Depending on what you mean, im not super into it, but i hear persyn.ai is good, or just Gemini, their new version of nano banana is crazy for image generation, aswell as their VEO 3.1 model for videos, and there is a chinese one which i completely forgot the name of that requires a chinese number to sign up to. but for generous free tiers id go Nano Banana for the image generation and VEO 3.1 for the video generation.