ERNIE 4.5 VL 28B A3B PT is a Chinese-developed vision-language model that processes both text and images, with a sparse mixture-of-experts architecture activating only 3B parameters per forward pass despite its 28B total size. This makes it computationally lean relative to its parameter count. Its pretraining roots mean it sits closer to a base model, requiring further fine-tuning for polished instruction-following behavior.