Jim Fan (@DrJimFan)

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:

My morning ritual: coffee, then watch our robot assemble stuff. The model isn't fast, but it measures every grasp, obsesses over every alignment, and handles every piece like an heirloom. Watching is therapeutic, even meditative. Simple pleasure from the execution of a task well done. Uncut, no speedup, end-to-end policy in one go.

2024: AI is the copilot 2025+: humans are the copilot Copilot is the new engineering skill. It’s not easy to leave the driver seat - we must learn to think the AI way and adapt to the alien workflows. Help AI help ourselves.

How to build *TruthGPT*? I listened to a talk by the legendary @johnschulman2. It's densely packed with lots of deep insight. Key takeaways: - Supervised finetuning (or behavior cloning) makes the model prone to hallucination, while RL mitigates it. - NLP is far from done! 1/🧵