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Dan Thomasset (Principal Engineer at Google) says PMs are running circles around Software engineers with AI
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The PM skill that matters in 2026 is taste at speed. Boris Cherny just showed everyone what that looks like.
His Claude Code team at Anthropic doesnāt write PRDs. They build hundreds of working prototypes before shipping a single feature. Boris personally ships 20-30 PRs a day running 5 parallel Claude instances. They built Cowork, a full product for non-engineers, in about 10 days.
Everyone in the replies is debating whether PRDs should die. Wrong conversation. The real question is what happens to the PM who canāt evaluate 15 prototypes and pick the 3 worth shipping.
Because hereās what changes when building costs near zero: the bottleneck moves from ācan we build itā to āshould we ship it.ā PRDs existed because building was expensive and you needed sign-off before committing resources. When a prototype takes 45 minutes instead of 6 weeks, nobody needs a document to authorize exploration. They need someone who can look at working software and say āthis one, not that oneā in real time.
On the Claude Code team, PMs code. Data scientists code. User researchers code. Boris said productivity per engineer grew 70% even as Anthropic tripled in headcount. The coordination cost of translating specs into code disappears when everyone can build. And that changes what a PM is actually good for.
Boris said it himself: āThereās just no way we could have shipped this if we started with static mocks and Figma or if we started with a PRD.ā The old process would have spent more calendar time documenting Cowork than his team spent building it.
This is the Claude Code team today. It will be most fast-moving teams within 18 months. The PMs who thrive will be the ones reviewing prototypes at 9am, killing 80% of them by noon, and shipping the survivors by end of week. Pattern matching across user research, technical feasibility, and business model simultaneously while staring at working software.
The PMs who struggle will be the ones still writing 15-page specs for features that could be prototyped, tested, and validated before the doc hits its first review cycle. Taste at speed is the new moat.
we're making @blocks smaller today. here's my note to the company.
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today we're making one of the hardest decisions in the history of our company: we're reducing our organization by nearly half, from over 10,000 people to just under 6,000. that means over 4,000 of you are being asked to leave or entering into consultation. i'll be straight about what's happening, why, and what it means for everyone.
first off, if you're one of the people affected, you'll receive your salary for 20 weeks + 1 week per year of tenure, equity vested through the end of may, 6 months of health care, your corporate devices, and $5,000 to put toward whatever you need to help you in this transition (if youāre outside the U.S. youāll receive similar support but exact details are going to vary based on local requirements). i want you to know that before anything else. everyone will be notified today, whether you're being asked to leave, entering consultation, or asked to stay.
we're not making this decision because we're in trouble. our business is strong. gross profit continues to grow, we continue to serve more and more customers, and profitability is improving. but something has changed. we're already seeing that the intelligence tools weāre creating and using, paired with smaller and flatter teams, are enabling a new way of working which fundamentally changes what it means to build and run a company. and that's accelerating rapidly.
i had two options: cut gradually over months or years as this shift plays out, or be honest about where we are and act on it now. i chose the latter. repeated rounds of cuts are destructive to morale, to focus, and to the trust that customers and shareholders place in our ability to lead. i'd rather take a hard, clear action now and build from a position we believe in than manage a slow reduction of people toward the same outcome. a smaller company also gives us the space to grow our business the right way, on our own terms, instead of constantly reacting to market pressures.
a decision at this scale carries risk. but so does standing still. we've done a full review to determine the roles and people we require to reliably grow the business from here, and we've pressure-tested those decisions from multiple angles. i accept that we may have gotten some of them wrong, and we've built in flexibility to account for that, and do the right thing for our customers.
we're not going to just disappear people from slack and email and pretend they were never here. communication channels will stay open through thursday evening (pacific) so everyone can say goodbye properly, and share whatever you wish. i'll also be hosting a live video session to thank everyone at 3:35pm pacific. i know doing it this way might feel awkward. i'd rather it feel awkward and human than efficient and cold.
to those of you leavingā¦iām grateful for you, and iām sorry to put you through this. you built what this company is today. that's a fact that i'll honor forever. this decision is not a reflection of what you contributed. you will be a great contributor to any organization going forward.
to those stayingā¦i made this decision, and i'll own it. what i'm asking of you is to build with me. we're going to build this company with intelligence at the core of everything we do. how we work, how we create, how we serve our customers. our customers will feel this shift too, and we're going to help them navigate it: towards a future where they can build their own features directly, composed of our capabilities and served through our interfaces. that's what i'm focused on now. expect a note from me tomorrow.
jack
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I am proud to announce that I have successfully completed the worldās first USA coast to coast fully autonomous drive!
I left the Tesla Diner in Los Angeles 2 days & 20 hours ago, and now have ended in Myrtle Beach, SC (2,732.4 miles)
This was accomplished with Tesla FSD V14.2 with absolutely 0 disengagements of any kind even for all parking including at Tesla Superchargers.
A little something for the @Tesla haters, nothing like FACTS to help.
Recall since 2009:
Tesla - 58
Ford - 623
GM - 520
Toyota - 451
Dodge - 386
Mercedes - 325
Honda - 393
Hyundai - 281
Nissan - 365
Kia - 255
Subaru 291
PERCENTAGE BREAKDOWN
Ford: 15.8%
GM: 13.2%
Toyota: 11.4%
Honda: 10.0%
Dodge: 9.8%
Nissan: 9.2%
Subaru: 7.4%
Hyundai: 7.1%
Kia: 6.5%
Mercedes: 8.2%
Tesla: 1.5%
(Total: 3948 units) ā at California, USA
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In just over a month of ownership with my new Model Y, Tesla has added so many features, over the air, for free.
- Grok
- Light Sync with Rave Cave
- Audio Profiles
- Onboarding Guide
- Adjustable Dashcam playback
- Supercharger site additional info as well as live activity + more
This is in just a month, most other brands donāt improve your car after you get it. The Tesla software and UI teams are truly unmatched.
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There is so much opportunity right now in making AI Agents real for enterprises. The models pack insane capabilities, but to get them into the middle of an enterprise workflow requires significant scaffolding, domain understanding, and context engineering. This is the play.
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Iām invested in the coolest company on the planet $TSLA
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World's first autonomous delivery of a car!
This Tesla drove itself from Gigafactory Texas to its new owner's home ~30min away ā crossing parking lots, highways & the city to reach its new owner
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The first fully autonomous delivery of a Tesla Model Y from factory to a customer home across town, including highways, was just completed a day ahead of schedule!!
Congratulations to the @teslasi teams, both software & AI chip design!
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BREAKING:
THE 2025 AMERICAN-MADE INDEX IS HERE AND TESLA SECURES THE TOP 4 SPOTS ā #1 IS THE TESLA MODEL 3 FOLLOWED BY THE TESLA MODEL Y
Teslas are the most American-made vehicles! šŗšø
$TSLA
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BREAKING:
THE TESLA MODEL Y WAS THE BEST SELLING SUV IN CHINA IN MAY WITH 24,770 UNITS SOLD
$TSLA
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Today, we are releasing the first version of Grok studio, adding code execution and google drive support.
Grok Studio
Grok can now generate documents, code, reports, and browser games. Grok Studio will open your content in a separate window, allowing both you and Grok to collaborate on the content together.
š§µ
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NEWS:
TESLA WILL BE THE LEAST AFFECTED BY THE TARIFFS
Tesla is strongly positioned!
$TSLA

































