The BEST AI for 4K images. Free & fast
AI Search showed 5 AI tools in this video on . 5 are verified available in the EU. Each row below jumps to the exact second. Part of week 2026-23.
Tools shown in this video, with timestamps
Open-source Nvidia pixel-space diffusion model that upscales 1K images to 4K (or 512 to 2K) in seconds, running in ComfyUI. Creator shows upscaling demos, claims it is up to 5.9x faster than SeedVR2 with better detail, and walks through install and three workflows including a weak 1K text-to-image mode.
Live demoPrevious leading upscaler used as the comparison baseline. PiD was shown to be sharper, more faithful and much faster, while SeedVR2 was slow and produced blurry edges and artifacts.
Popular node-based platform for running open-source image and video models locally. Used to run the PiD workflows, with a note to update to the latest version first.
Live demoText encoder required by the PiD workflows, available in FP16 (5.2 GB) and FP8 (2.6 GB) versions.
Live demoFast image generator used as the first stage in the Z Image to PiD workflow, with 7-9 steps recommended. Its output is then upscaled to 4K by PiD, with Qwen3 4B as its text encoder.
Live demo