Tim Zaman
@timzaman
Followers
33K
Following
3K
Media
132
Statuses
1K
Frontier Clusters at OpenAI. Formerly DeepMind, Tesla AI (head of AI Infra), X/Twitter, NVIDIA.
San Francisco, CA
Joined June 2010
GPT 5.2 was fun to work on. We are now so good at training large scale jobs, it's set and forget. Days just go by with the giant cluster humming along. OpenAI has the best and deepest hardware health/workload team out there, it's phenomenal. Team is small team but always hiring!
GPT-5.2 is here! Available today in ChatGPT and the API. It is the smartest generally-available model in the world, and in particular is good at doing real-world knowledge work tasks.
66
37
1K
Wow https://t.co/XIYBioljUB - a good posix storage acquisition to follow?
blogs.nvidia.com
NVIDIA will continue to distribute SchedMD’s open-source, vendor-neutral Slurm software, ensuring wide availability for high-performance computing and AI.
3
0
25
Today, we present a step-change in robotic AI @sundayrobotics. Introducing ACT-1: A frontier robot foundation model trained on zero robot data. - Ultra long-horizon tasks - Zero-shot generalization - Advanced dexterity 🧵->
432
659
5K
I have never had so many belly laughs at work as the last couple days. Productivity dropped to 0%. Sora 2 is so good. Cameo's are magical at first, then quickly the remixes are just as fun.
We are launching a new app called Sora. This is a combination of a new model called Sora 2, and a new product that makes it easy to create, share, and view videos. This feels to many of us like the “ChatGPT for creativity” moment, and it feels fun and new. There is something
2
0
21
We own the warehouse, so you get 5000+ groceries & essentials cheaper & faster. Use code WELCOME for 50% off your first order.
18
36
354
Awesome news also for NVIDIA and the community. The existing partnership has already influenced eachother's flagship offerings to a degree that's not widely appreciated. Very exciting we now put the friendship into writing! And the gpus are nice too. <3 NVL72.
Announcing strategic partnership with @nvidia for millions of GPUs — about as much compute as they've shipped in 2025 in total — and an investment up to $100B as these GPUs are deployed:
0
1
16
LIVE5TREAM THURSDAY 10AM PT
1
1
47
This seasons models will make vibe coding roll over as the new default. Saw someone handcoding with pen and paper at blue bottle today. They know.
@tim_zaman @simonw haha nice i love that it just rolls the default over. "coding" basically assume AI assistance as the default coding now, legacy coding becomes "handcoding".
1
2
37
When running your cluster in full-user-responsibility, one failure mode is a priority explosion, where everyone schedules hi pri. 5y ago before implementing hard rules (sad!), as a last ditch effort I introduced a rotating Trophy to shame the biggest offender.. ofc didn't work.
5
0
32
When I interviewed at NVIDIA in 2016, they put me in room "Led Zeppelin". That's when you know. Room next to it - Jethro Tull.. love at first sight
Fun fact: our model is called Kimi, but our company is Moonshot — named after Pink Floyd's The Dark Side of the Moon. We're a team of scientists who love rock (Radiohead, Pink Floyd) and film (Tarantino, Kubrick). A big reason I joined was because the taste just felt right.
2
0
51
The frontier clusters at OpenAI aren't just massive: every component and protocol is bleeding edge. Cluster management boils down to navigating complexity and discovering issues no one has ever seen before. We opened up a dedicated full stack position:
12
23
307
today we are introducing codex. it is a software engineering agent that runs in the cloud and does tasks for you, like writing a new feature of fixing a bug. you can run many tasks in parallel.
1K
3K
36K
Which reminds me, In a former life I spent 2 weeks sitting in front of one - https://t.co/cCVAvnlxP9
1
1
18
Rembrandt didn't paint by himself - as artists grew, they employed a workshop/studio style. Pupils did large parts of the work, signed by Rembrandt. Over time, this master-apprentice model sustains itself by the best apparentices graduating. And retirement by the old master.
Just released Codex, a software engineering agent that can work on many tasks in parallel. It runs on its own cloud-based compute infrastructure, and can fix bugs, answer questions about your code, run tests, etc.. Feels like a step towards the future of software engineering.
2
5
53
if you are interested in infrastructure and very large-scale computing systems, the scale of what’s happening at openai right now is insane and we have very hard/interesting challenges. please consider joining us! we could desperately use your help.
630
546
11K
Great casual overview of the complexities in frontier training runs & frontier systems at OpenAI.
@atootoon here is the full video: https://t.co/RjWJR0OpJ5
0
3
33
Personal news - I joined OpenAI! 🎉 We're going to build and launch the largest (and most delightful) supercomputers to power frontier AI research. DeepMind is obviously truly formidable and to the moon; and I had a great time - but I missed a smaller+tighter team I found in
104
42
2K
Notes on homelab netboot node provisioning through diskless liveboot into ramfs: https://t.co/P3CnmV9t67 - finally found some time to jot it down.
0
1
35