Runway Gen-4.5

Published

Dec 1, 2025

Runway Gen-4.5 is an AI model developed by Runway (United States), first published in December 2025. It works in the video domain, on tasks such as video generation.

Epoch AI has no training-compute estimate for this model.

Access: Hosted access (no API). Its weights are not openly released. Epoch AI rates the confidence of this record as likely.

Full record

Organization: Runway
Country of organization: United States
Domain: Video
Task: Video generation
Model accessibility: Hosted access (no API)
Open weights: No
Epoch confidence: Likely