A vision-language model from Apple that operates at a patch-level granularity, processing images in 14x14 pixel patches at 224px resolution. It uses a LiT (Locked image Tuning) training approach, where the image encoder is frozen and only the text side is trained — a deliberate architectural choice that prioritizes stable visual representations. It handles text input and output, suggesting it's oriented toward image-text alignment tasks rather than open-ended generation.