Srini Rajagopal

@mukund @Cursor Same as anthropic

Guess who was the first investor in @Cursor ? In 3. 2. 1.

Excited for what @cyril_mathew and team are building! Happy to have a played a small part in it as an advisor

Over a decade ago at Uber, we were paying drivers across 40 countries. Their top ask: "Pay me faster." That stuck with me through Coinbase and Stripe, where I kept running into the same wall from different angles. Today, Latitude (@rtp) is launching out of stealth. We raised an $8M seed round in Jan 2025 and have been building quietly since then.

@garrytan HBD Garry!

It's my birthday and on my birthday I want to recognize all my haters. Haters do the best marketing. Love your haters.

We knew the Ivy League was racist against east asian and white men, but little did we know they were EXTRA racist against south asians.

@Citrini7 All the best to your dad and hope there is a swift recovery

As some of you know, my dad has been fighting lung cancer for the past 2 years. If any of you have any experience with the medical system, you know that the family/patient have to be aggressive advocates. Doctors have a lot of patients and, as much as I’m sure they’d like to, don’t have infinite time. It’s been pretty amazing to see how AI has enabled my mom to be an advocate by translating medical terminology and explaining complex issues. Definitely makes things a lot easier and has made the entire process more manageable. Whenever we get a new test result, she puts it into chat GPT or Claude and (especially now that it has memory) it updates her on what’s going on. Incredibly helpful and really has maximized the communication with his team.

@akshay_pachaar Good writeup! does this work for continual learning? how is reward hacking prevented?

@TejuAdeyinka @StanfordHAI Thank you @TejuAdeyinka!

@srini @StanfordHAI Hi Srini! I heard from the team that this issue has now been resolved.

If you have a 14–16-year-old, encourage them to apply to Stanford AI4ALL (by @StanfordHAI). Incredible early exposure to AI and future careers in tech. (Applications close in 2 days) Learn more and apply: ai4all.spcs.stanford.edu

@hallerite @grok summarize what’s novel about this paper

I haven't been as excited about a paper in a long time, but MaxRL (terrible name, btw) is really elegant. The jury is still out on how this scales, but I will definitely do some ablations with this.

@nzisakiilu Thank you!

@srini I’m alumni not employee. All the best, it will prob resolve soon.

Stanford AI4ALL is open to current 9th graders (ages 14-15 during the program) interested in AI—no prior experience needed. International students can apply, with financial aid available. It offers both online (June 15-26, 2026) and residential options. Deadline: Feb 6, 2026 at 11:59pm PT. Apply here: ai4all.spcs.stanford.edu More: The Stanford AI4ALL is a 2-week program with lectures on AI topics like Computer Vision, Medical AI, NLP, and Robotics. Students do small-group research projects applying AI to societal issues (e.g., poverty detection via satellite imagery, disaster response with NLP).

@jxmnop Congrats

at long last, the final paper of my phd 🧮 Learning to Reason in 13 Parameters 🧮 we develop TinyLoRA, a new ft method. with TinyLoRA + RL, models learn well with dozens or hundreds of params example: we use only 13 parameters to train 7B Qwen model from 76 to 91% on GSM8K 🤯

@GenAI_is_real @grok what’s the oai build system that’s better than Bazel and how does it work

FAANG is literally panicking refactoring because human code is now the bottleneck. But honestly, monorepos won't save them from the infinite spaghetti code agents are about to dump. OAI already has internal tools for this that make Bazel look like a toy. The era of human "senior engineers" is ending faster than you think @karpathy @sama

@levidiamode How are you doing this? Thanks! I plan to do the same

Day 27/365 of GPU Programming Just did a big review day of everything I learned up to this point since it's so much new stuff I'm trying to remember

@flappyairplanes Congrats @amspector100 @bfspector! Sounds phenomenal

Announcing Flapping Airplanes! We’ve raised $180M from GV, Sequoia, and Index to assemble a new guard in AI: one that imagines a world where models can think at human level without ingesting half the internet.

Performance Hints Over the years, my colleague Sanjay Ghemawat and I have done a fair bit of diving into performance tuning of various pieces of code. We wrote an internal Performance Hints document a couple of years ago as a way of identifying some general principles and we've recently published a version of it externally. We'd love any feedback you might have! Read the full doc at: abseil.io/fast/hints.html

@eshamanideep Congrats @eshamanideep!

Learn more at giga.ai/browser-agent

Introducing Giga's browser agent. Giga can now log in and completes tasks end-to-end, just like your human agents. It used to take months to get support APIs deployed for AI agents in the enterprise. Now these integrations can be built instantly.

@BohanZhangOT @PostgreSQL @OpenAI What’s in cosmosdb versus Postgres? How’s that determined

@PostgreSQL @OpenAI Schema management: Only lightweight schema changes that don’t trigger full table rewrites are allowed, with a strict 5-second timeout. New tables are not permitted and must instead live in sharded systems such as CosmosDB.

@PostgreSQL has long powered core @OpenAI products like ChatGPT and the API. Over the past year, our production load grew 10× and keeps rising. Today we run a single primary with nearly 50 read replicas in production, delivering low double-digit millisecond p99 client-side latency and five-nines availability. In our latest OpenAI Engineering blog, we unpack the optimizations we made to to scale @Azure PostgreSQL to millions of queries per second for more than 800M ChatGPT users. Check out the full post here: openai.com/index/scaling-…

@victoralazarte Congrats @victoralazarte !

Today, Capital One is acquiring Brex for $5.15B, the largest bank–fintech acquisition ever. Great CEOs build great companies. What most people don’t know is that by age 29, Pedro had built two different companies, each generating $500M+ in revenue, with his partner Henrique—something that had never been done before. I met Pedro and Henrique when they were 16, building Pagar me, which later became one of the largest fintechs in Brazil (inside NASDAQ: STNE). I knew very little about fintech then, but it was immediately obvious how exceptional they were. I’m grateful to have been Brex’s first board member and to have invested at a $10m seed valuation. What Pedro cares about most is to build things as they should be so the things we build can outlast us. Pagar me changed the Brazilian financial system and Brex + capital one will change the American. Thank you for having me on this 9 year ride, and thank you for exiting at over 500x the initial valuation I invested in. Cant wait to see all that you will continue building.

@insane_analyst But AMD is not blocked by TSMC capacity?

Intel's Agentic Dumpster-Fire open.substack.com/pub/irrational…