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Runway develops generative video tools and research systems.
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Its Gen-1 and Gen-2 products are historical model generations; Runway’s current research also describes general world models for interactive environment simulation.
Runway introduced Gen-1 for video-to-video and Gen-2 for text-to-video/image-to-video tasks. Its archived Motion Brush feature gave localized motion control but was specific to Gen-2, which Runway deprecated in 2025. Runway’s general world-model research describes a distinct goal: represent environments and simulate future events, with GWM Worlds 2 conditioned on prompts, current controls and prior frames. Research claims are scoped to the methods and evaluations described by Runway.
Gen-1 was described as video-to-video transformation using text or image guidance.
Gen-2 was introduced for text-to-video and image-to-video generation; its legacy Motion Brush feature is now deprecated.
Motion Brush historically let users indicate regions and directions for motion in Gen-2 clips.
Runway’s GWM research studies interactive world simulation, including autoregressive frame generation with contextual inputs.
When describing Runway, date product generations and check current support status. Distinguish creative video generation from interactive world-model research, and assess any real-world simulation claims against published evaluation. The cited research does not establish that generated environments are physically faithful in every setting.
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Runway develops generative video tools and research systems. Its Gen-1 and Gen-2 products are historical model generations; Runway’s current research also describes general world models for interactive environment simulation.
Runway crea herramientas de video generativo, incluidos sus modelos de texto a video y de video a video de la serie Gen.
Gen-1 manejó video a video, mientras que Gen-2 introdujo la generación de video directamente a partir de indicaciones de texto en 2023.
Los modelos de vídeo deben hacer que los fotogramas sean consistentes a lo largo del tiempo para que los objetos se muevan suavemente en lugar de parpadear, un problema que las imágenes no tienen.
Runway’s support page says Motion Brush was a Gen-2-specific feature and is not available on newer models; the page describes product status, not the feature’s historical behavior.
Runway described Motion Brush as a way to paint regions and specify movement for those areas in Gen-2 image-to-video generation.
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