Best AI Video Generation APIs in 2026: Sora, Veo, Runway, Kling & Luma
AI video crossed the quality line in 2026 — and it is now an API call, billed by the second. Whether you need cinematic b-roll, talking-avatar explainers, or product clips at scale, this guide shows you the top video generation APIs, what each is best at, and the real per-second cost.