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We help founders make something people want. Subscribe to our newsletter: https://xitter.cf/t.co/sjqjxxBeLc
San Francisco, CA
Joined February 2010
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Applications for the YC Winter 2027 batch are now open!
Apply by November 2: ycombinator.com/apply
Y Combinator retweeted
Apply to YC and it will change your life
We grew from $0 to $1M annualized revenue during the batch
What you get from YC:
→ $500K investment
→ A cohort of ambitious founders who push you beyond your limits
→ Partners like @garrytan & @gustaf who have your back for life
→ $11.5M in perks and credits
→ Bookface + alumni founder community (also for life)
→ Demo Day in front of thousands of investors
Applications for the YC Winter 2027 batch are now open!
Apply by November 2: ycombinator.com/apply
Y Combinator retweeted
Introducing Pomerado (YC F26): the faster, cheaper, and more reliable alternative to browser use.
Open source. Sign up for free to supercharge your agents 🧵
Y Combinator retweeted
Your agent can run 100 subagents. Your laptop can't.
Tell your agent to use the Prized CLI and every subagent gets its own computer, an exact copy of your box, all running at once.
Prized Sandboxes are available today.
Y Combinator retweeted
today's my birthday, and usually people should be giving me a gift, but instead I want to give everybody a gift 😁
another @VeezaAI launch video!!!
Y Combinator retweeted
I have an announcement.
Today, we make Bill Gates proud.
@heyclicky is now on Windows.
Y Combinator retweeted
absolutely stacked lineup to learn SOTA inference.
thank you @realDanFu, @jmorgan, @joefioti, and @lsyincs
This week’s Paper Club is all about inference.
For every FLOP spent training a model, roughly six go to serving it each year — and getting that part right has produced over $220 billion in market cap in the last decade.
But inference is much more than calling model.forward. Every token has to move through a complicated stack of routing, caching, scheduling, kernels, memory, and hardware, all while balancing speed, cost, and quality.
We brought together researchers and builders from @togethercompute, @ollama, @luminal_ai, and @sgl_project & @radixark to take us through that stack from end to end. We’ll see how a token gets from an API request to a GPU and back, why the same open model can perform differently depending on who serves it, and how new approaches to compilers and caching are making inference faster and more efficient.
00:00 - Why inference matters more than training
08:24 - Three kinds of inference innovation
12:14 - Dan Fu (@realDanFu): the lifecycle of an inference request
42:18 - Jeff Morgan (@jmorgan): not all open model tokens are the same
1:04:31 - Joe Fioti (@joefioti): compiling models with search, not heuristics
1:30:30 - Liangsheng Yin (@lsyincs): SGLang and memory for the agent era
This week’s Paper Club is all about inference.
For every FLOP spent training a model, roughly six go to serving it each year — and getting that part right has produced over $220 billion in market cap in the last decade.
But inference is much more than calling model.forward. Every token has to move through a complicated stack of routing, caching, scheduling, kernels, memory, and hardware, all while balancing speed, cost, and quality.
We brought together researchers and builders from @togethercompute, @ollama, @luminal_ai, and @sgl_project & @radixark to take us through that stack from end to end. We’ll see how a token gets from an API request to a GPU and back, why the same open model can perform differently depending on who serves it, and how new approaches to compilers and caching are making inference faster and more efficient.
00:00 - Why inference matters more than training
08:24 - Three kinds of inference innovation
12:14 - Dan Fu (@realDanFu): the lifecycle of an inference request
42:18 - Jeff Morgan (@jmorgan): not all open model tokens are the same
1:04:31 - Joe Fioti (@joefioti): compiling models with search, not heuristics
1:30:30 - Liangsheng Yin (@lsyincs): SGLang and memory for the agent era
Join us for the next Paper Club on November 4th, where we'll talk AI for biology: events.ycombinator.com/yc-pa…
Y Combinator retweeted
Made a video with @ycombinator on how to launch.
