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VOICE ARCHIVE

Lenny Rachitsky

@lennysan
24 posts
2026-02-11
“But it was the model that was released last week (GPT-5.3 Codex) that shook me the most. It wasn't just executing my instructions. It was making intelligent decisions. It had something that felt, for the first time, like judgment. Like taste. The inexplicable sense of knowing
2026-02-11 View on X
Sources

Q&A with Fidji Simo on ChatGPT ads, OpenAI's efforts to ship a new model soon to end Sam Altman's Code Red, Anthropic's Super Bowl ads, Sora, Codex, and more

How ads in ChatGPT will work, what will end the Code Red, those Anthropic attack ads, working with Sam Altman, and much more...

“But it was the model that was released last week (GPT-5.3 Codex) that shook me the most. It wasn't just executing my instructions. It was making intelligent decisions. It had something that felt, for the first time, like judgment. Like taste. The inexplicable sense of knowing
2026-02-11 View on X
Matt Shumer

GPT-5.3-Codex and Claude Opus 4.6 can meaningfully contribute to the improvement of AI models, a sign of what's coming for most knowledge work within five years

Think back to February 2020.  —  If you were paying close attention, you might have noticed a few people talking about a virus spreading overseas.

“But it was the model that was released last week (GPT-5.3 Codex) that shook me the most. It wasn't just executing my instructions. It was making intelligent decisions. It had something that felt, for the first time, like judgment. Like taste. The inexplicable sense of knowing
2026-02-11 View on X
The Decoder

OpenAI updates ChatGPT's deep research tool with GPT-5.2, a full-screen report view, an option to focus research on specific websites, and search interruption

The feature now runs on the new GPT-5.2 model, as OpenAI announced on X. A key addition is that users can connect apps to ChatGPT and—potentially very useful—search specific websit...

2026-01-13
Testing out the new Claude Cowork.  I asked it to go through every Lenny's Podcast episode and pull out the 10 most important themes and lessons for product builders.  Then, the 10 most counterintuitive truths.  I gave it access to a folder with 320 transcripts.  First, it said “This is a substantial task - 320 podcast transcripts to analyze!”  15 minutes later... The 10 most Important themes from Lenny's Podcast [...]
2026-01-13 View on X
Simon Willison's Weblog

Claude Cowork hands-on: a general agent well positioned to bring Claude Code's powerful capabilities to a wider audience, but prompt injection risks remain

New from Anthropic today is Claude Cowork, a “research preview” that they describe as “Claude Code for the rest of your work”.

Testing out the new Claude Cowork.  I asked it to go through every Lenny's Podcast episode and pull out the 10 most important themes and lessons for product builders.  Then, the 10 most counterintuitive truths.  I gave it access to a folder with 320 transcripts.  First, it said “This is a substantial task - 320 podcast transcripts to analyze!”  15 minutes later... The 10 most Important themes from Lenny's Podcast [...]
2026-01-13 View on X
ZDNET

Anthropic debuts Cowork for Claude, built on Claude Code, for automating complex tasks with minimal prompting, as a research preview for Claude Max subscribers

ZDNET's key takeaways  — Anthropic is launching Cowork for Claude as a research preview.  — It's built upon Claude Code and can automate complex tasks.

Very exciting. You can now do the wild stuff Claude Code can locally on your computer right within Claude Desktop. Huge. Will unlock the power of Claude Code to so many more people. (And very cool they linked to my post on CC in their announcement, thanks team @AnthropicAI) [image]
2026-01-13 View on X
ZDNET

Anthropic debuts Cowork for Claude, built on Claude Code, for automating complex tasks with minimal prompting, as a research preview for Claude Max subscribers

ZDNET's key takeaways  — Anthropic is launching Cowork for Claude as a research preview.  — It's built upon Claude Code and can automate complex tasks.

I asked Claude Cowork to identify the 10 most important skills for thriving in the age of AI, based on my 320 podcast conversations. Impressed with the results. Part 1: Timeless Skills (become more valuable) 1. Taste and judgment — The bottleneck when AI generates unlimited
2026-01-13 View on X
ZDNET

Anthropic debuts Cowork for Claude, built on Claude Code, for automating complex tasks with minimal prompting, as a research preview for Claude Max subscribers

ZDNET's key takeaways  — Anthropic is launching Cowork for Claude as a research preview.  — It's built upon Claude Code and can automate complex tasks.

2026-01-12
Testing out the new Claude Cowork. I asked it to go through every Lenny's Podcast episode and pull out the 10 most important themes and lessons for product builders. Then, the 10 most counterintuitive truths. I gave it access to a folder with 320 transcripts. First, it said [image]
2026-01-12 View on X
Simon Willison's Weblog

Hands-on with Claude Cowork: looks well positioned to bring the powerful capabilities of Claude Code to a wider audience, but risks of prompt injections remain

Since the release of Claude Code, software developers have been living in the future.

