Artificial Intelligence #x-tokenizer#multimodal
X-Tokenizer: Semantic Action Tokenizer Boosts Robot Control by 13.5% Over FAST
Researchers propose X-Tokenizer, a new action tokenizer that treats tokenization as semantic interface learning rather than mere compression. Using a lightweight encoder-Semantic Residual Quantization (SRQ)-decoder architecture, it improves multimodal grounding by 13.5% and long-horizon task performance by 8.25 points over existing methods like FAST.
Jun 16, 2026 1 source