Sora vs Runway vs Veo: Flagship AI Video Compared (2026)

Sora was OpenAI's physics-aware text-to-video model, publicly launched in late 2024 to enormous anticipation. Sora 2 delivered up to one-minute clips with strong subject consistency and cinematic prompt fidelity that no competing model matched at launch, and it set the technical benchmark every subsequent competitor — Veo, Kling, Runway, Luma — has been building toward since. The product never solved its economics: estimated inference costs reached roughly $15 million per day at peak against lifetime revenue of about $2.1 million, and active users declined 75% from peak before OpenAI announced the shutdown in March 2026. The web and mobile apps were discontinued April 26, 2026; the API fully shuts down September 24, 2026, after which all account data is permanently deleted. It's included in this comparison for historical context — Sora's legacy is the bar it set, not a tool you can use today.

Runway remains one of the most mature, professionally-oriented AI video platforms in active operation, with Motion Brush for painting motion vectors onto specific frame regions, Director Mode for precise camera direction, and Act-One for transferring facial performances onto AI characters. Unlike Sora, it has a sustainable, actively developed business with a mature production API used by agencies and studios. It has no native audio synthesis at all, unlike Veo, and raw photorealistic quality from a text prompt trails both Veo 3.1 and Kling 3.0 — Runway's edge is precision and editing control, not the highest ceiling on prompt-to-pixel realism. For working creatives who need directed, controllable output and a platform that will still exist next year, it's a safer and more capable bet than Sora ever was.

Veo, from Google DeepMind, is the most fully-featured AI video model for content creators still standing after Sora's exit: where Runway and most competitors output silent footage, Veo 3.1 generates synchronized dialogue, ambient sound, and sound effects in the same model pass as the video — no separate audio pipeline needed. It outputs true 4K at 24fps, natively composes for both 16:9 and 9:16 (a real advantage for social/vertical formats), and is available free with 10 clips/month via Google Vids, no credit card required. The base clip length is a short 8 seconds, requiring chaining for longer sequences, and prompt adherence on complex multi-element scenes trails Runway's Gen-4.5. For social video, YouTube b-roll, and any use case where a finished, audio-complete clip is the deliverable, it's the strongest and cheapest option of the two survivors here.