Flan-UL2 is an encoder-decoder model that elevates the powerful T5 architecture to new heights. With its impressive 2048 receptive field, Flan-UL2 conquers few-shot in-context learning challenges. By shedding cumbersome mode switch tokens, it delivers a streamlined, user-friendly experience. A part of the groundbreaking Flan2 series, this model skillfully utilizes instruction-based fine-tuning to master diverse academic tasks.