Runway has announced its first "Interface World Model" Solaris: the system no longer calls pre-written web or application code, but generates the next state of an interactive interface frame by frame in real-time after user actions such as clicking and dragging; Runway positions this as an operating system capability that generates applications and websites during use.

Solaris treats the visual display itself as the application: a single world model simultaneously handles rendering and user interaction without going through DOM, CSS, JavaScript, or other intermediary code representations. Every frame seen by the user is both an interface and an interaction state; this means the interface does not need to be fixedly constructed by engineers first and then changed through subsequent version updates.

The system is based on the transformation of Runway's Gen-4.5 video generation model and continues the path of the GWM-1 general world model released in December 2025. The model has been adjusted to understand interactive inputs, generate images sequentially in an autoregressive manner, and reduce the generation steps required for real-time inference through step distillation and self-training.

Runway states that the development goals for Solaris include real-time interaction, consistency across complete sessions, and 720p visual quality. In its disclosed user research, 250 participants completed nearly 7,500 pairs of comparisons; Solaris outperformed the code-generated Claude Opus 5 interface with a 61% success rate in instruction compliance comparisons and a 71% success rate in natural interaction comparisons. These results were conducted by Runway itself and have not been independently verified.

Runway also used GPT-4o, Gemini 2.5 Pro, and Fable 5 as control objects in reconstruction tasks, employing SSIM and DINOv3 visual similarity metrics, claiming that Solaris outperforms leading large language models in structural similarity and information retention. The company has not yet disclosed complete benchmark details, model weights, source code, or API.

In terms of market mechanisms, Runway aims to shift the software value chain from "developers writing functions - front-end displaying functions" to "models synthesizing interfaces on demand." If this path holds, inference computing power, world models, and high-quality interaction data will become the main beneficiaries; traditional front-end development, templated SaaS interfaces, and low-complexity design delivery will face price pressure. However, at this stage, buyers are still constrained by accuracy, auditability, and accessibility compliance, and critical enterprise processes cannot solely rely on visually generated interfaces.

Solaris is still in the early research and partner testing phase, and Runway has only opened early access applications. Disclosed limitations include insufficient text stability, potential inaccuracies in interface content, long-session consistency issues, and incomplete support for APIs relied upon by accessibility technologies such as screen readers.

Source: Public Information