
Research Scientist @nvidia GEAR Prev @Tesla_Optimus, PhD @UCBerkeley Opinions are my own
San Francisco, CA
Joined February 2026
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Now you can use GR00T N1.7 and SONIC together to enable tasks that require TRUE whole-body coordination!! Including simultaneous precise hand and foot placement, like opening a trash can with the foot pedal and throwing an object inside!
Try it yourself, it is so fun!
Open-sourcing the whole package here!
The last piece of our SONIC open-source, data collection, gr00t VLA post-training, inference just hit the repo!
Train your Autonomous policies on G1 Whole-body with SONIC and gr00t N1.7!
🧑💻Code: github.com/NVlabs/GR00T-Whol…
📑Docs: nvlabs.github.io/GR00T-Whole…
Check out Jim’s deep dive on GR00T 2!
Introducing GR00T 2: our most advanced, open System One model for robotics. It runs entirely on your robot’s onboard compute, fully untethered, and you own every weight of it. GR00T 2 features:
1. Long-horizon tasks: dexterous manipulation and whole-body control chained over 20+ steps and 5+ minutes, such as performing chemistry lab experiments or assembling model airplanes end to end.
2. X-Adapt: adapting from easy data sources (human wearables and simulation) and deploying zero-shot to diverse real robots.
3. Unified Cognition: native integrations with frontier agents for advanced physical reasoning, robust error recovery, and safety monitoring.
It's an open-source buffet! We are releasing not only the model weights and X-Adapt recipes (coming December), but also our agentic framework, simulation engine, annotation engine, hardware design, and even training data (100K hours, that's ~11 yrs of experience), all available today!
Everything that moves will be autonomous. Anyone can become a roboticist.
Lock in, build with us!
Deep dive in thread:
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A full scale WAM that runs super fast!
Replying to @yukez
GR00T 2 Turbo, a faster version of GR00T 2, runs onboard a humanoid with NVIDIA Jetson Thor and drives its whole body as it walks, bends, reaches, and carries: serving popcorn, wiping up spills, clearing tables.
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Check out GR00T 2! It was incredible to see first hand how well it works for whole-body locomanipulation tasks. Truly feels like a step change. You’ll be able to try it yourself very soon, we will open source!
Meet GR00T 2, our new generation of world-action models (WAMs): it imagines how the physical world will unfold and generates the actions that get it there. One model runs on parallel grippers, dexterous hands, and humanoids.
research.nvidia.com/labs/gea…
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Fernando Castañeda retweeted
ASPIRE is now open-source!
Since our initial release, we've made exciting progress:
🤖 Real-world robot manipulation with GPT-6 Astra.
🔄 Continual skill refinement on physical robots.
📈 Saturated simulation benchmarks: 99% on LIBERO-Pro (80 tasks), 100% on Robosuite (7 representative tasks), and 100% on BEHAVIOR-1K (2 representative tasks).
Code: github.com/NVlabs/ASPIRE
Project: research.nvidia.com/labs/gea…
🧵 More results in the thread below.
We are open-sourcing V1.0 of our agentic robotics framework, ASPIRE, with full real robot skill discovery and self improvement capabilities! On the day Astra arrived, our lab switched the backend model and saturated all the benchmarks to ~99% over night.
And the frontier is already on the move:
- Opus 5.5 slightly edges out Astra on our robot simulation bench.
- Sonnet 5.5 hits the Pareto frontier of cost vs. robot capability, $12/task.
We first introduced ASPIRE and /robot skill library in June, way before the big models could reliably do robotics. A rising frontier tide lifts all boats, but Astra was a 0->1 tsunami on many tasks.
Now you can also feel the Physical Bitter Lesson at home like we did on that fateful day ;)
links in thread
Fernando Castañeda retweeted
We’ve uploaded a great SONIC checkpoint we’ve been using internally lately!
This release focuses on supporting finer-grained manipulation, with much better wrist precision for fine-grained tasks. It works especially well with PICO’s 5-sensor mode.
