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Justus Mattern

@MatternJustus

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Research Engineer @PrimeIntellect | prev. co-founder https://t.co/fozfCukVT4 (YC S23), research @MPI_IS, physics @RWTH

San Francisco, CA
Joined March 2021
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@MatternJustus
Justus Mattern
2 months
Whenever I feel whiny about problems I have I remind myself that as an SF tech worker I live in a city with 259 sunny days, make more money at 22 than I ever would have in Germany and am surrounded by people that share the same interests and ambitions as me like nowhere else.
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@MatternJustus
Justus Mattern
2 days
RT @designarena_ai: Kimi K2 by @Kimi_Moonshot and Mistral Small 3.2 by @MistralAI just added to leaderboard . Crown your winner at https://….
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@MatternJustus
Justus Mattern
4 days
SYNTHETIC-2 Datasets are now on Huggingface! We’re releasing an SFT dataset collected from the new R1-0528 as well as an RL Dataset with difficulty annotations from various smaller models. Go train some models 🫡.
@PrimeIntellect
Prime Intellect
4 days
Releasing SYNTHETIC-2: our open dataset of 4m verified reasoning traces spanning a comprehensive set of complex RL tasks and verifiers. Created by hundreds of compute contributors across the globe via our pipeline parallel decentralized inference stack.
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@MatternJustus
Justus Mattern
9 days
Highest leverage thing unskilled engineers can do rn to contribute to frontier AI research is vibecoding RL environments.
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@MatternJustus
Justus Mattern
11 days
First tweet is a banger, I will watch his career with great interest.
@chaotic_fang
Alex Fang
12 days
When you're looking through your training samples
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@MatternJustus
Justus Mattern
14 days
We are so back btw (got submitted in final but hey)
@MatternJustus
Justus Mattern
5 months
finally back to grappling regularly after 6+ months of forced break (due to injury) and I only realize now how much not doing it affected my mental health.
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@MatternJustus
Justus Mattern
14 days
great thread, summarizes well why we're particularly excited about RL. higher inference to training compute ratio -> less inter node communication -> better suited for globally distributed training infra with slow connection speeds.
@_kevinlu
Kevin Lu
14 days
So I think something else that doesn't get discussed much is the extrapolation of this inference : training trend. - 2015: back in the day, we would train one model per dataset, and inference it once (to obtain the eval result for our paper).- 2020: with chatgpt, multi-task
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@MatternJustus
Justus Mattern
15 days
It happens too often actually, I’ve wasted so much money on food delivered to the wrong address.
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@MatternJustus
Justus Mattern
15 days
Been on a rough weight cut for comp for the past two weeks and this is what happens when I want to reward myself
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@MatternJustus
Justus Mattern
15 days
RT @khoomeik: Recently had a good chat with @tamaybes. He thinks we aren’t yet in the GPT-3 era of RL and as it scales, cross-task OOD gene….
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@MatternJustus
Justus Mattern
17 days
I'm wondering to what degree a VLM judge matches human preferences here.
@designarena_ai
Design Arena
17 days
🚨 3D Design Battle: DeepSeek-V3 vs Sonnet 4 . @deepseek_ai ranks #1 on for 3D design. One-shot Prompt: Build a model of a globe
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@MatternJustus
Justus Mattern
17 days
RT @PrimeIntellect: We did it — SYNTHETIC‑2 is complete. A planetary-scale decentralized inference run generating 4M verified reasoning sa….
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@MatternJustus
Justus Mattern
17 days
Prime Intellect is nothing without its child laborers.
@vincentweisser
Vincent Weisser
17 days
Our 16yo intern @raphzyyyy contributing our DGX A100s to the SYNTHETIC-2 run, with support from @jackminong - just in time to help finish the run.
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@MatternJustus
Justus Mattern
17 days
slides sneak peek (actually)
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@MatternJustus
Justus Mattern
17 days
I’ll be at the Democratize Intelligence Summit today to speak about why reinforcement learning is ideally suited for a decentralized training setup + share a bit about our work at @PrimeIntellect . Come say hi!.
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@MatternJustus
Justus Mattern
17 days
I’ll be at the Democratize Intelligence Summit today to speak about why reinforcement learning is ideally suited for a decentralized training setup + share a bit about our work at @PrimeIntellect . Come say hi!.
@kylejohnmorris
kyle morris
22 days
5 days until the SF Democratize Intelligence summit, backed by @cyberFund_!. Join hundreds of the world's most brilliant researchers like @edwardjhu, founders like @eshear , engineers like @trevormccrt1, and policymakers like @IzzieHahn in the same room to create an open and.
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@MatternJustus
Justus Mattern
18 days
excited about the training run I'm starting today.
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@MatternJustus
Justus Mattern
20 days
I'm especially looking forward to Deepseek-R1-0528 distilled models that can be trained using SYNTHETIC-2. The distilled model based on Qwen 8B that is out already outperforms Qwen3-32B without any RL (at least on benchmarks), which is quite impressive
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@PrimeIntellect
Prime Intellect
21 days
Launching SYNTHETIC-2: our next-gen open reasoning dataset and planetary-scale synthetic data generation run. Powered by our P2P inference stack and DeepSeek-R1-0528, it verifies traces for the hardest RL tasks. Contribute towards AGI via open, permissionless compute.
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@MatternJustus
Justus Mattern
21 days
RT @khoomeik: there is no excuse for any gpu on earth to be idling right now. every idle gpu can and should contribute to generating high q….
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@MatternJustus
Justus Mattern
21 days
If you want to read more, check out our blog post - we’ll also share more about the data curation pipeline soon!.
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