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Video Generation Model

Gen-4.5

Video by Runway

PublisherRunway
TypeVideo
Context Window1,000 tokens
ReleasedDecember 2025
Price$0.12/second
TEXT TO VIDEOIMAGE TO VIDEOFLAGSHIP

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Documentation & links

Parameters & options

Max Temperature1
ModeSelect
Default: text-to-video
Text to VideoImage to Video
First FrameImage URLimage-to-video only

The image the video starts from.

Duration (seconds)Number
Default: 5Range: 2–10
Aspect RatioSelecttext-to-video only
Default: 1280:720
1280:720 (Landscape)720:1280 (Portrait)
Aspect RatioSelectimage-to-video only
Default: 1280:720
1280:720 (Landscape)720:1280 (Portrait)1104:832832:1104960:960 (Square)1584:672
SeedSeed
Range: 0–2147483647

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