Next: Thor support, less overheating, and more GR00T + SONIC demos!
Fernando Castañeda retweeted
A large-scale motion tracking framework can convert teleoperation, video, text, and music cues into humanoid control signals for running, jumping, or throwing a cup in the trash.
Learn more in Science #Robotics: scim.ag/3TYYKlp
Fernando Castañeda retweeted
A new Science #Robotics study highlights how a super-scaled motion tracking model trained on more than 100 million frames of data enables natural, whole-body movements in humanoid robots. @yukez @zhengyiluo scim.ag/3TYYKlp
Fernando Castañeda retweeted
Congrats to NVIDIA GEAR! SONIC is an amazingly flexible and performant tool to handle humanoid whole body control. Humanoid VLAs and WAMs are not possible without this essential middle layer of control.
Congratulations to our NVIDIA Research team for SONIC being published in @ScienceMagazine. 🦾
Built by NVIDIA Robotics researchers and collaborators, SONIC demonstrates scaling motion tracking for natural, robust humanoid whole-body control.
Read the paper 📄 science.org/doi/10.1126/scir…
Fernando Castañeda retweeted
SONIC now runs on the @AGIBOTofficial X2.
In Ghost Trials with @UFBots we trained a SONIC policy for a new embodiment on the full @TheBonesStudio BONES-SEED dataset. Unitree G1 and Agibot X2 side by side — one dance, two different robots.
Thanks to amazing H100 GPU availability on @nebiusai: 32×H100 with InfiniBand on demand, no reservation, running uninterrupted for days.
Dreams become a reality when builders come together. @_patrickrose @emerson @vitl2907 @DhruvDiddi @pengchen_
GitHub Repo : github.com/meetsitaram/sonic…
Congratulations to our NVIDIA Research team for SONIC being published in @ScienceMagazine. 🦾
Built by NVIDIA Robotics researchers and collaborators, SONIC demonstrates scaling motion tracking for natural, robust humanoid whole-body control.
Read the paper 📄 science.org/doi/10.1126/scir…
Fernando Castañeda retweeted
Congratulations to our NVIDIA Research team for SONIC being published in @ScienceMagazine. 🦾
Built by NVIDIA Robotics researchers and collaborators, SONIC demonstrates scaling motion tracking for natural, robust humanoid whole-body control.
Read the paper 📄 science.org/doi/10.1126/scir…
SONIC is officially published in Science Robotics today and it made the Science front page.
We show the promise of scaling motion tracking toward natural, robust whole-body control for humanoid robots.
Huge thanks to the team, and more exciting work is on the way.
Paper: science.org/doi/10.1126/scir…
Code: nvlabs.github.io/GEAR-SONIC
SONIC is on Science Robotics and featured at the top of the science.org website! 🎉🎉
New in @ScienceMagazine 🎉
Really excited to share that SONIC is now published in Science Robotics!
SONIC formulates super-scaling motion tracking as the foundational task for more natural and robust whole-body control. Our learned tracker and latent space further support foundation models like VLA/WAM training.
Huge thanks to the team and collaborators who made this happen.
science.org/doi/10.1126/scir…
New checkpoints coming in today!
#ScienceResearch #ScienceRoboticsResearch
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Today, we enable AutoResearch in the physical world for the first time! Introducing ENPIRE: we give 8 Codex agents a fleet of robots, an allocation of GPUs, and generous token budget. We set them free with a simple goal: solve the task as quickly as possible, keep the robots busy but stay safe, don't waste precious compute. Make no mistake.
Then humans step aside and our watch begins. The robot fleet starts to come alive: they learn to look for visual clues, reset the scene, practice novel skills, tinker with control stack, read papers online, debate, reflect, get stuck, and try again directly on the hardware. All we did is to give Codex an API to the world of atoms, and the rest is emergence.