I hope this helps someone out there finally get their first 1000 views, first customers, whatever. This is a game of consistency, not one time viral hits.
TLDR: Record a shitty demo, and just start showing your work.
There’s a misconception that a successful launch video needs to cost tens of thousands of dollars and feel like a high production commercial. But @FarzaTV has a different approach.
Farza is the founder of @heyclicky and previously built Buildspace, one of the largest online schools for people working on their own ideas. He’s been making videos for over a decade, and today his posts regularly get millions of views. Rather than treating launches as rare, high-stakes moments, he’s made them part of the everyday process of building a company.
Farza sat down with YC’s @aaron_epstein to share his playbook for turning demos into stories people actually want to watch. He breaks down how he scripts videos that still feel off the cuff, why founders should launch constantly, and and how to figure out which channels actually convert.
01:44 — Launch Constantly
03:38 — Start Shipping Demos
05:02 — Show the Process
06:07 — The Clicky Launch
07:43 — Write a Hook That Stops the Scroll
10:30 — Why Farza Scripts Every Video
12:04 — Designing the First 10 Seconds
15:15 — Demo-Driven Development
17:25 — You Have to Take a Thousand Shots
20:48 — Farza’s Formula for Videos That Convert
23:01 — Turning Demos Into Stories
24:53 — Show What You're Actually Building
29:11 — Finding Customers on Social Media
31:02 — Which Platforms Actually Convert?
39:01 — Why Farza’s First Hire Was a Filmmaker
40:49 — The Video Stack
45:41 — The 30-Day Launch Challenge
Y Combinator retweeted
LLMs have a score doubling time of 53.9 days on a robotics benchmark between July and October 2026, while speed increased by 4.4x and cost fell by 6.2x.
More results in our new paper: The Bitter Lesson Comes to Robotics 🧵
🛰️ @OrbitalOps_ (W25) has been awarded up to $35M by the DoD to fly a full-scale, in-orbit demo of Astraeus, their cryogenic maneuvering spacecraft.
A typical rocket stage lasts about a week in orbit before its propellant boils away. Astraeus carries onboard refrigeration that keeps its liquid hydrogen and oxygen cold for years, so it can wait in orbit and then maneuver within hours of a command.
payloadspace.com/exclusive-d…
Y Combinator retweeted
Department of War awarded Orbital Operations $35M to demonstrate Astraeus in orbit. A full vehicle scale demo of high thrust propulsion and active refrigeration for long duration storage of cryogenic propellants.
Exclusive from @Payloadspace:
payloadspace.com/exclusive-d…
Y Combinator retweeted
Earlier this week, we announced our Series E. These are my thoughts on how we got here, and where we go next.
legora.com/blog/scaling-fast…
Y Combinator retweeted
Introducing the people search API
1 billion people, one API
> decision makers to sell to
> founders to build with
> engineers to hire
Let your agents find them.
Y Combinator retweeted
persona-2.0-live just doubled its resolution.
2× the resolution, 4× the pixels. The same word-level control over expression.
Try it now: keyframelabs.com
In preview now for all customers, through the platform and the API.
Y Combinator retweeted
we've hired two new helpers for our dinner party: here's steve and miranda pouring pink lemonade for each guest fully autonomously, via a fine-tuned pi0.5 policy 🍋
@lucyjcai and i are testing all kinds of robot control in our quest to host the most robotic dinner party.
Y Combinator retweeted
Your AI is searching the wrong inbox.
You ask ChatGPT if the signed term sheet came in. It checks your work email, finds nothing, and tells you it never arrived.
It's sitting in your personal Gmail.
Most of us juggle 3 to 5 inboxes. Every AI wants its own login, and each one only ever sees part of your mail.
Slashy indexes every inbox once, Gmail and Outlook, and gives your AI one MCP to search all of it. ChatGPT, Claude, Cursor, whatever you use.
Every inbox. One MCP.
Try it for free at slashy.com :)


















