Xing4.0 29B A4B is a sparse mixture-of-experts style model from XingChen-AGI, activating around 4 billion parameters per forward pass despite its 29 billion total parameter count — meaning it aims to deliver capable text reasoning at a lower computational cost than its full size suggests. It handles an unusually large context window of 262,144 tokens, making it suited for long-document tasks. Specific capability details beyond its architecture are limited.