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Real-Time Long Video Generation (Highest Quality Variant)

Most AI video tools either top out at a few seconds or need an expensive multi-GPU cluster to go longer — and quality drifts the moment a clip runs long. Helios-Base is the flagship, highest-quality member of the Helios family: it generates long-form video (up to ~45 seconds) from a text description, a starting image, or an existing clip, and it does it in real time on a single GPU at 19.5 FPS. When output quality is the priority, this is the variant to reach for. Built by PKU-YuanGroup.

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What it does

Helios-Base is the flagship, highest-quality variant of the Helios video generation model family, developed by PKU-YuanGroup. It generates long-form, visually rich video content from a text description, a reference image, or an existing video clip. While the distilled version of Helios prioritizes speed, Helios-Base is the go-to choice when output quality is the top priority, producing the most detailed, coherent, and visually polished results in the family. It still runs on a single GPU and generates video in real time at 19.5 FPS, making it both high-quality and cost-effective compared to larger competing models.

Problem it solves

• Best-in-class output – Among the three Helios variants, Base delivers the highest visual fidelity, making it the right choice for premium creative and production use cases
• Cost-effective infrastructure – Runs on a single GPU rather than expensive multi-GPU server clusters, significantly reducing compute costs
• Flexible creative input – Works from a text description alone, a starting image, or an existing video clip, fitting a wide range of creative and production workflows
• Temporal coherence – Videos remain visually consistent and coherent throughout their full length, without the common "drift" or quality degradation seen in longer AI-generated clips
• Production-ready deployment – Designed to integrate into existing production pipelines and tools from day one

Input/Output

• Input:

  • Text to Video: Describe the scene you want in plain language and Helios generates the video

    

  • Image to Video: Provide a starting image and a description of the motion or scene

  • Video to Video: Provide an existing video clip and a description to transform or extend it

• Output: A fully generated MP4 video file

  • Up to ~45 seconds in length

  • High visual quality with smooth, coherent motion throughout

    

    55b41170-4bdf-4b41-aeb1-3743732256d1.mp4

Accuracy & Speed

• Speed & Scale

Helios Model Variants

Note: Image-to-Video and Video-to-Video modes may produce slightly less consistent results than Text-to-Video, as the model was primarily trained on text-based generation.

• Technical Details