FLUX Upscale Adds Native 2K and 4K Video Upscaling via Dedicated Endpoint

FLUX by Black Forest Labs now includes FLUX Upscale for video, a dedicated tool and API endpoint that regenerates input video clips at native 2K and 4K resolutions. The update expands the FLUX ecosystem beyond still image generation into video post-production, allowing creators to upscale low-resolution generations or legacy footage without heavy artifacting.

What's new

Black Forest Labs has made FLUX Upscale accessible both as a standalone interface tool and through a developer API endpoint. Rather than applying traditional spatial interpolation or simple pixel smoothing, FLUX Upscale uses diffusion-based regeneration to infer and add high-frequency textures, sharp edges, and detailed grain across every frame.

Key capabilities of the release include:

• Resolution scaling up to native 4K output from lower-resolution video sources.
• Intermediate 2K export options tailored for faster rendering and lighter bandwidth requirements.
• API availability for pipeline integration, allowing studio workflows to automate batch upscaling.
• Temporal consistency controls designed to minimize flicker and warping between frames during the diffusion upscaling process.

How it fits your workflow

For visual effects artists, video editors, and AI creators, low native output resolution remains a key bottleneck in generative workflows. Early renders from models like Runway Gen-2, Luma Dream Machine, or initial Kling outputs frequently top out at 720p or low 1080p. FLUX Upscale gives editors a clear path to take raw generative assets and upscale them to broadcast and theatrical 2K or 4K standards.

Compared to dedicated video enhancement software like Topaz Video AI, FLUX Upscale relies on generative diffusion rather than standard frame restoration filters. While Topaz works exceptionally well on noisy live-action camera footage, FLUX Upscale synthesizes realistic missing detail on low-bitrate or overly smooth AI-generated renders. Compared to Magnific AI, which specializes in ultra-detailed still image enhancement, FLUX's video endpoint specifically targets temporal coherence across moving frames.

What it costs / how to try it

FLUX Upscale is available directly on the Black Forest Labs web platform and as a dedicated REST API endpoint for developers. Usage is billed per generation based on output resolution and total clip duration.