ENPIRE is able to solve high-precision tasks like tying zip-ties, organizing fine pins, and installing GPUs all by itself. We also discovered a new type of "physical scaling": 8 robots exploring in parallel improves significantly faster than fewer ones.
A part of our NVIDIA GEAR lab now self-improves tirelessly over night. We just read the reports in the morning.
/goal: we all take a holiday and Jensen wouldn't even notice ;)
We will be open-sourcing everything, so you can host your self-running robot lab at home too! Deep dive in the thread:
NitroGen just won CVPR Best Paper Honorable Mention!! We are making strides towards general-purpose embodied agents that master not only the real world physics, but also all possible physics across a multiverse of simulations.
It’s been 4 years since MineDojo, our first embodied agent in Minecraft, won NeurIPS Best Paper. Congrats to everyone on the team!!
Exciting news on GR00T:
NVIDIA announces our first open humanoid robot platform, featuring Unitree H2 Plus and Sharpa hands, to accelerate academic research and facilitate cross-institutional collaboration.
R&D in humanoid robotics needs broader participation. Open science is how we build the future faster, together.
NVIDIA announces the first open humanoid robot reference design built for robotics research.
The NVIDIA Isaac GR00T Reference Humanoid Robot combines the @UnitreeRobotics H2 humanoid robot, @SharpaRobotics Wave five-fingered hands for dexterous manipulation, Jetson Thor onboard compute, and Isaac GR00T open software and models, giving researchers a full-stack platform from data capture to model deployment.
Read the #NVIDIAGTC Taipei announcement: nvda.ws/4ef9VOr
I promise this will be the best 20 min you spend today! Robotics: Endgame, the sequel to my last year's Sequoia AI Ascent talk, "Physical Turing Test". I laid out the roadmap for solving Physical AGI as a simple parallel to the LLM success story. Be a good scientist, copy homework ;)
And stay till the end, more easter eggs and predictions for your polymarket!
00:30 DGX-1 origin story at OpenAI, I was there in 2016 signing with Jensen and Elon. Heading to the Computer History Museum!
01:42 The Great Parallel
03:31 Robotics, the Endgame
03:39 Why VLAs fall short
04:32 Video world models as the 2nd pretraining paradigm
06:09 World Action Models (WAM)
07:46 Strategies for robot data collection and the FSD equivalent to physical data flywheel for robot manipulation
11:06 EgoScale and the Dexterity Scaling Law we discovered recently
14:00 Physical RL: bridging the last mile
15:39 DreamDojo: an end-to-end neural physics engine for scaling RL in silico
17:00 Civilizational Technology Tree and my predictions for the near future. Spoiler: it's closer than you think.
Thanks to my friends at Sequoia for inviting me back to AI Ascent this year! I had a blast! Last year's talk is attached in the thread if you missed it.
Fernando Castañeda retweeted
🚀 @Solo__Tech breakthrough: NVIDIA Sonic goes beyond the G1. 🌏
We’ve achieved a global first: migrating NVIDIA Sonic to a completely different humanoid morphology, the AGIBOT X2 🥇
This is a massive leap for transferable humanoid intelligence. We are moving away from single-robot controllers toward architectures that generalize across diverse embodiments.
The Specs:
Hardware: AGIBOT X2 Ultra (31 DoF)
Precision: 14-DoF Dexterous Hands
Capabilities:
- End-to-end whole-body locomotion with manipulation
- Single leg balancing and stylized motion
- Upper body gestures
Big respect to the team fueling this innovation all the way!
@meetsitaram @zeeshaan_7788 @Samarth_1506 @DevSodhi @flyingtaxiguy @build @frontiertower @nvidia @AGIBOTofficial @nebiusai @UFBots @vitl2907 @XeniaBulatov @NVIDIARobotics
To learn more about Solo Tech at the frontier of Physical AI: getsolo.tech/blog
#PhysicalAI #Robotics #Humanoids #NVIDIA #AGIBOT #SoloTech #EmbodiedAI #SoloSeven














