Sunday Robotics ACT-2 achieves zero-shot generalization breakthrough

tonyzzhao · x · 2026-08-22

Sunday Robotics' ACT-2 model demonstrates that reliability gains from in-house post-training can transfer zero-shot to new environments. While robotic models often fail when conditions change, ACT-2 closes this generalization gap by scaling high-quality pre-training with diverse human demonstration data. It achieved over 99.1% zero-shot success on laundry folding across unseen homes and garments.

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