Very exciting. You can now do the wild stuff Claude Code can locally on your computer right within Claude Desktop. Huge. Will unlock the power of Claude Code to so many more people. (And very cool they linked to my post on CC in their announcement, thanks team @AnthropicAI) [image]
2026-01-12 View on X
ZDNET

Anthropic launches Cowork for Claude, built on Claude Code to automate complex tasks with minimal prompting, as a research preview for Claude Max subscribers

ZDNET's key takeaways  — Anthropic is launching Cowork for Claude as a research preview.  — It's built upon Claude Code and can automate complex tasks.

Testing out the new Claude Cowork. I asked it to go through every Lenny's Podcast episode and pull out the 10 most important themes and lessons for product builders. Then, the 10 most counterintuitive truths. I gave it access to a folder with 320 transcripts. First, it said [image]
2026-01-12 View on X
ZDNET

Anthropic launches Cowork for Claude, built on Claude Code to automate complex tasks with minimal prompting, as a research preview for Claude Max subscribers

ZDNET's key takeaways  — Anthropic is launching Cowork for Claude as a research preview.  — It's built upon Claude Code and can automate complex tasks.

2025-10-07
The next great distribution channel is here. As was foretold by @bbalfour https://www.youtube.com/...
2025-10-07 View on X
OpenAI

OpenAI announces apps that work inside ChatGPT, piloting Booking.com, Canva, Coursera, Figma, Expedia, Spotify, and Zillow for logged-in users outside of the EU

A new generation of apps you can chat with and the tools for developers to build them.  —  Try in ChatGPT(opens in a new window)Start building apps(opens in a new window)

2025-10-03
Replit right behind OpenAI and Anthropic, wow @amasad
2025-10-03 View on X
TechCrunch

a16z releases a report, citing Mercury data, on the top 50 AI companies that startups pay; OpenAI leads, followed by Anthropic, Replit, Freepik, and ElevenLabs

On Thursday, Andreessen Horowitz released its first AI Spending Report in partnership with the fintech firm Mercury.

Interesting: The models most capable of doing human-level work today, according to @mercor_ai: 🥇 GPT 5 🥈 Grok 4 🥉 Gemini 2.5 Flash
2025-10-03 View on X
Mercor

Mercor launches the AI Productivity Index (APEX), which evaluates AI models' ability to perform “economically valuable knowledge work”; GPT-5 leads at 64.2%

still not production-ready Nikita Ostrovsky / Time : AI Is Learning to Do the Jobs of Doctors, Lawyers, and Consultants arXiv.org : The AI Productivity Index (APEX) Agnee Ghosh / B...

2025-09-30
It's a good sign for Stripe this partnership has always felt inevitable
2025-09-30 View on X
CNBC

OpenAI rolls out Instant Checkout to let users make single-item purchases directly in ChatGPT, starting with US Etsy sellers, and plans to add Shopify merchants

the chatbot will start letting its 700,000,000 users shop directly from their chats Jibin Joseph / PCMag : ChatGPT Now Lets You Make Purchases Without Leaving the App Nishit Singh ...

2025-01-15
Worth installing just to witness the many layers of genius that get you to activate, share with friends, and start a paid plan 👏🤯
2025-01-15 View on X
TechCrunch

Nikita Bier, creator of apps like tbh and anonymous compliments app Gas, launches Explode, a freemium app to send disappearing texts and photos via iMessage

Nikita Bier, creator of popular apps like the anonymous polling app tbh (acquired by Facebook) and the anonymous compliments app Gas …

2024-12-21
The best benchmark for tracking progress towards AGI. 2025 is going to be wild.
2024-12-21 View on X
TechCrunch

OpenAI unveils o3 and o3-mini, trained to “think” before responding via what OpenAI calls a “private chain of thought”, and plans to launch them in early 2025

OpenAI announced its new o3 models on Friday.  —  In a tweet ahead of its final livestream for its …

The best benchmark for tracking progress towards AGI. 2025 is going to be wild.
2024-12-21 View on X
ARC Prize

o3, trained on the ARC-AGI-1 Public Training set, scored 87.5% on ARC Prize's Semi-Private Evaluation in a high-compute configuration; GPT-4o scored 5% in 2024

This is “The AI Economy,” a weekly LinkedIn-first newsletter … Sharon Goldman / Fortune : Sam Altman says OpenAI's new o3 ‘reasoning’ models begin the ‘next phase’ of AI. Is this A...

2024-05-01
@esthercrawford ... Congrats!!! Excited to see how you evolve Messenger (which I use multi-daily).
2024-05-01 View on X
Business Insider

Esther Crawford joins Meta's Messenger team as director of product; Crawford was Twitter's director of product management before being laid off in February 2023

Kwan Wei Kevin Tan / Business Insider :

2021-06-25
Congrats @zoink and co! Still feels like Figma is just getting started. https://twitter.com/... https://twitter.com/...
2021-06-25 View on X
Bloomberg

UI design and prototyping tool Figma raises $200M at a valuation of $10B, quintupling its valuation since last year

2021-06-17
Congrats to the nicest, most real, most always-full-of-energy investor there is. Go Harry go! https://twitter.com/...
2021-06-17 View on X
Financial Times

Harry Stebbings, a 24-year-old Londoner with a popular podcast about tech investing, raises $140M fund from MIT, RIT Capital, and founders of Spotify and Calm