# Runway updates Gen-4.5 model; launches negativePrompt, Seedream 5.0 Lite API

> Runway has pushed out a substantial update to its video generation platform, and the theme is control rather than raw novelty. The July 10 release adds an optional negativePrompt parameter to its Veo3 and Veo3.1 models, letting creators specify what they do not want to appear, up to a thousand characters, which is one of the more requested levers for taming unpredictable AI video. The update also broadens the model lineup available through Runway's API. Seedream 5.0 Lite generates images from text and can fuse multiple reference images, Seedance 2.0 Fast produces short clips from text, image, or video with keyframe control, and Aleph 2.0 edits existing footage from 2 to 30 seconds using prompts and up to five keyframe images. Taken together, the changes read as Runway positioning itself as connective tissue for AI video, offering a menu of third party and in house models behind one interface. As larger labs consolidate the generation market, a platform that gives working creators fine grained editing and negative prompting, rather than just a single flashy model, is a meaningful bet on the people actually shipping content.

_Section: [Daily AI Updates](https://www.wortins.com/daily-ai) · Source: Runway Research · Published Thursday, July 23, 2026_

## Wortins' read

Runway has pushed out a substantial update to its video generation platform, and the theme is control rather than raw novelty. The July 10 release adds an optional negativePrompt parameter to its Veo3 and Veo3.1 models, letting creators specify what they do not want to appear, up to a thousand characters, which is one of the more requested levers for taming unpredictable AI video. The update also broadens the model lineup available through Runway's API. Seedream 5.0 Lite generates images from text and can fuse multiple reference images, Seedance 2.0 Fast produces short clips from text, image, or video with keyframe control, and Aleph 2.0 edits existing footage from 2 to 30 seconds using prompts and up to five keyframe images. Taken together, the changes read as Runway positioning itself as connective tissue for AI video, offering a menu of third party and in house models behind one interface. As larger labs consolidate the generation market, a platform that gives working creators fine grained editing and negative prompting, rather than just a single flashy model, is a meaningful bet on the people actually shipping content.

## Source

[Read the full story at Runway Research](https://runwayml.com/research/introducing-runway-gen-4-5)

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