Runway is a professional AI video toolkit: Gen-4 video generation, camera controls (Motion Brush, Director Mode) and editing tools (Green Screen, Inpainting) in one platform, widely regarded as the most complete commercial AI video suite.
Free: 125 credits (Gen-3 Alpha only). Standard ~$12/mo (625 credits), Pro $35/mo (2,250 credits, 4K export, Gen-4 access), Max (replaced Unlimited) with a larger credit pool, Enterprise custom. Gen-4.5 costs 12 credits/second.
Video and motion designers who need professional camera control and post-generation editing (not merely a single-shot text-to-video clip), and are willing to pay for Pro-tier Gen-4 access.
Free and Standard tiers can't access Gen-4: if the quality jump to Gen-4 matters for the project, budget for at least the Pro plan rather than expecting it on a lower tier.