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Runway shows Project Continuum, extending Solaris to full computer interaction
Vercel Labs
2026-09-19 05:15:12

Chris Tate tests Jev with json-render to assemble app interfaces at runtime

BlockBeats reported that Vercel Labs engineer Chris Tate has connected Jev to json-render and started testing a different way to build application interfaces: letting AI assemble UI at runtime instead of writing the full structure out token by token. In this setup, json-render prepares buttons, cards, input fields, data, and actions in advance. Jev then decides which components to use, how to order them, and where to place them, while a standard UI renderer handles the final rendering. The report said the system first makes one decision to choose the main components for a new interface, and, when needed, uses a second decision to arrange the layout. In a demo that generated the same train-ticket interface, the default JSONL mode took 3.21 seconds from request to completion, while Jev finished in 0.88 seconds. BlockBeats said the full generation time in the demo was pushed below one second, giving this style of interaction a real-time feel. The article also compared Jev with Solaris, a product released by Runway late last month. According to the report, Solaris pursues a similar direction through a more aggressive approach, using a world model to generate the entire interface frame by frame and bypassing traditional code and components. Jev, by contrast, still relies on components and actions written in advance by developers and only changes how they are combined at runtime.

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Chris Tate tests Jev with json-render to assemble app interfaces at runtime
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