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OUI-1 Is a 26B/4B-Active Model Fine-Tuned to Emit Interfaces, Not JSON, and It Runs on One RTX 5090 in 1.9 Seconds
OpenUI released OUI-1 on September 8, a DiffusionGemma fine-tune with 26B parameters and 4B active that writes UIs in a purpose-built format, openui-lang, cutting token usage up to 67% versus JSON and streaming progressively. It scores 71.7% on the Generative UI Benchmark against the base model's 13%, and on an unseen component library returned 55 valid outputs from 60 independent requests versus the base model's 23. Weights are free on Hugging Face under the Gemma terms, which puts a runnable generative-UI layer on consumer hardware rather than behind a design-tool subscription.
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