Best AI image upscaler models, compared

Upsampler's in-house creative upscaler powered by Flux. Adds plausible new detail at higher resolution rather than just enlarging existing pixels — the adjustable creativity slider lets you dial between faithful upscaling and aggressive detail enhancement. Built for AI-generated images, stylized work, and any upscale where the source benefits from a quality lift, not just a resolution lift. Only available on Upsampler.

Traditional GAN-based upscaling — fast, low-cost, and faithful to the source. Doesn't add invented detail like diffusion-based upscalers; preserves what's there at higher resolution. The pragmatic choice for high-volume batch upscaling where speed and credit cost matter more than aesthetic lift.

The larger variant of ByteDance's SeedVR2 with higher fidelity for archival-grade outputs. Same source-preserving philosophy as the standard model — no creative reinterpretation, no invented detail — just better recovery of fine texture and edge sharpness for hero archival pieces.

Pruna AI's optimized hyperrealistic image enhancer. Balanced speed-quality for general-purpose upscaling — a good middle ground between fast GAN-based options and slower premium diffusion upscalers. Strong for photorealistic content where you want a quality lift without the cost of SeedVR 2 Large.

Upsampler's custom Stable Diffusion-powered upscaler. Preserves the overall composition while regenerating fine detail — good for upscaling that should keep the source recognizable while filling in plausible texture and detail. A different aesthetic from the Flux upscaler; pick whichever style fits the source. Only available on Upsampler.