Article: Runway unveiled Solaris, a research-preview interface that generates live, interactive screens pixel-by-pixel without any underlying HTML, CSS, or code. In a user study, 61 % of participants said Solaris followed instructions better than traditional coded interfaces, and 71 % felt it behaved more naturally.

What Solaris actually does

Solaris isn’t a video-creation tool; it’s a real-time UI engine. When a user clicks or drags, a language model decides what should change, then a world model draws the next frame. The result is a functional interface that never relies on a markup or scripting layer—every visual update is produced on the fly by the AI.

How the system is built

Runway uses its Gen-4.5 video model, which already generates consecutive frames for video. Solaris repurposes that capability: each user interaction becomes a signal that guides the model to render the subsequent frame. The architecture splits responsibilities between two AI components:

  • Reasoning engine (language model): Interprets user actions and determines the logical changes needed.
  • Rendering engine (world model): Paints the visual outcome of those changes directly to the screen.

Because the model outputs raw pixels, there is no underlying HTML, CSS, or code.

Why it matters now

If an interface is generated instead of built, the value of software shifts toward a no-code internet. Runway’s move mirrors a pattern among AI firms: start with a core capability—text for OpenAI, image for Stability AI, video for Runway—and then expand into adjacent domains. By turning its video expertise into interactive UI generation, Runway is testing whether the next frontier of software is “code-free.”

The numbers behind the hype

Runway’s internal user study reports that participants preferred Solaris over conventional coded interfaces for two key criteria:

  • Instruction adherence: 61 % chose Solaris vs. 24 % for coded UI.
  • Natural behavior: 71 % chose Solaris vs. 21 % for coded UI.

Runway cautions that these figures come from its own testing, so external validation will be needed before the results can be taken as proof of superiority.

What to watch next

Runway has positioned Solaris as a research preview, so the feature set and pricing (if any) remain undefined. Key signals to monitor include:

  • Public beta availability: Wider user testing will reveal real-world performance and adoption hurdles.
  • Integration with existing platforms: Partnerships or plugins for popular design tools could accelerate uptake.
  • Competitive responses: Other AI labs may roll out similar “pixel-only” UI generators, sparking a race for the most responsive, controllable system.
  • Regulatory scrutiny: As AI-generated interfaces become more common, standards for accessibility and safety could emerge.

If Solaris proves viable, the line between software and content blurs further, nudging the internet toward a truly no-code era where the only requirement is a clear description of what you want to see. The next few months will show whether the promise of code-free interfaces can survive the practical demands of everyday users and enterprises.