Starlight Fast 2

2x faster diffusion upscaling with higher fidelity

Model Overview

Starlight Fast 2 is a second generation diffusion-based video enhancement model designed for improved speed and quality. It delivers significantly faster results than Fast 1 while producing more realistic outputs and sharper details.

Fast 2 balances performance and quality, making it well suited for high volume processing, rapid turnaround workflows, and scenarios where speed is critical but visual fidelity still matters.

Key Capabilities

• Up to 2× faster performance compared to Starlight Fast 1

• Produces more realistic results and sharper detail than previous model

• Ideal for high volume and time sensitive workflows that require speed with improved quality

Pricing

Frames Per Credit — 1080p	Frames Per Credit — 4k
~52	~24

For more accurate estimates we recommend checking out our Credit Calculator.

Getting Started

Endpoint

• https://api.topazlabs.com/video/

  • model — "slf-2"

Model-Specific Parameters

• input_frame_count — integer, optional; maximum 9000

• start_idx — integer, default 0

• end_idx — decimal, default 1000000.0

• upscaling_factor — decimal, default 1.0

• low_sharpness — boolean, default false

• keep_original — boolean, default false

• ffmpeg_encoding — string, optional

• wm_path — string, optional

• ffmpeg_preproc_filters — string, default ""

Examples

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