield Fund2026-06-24vc

Keeping The Front Door of Healthcare Open: Our Investment in Assort Health

Menlo VenturesMenlo Ventures2026-06-24vc

The World-Building Doors Are Open, Again.

Andreessen HorowitzAndreessen Horowitz2026-06-23vc

Investing in Probook

Andreessen HorowitzAndreessen Horowitz2026-06-23vc

Menlo Turns 50 and Announces $3B in Fresh Capital to Go ALL IN on AI

Menlo VenturesMenlo Ventures2026-06-23vc

Partnering with Probook: AI for the Trades

Sequoia CapitalSequoia Capital2026-06-23vc

Consumer Rebellion

Union Square VenturesUnion Square Ventures2026-06-23vc

Impeccable by Design

Andreessen HorowitzAndreessen Horowitz2026-06-22vc

How to Win a Space War

Andreessen HorowitzAndreessen Horowitz2026-06-22vc

Investing in Prosper AI

Andreessen HorowitzAndreessen Horowitz2026-06-22vc

On to the Next Bottleneck: What Product & Engineering Leaders Told Us About AI in Software Development

Madrona Venture GroupMadrona Venture Group2026-06-22vc

Announcing Upscale AI’s $190M Series A-1

Mayfield FundMayfield Fund2026-06-22vc

Radical Reads: The Rise of NeoLabs

Radical VenturesRadical Ventures2026-06-22vc

Fomo

Union Square VenturesUnion Square Ventures2026-06-22vc

Last month 18

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Meet the second cohort of a16z New Media Fellows

Andreessen HorowitzAndreessen Horowitz2026-06-19vc

The Rise of NeoLabs

Radical VenturesRadical Ventures2026-06-19vc

New Media, One Year In

Andreessen HorowitzAndreessen Horowitz2026-06-18vc

Introducing the a16z Talent Engineer Fellowship

Andreessen HorowitzAndreessen Horowitz2026-06-18vc

Harnessing Agentic Marketing for the Enterprise: Gradial’s Series C Fundraise

Madrona Venture GroupMadrona Venture Group2026-06-18vc

Frontier No More?

Madrona Venture GroupMadrona Venture Group2026-06-18vc

Investing in Telepatia

Andreessen HorowitzAndreessen Horowitz2026-06-17vc

Investing in Convey

Andreessen HorowitzAndreessen Horowitz2026-06-17vc

Uneven Frontiers

Andreessen HorowitzAndreessen Horowitz2026-06-17vc

How Skyflow ends the false choice of block or unblock for Agent data

Insight PartnersInsight Partners2026-06-17vc

How Trustmi uses AI to make sure every dollar goes where it should

Insight PartnersInsight Partners2026-06-17vc

The a16z CFO Community

Andreessen HorowitzAndreessen Horowitz2026-06-16vc

How Tamnoon is tackling the cloud security backlog with autonomous remediation

Insight PartnersInsight Partners2026-06-16vc

The next generation of analytics: Why we invested in Golden Analytics

Insight PartnersInsight Partners2026-06-16vc

The Readiness Gap: The Future of Jobs

Mayfield FundMayfield Fund2026-06-16vc

SpaceX & the Sentient Sun

Andreessen HorowitzAndreessen Horowitz2026-06-15vc

A Cautionary Fable: Why Global Tech Needs Sovereign Foundations

Radical VenturesRadical Ventures2026-06-15vc

CFO as the Capital and Resource Orchestrator – Issue #34

Mayfield FundMayfield Fund2026-06-13vc

Older 78

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The Late-Mover Advantage in AI Applications

Accel - Seed to ScaleAccel - Seed to Scalevcdate-unverified

The AI Stack Is Consolidating. But the Hard Problems Are Elsewhere

Accel - Seed to ScaleAccel - Seed to Scalevcdate-unverified

Insights By Accel

Accel - Seed to ScaleAccel - Seed to Scalevcdate-unverified

SaaS Playbook: Learning from the Practitioners and Building a Community

Accel - Seed to ScaleAccel - Seed to Scalevcdate-unverified

Benchmarks Are Broken: 5 Operator Metrics Every AI Exec Should Track

Accel - Seed to ScaleAccel - Seed to Scalevcdate-unverified

All Insights

Bain Capital VenturesBain Capital Venturesvcdate-unverified

Autodesk enters into an agreement to buy MaintainX for $3.6B

Bain Capital VenturesBain Capital Venturesvcdate-unverified

Celebrating Moveworks + ServiceNow on their agreement to be acquired

Bain Capital VenturesBain Capital Venturesvcdate-unverified

Crusoe’s Climb: Betting on Power Before AI Was Cool

Bain Capital VenturesBain Capital Venturesvcdate-unverified

Legora raises Series D to build the world's first collaborative AI for lawyers.

Bain Capital VenturesBain Capital Venturesvcdate-unverified

Research

Battery VenturesBattery Venturesvcdate-unverified

Case Studies

Battery VenturesBattery Venturesvcdate-unverified

The 75-Year-Old Payroll Problem—And Our Investment in Warp

Battery VenturesBattery Venturesvcdate-unverified

Our Investment in Triomics

Battery VenturesBattery Venturesvcdate-unverified

What It Takes to Build, Scale and Sell in the AI Era: Four Insights from AI✦NY 2026

Battery VenturesBattery Venturesvcdate-unverified

Papaya Global: When AI stops being a feature and becomes the floor