If you have more info indicating LLMs are used here please share
two seconds of research would reveal LLMs are ALL OVER COMPUTER VISION. Are convolutional networks used? Yes. Are LLMs used? Yes. And MLLMs.
Tell you what sparky: you find me a source that says ONLY CNNs are used, then you can act like a subject matter expert.
https://arxiv.org/abs/2311.16673
https://github.com/OpenGVLab/VisionLLM
https://www.chooch.com/blog/how-to-integrate-large-language-models-with-computer-vision/