How long can Sora videos be?
While Sora was live, most clips were short: the Sora 2 app made about 10-second videos, extendable up to roughly 25 seconds. The original December 2024 Sora on the web could reach 20 seconds. The API used fixed 4-, 8-, or 12-second lengths. Note: the consumer app shut down April 26, 2026.
Why — the first-principles explanation
Sora's length limits came down to compute cost and coherence. Every extra second of video multiplies the number of frames the model must generate and keep visually consistent, and errors compound over time — a face or background can drift the longer a clip runs. So OpenAI capped durations to keep quality high and costs manageable.
Different Sora versions had different caps. The original web Sora (December 2024) topped out around 20 seconds for Pro users. The Sora 2 app (September 2025) centered on quick, shareable clips of about 10 seconds, with the ability to extend toward roughly 25 seconds. The developer API offered fixed choices of 4, 8, or 12 seconds so the cost per generation was predictable.
These caps also reflected the product's purpose. The Sora app was a TikTok-style feed built for short, snackable videos, not full films. Longer, higher-resolution output was reserved for the paid Sora 2 Pro tier. All of this is now historical for everyday users: OpenAI discontinued the Sora app and website on April 26, 2026, leaving only the API, which itself ends September 24, 2026.
An example that makes it click
Think of Sora like a Polaroid camera for video. Each 'photo' takes real effort to develop, and the longer the shot, the more can go wrong — like a hand-drawn flipbook where by page 300 the character's shirt has slowly changed color. So OpenAI kept the clips short, about 10 seconds, roughly the length of a vine or a quick TikTok, so every frame stayed sharp and on-model.
Key facts
- Sora 2 app clips were about 10 seconds, extendable to roughly 25 seconds.
- The original web Sora (Dec 2024) supported up to 20 seconds for Pro users.
- The Sora API offered fixed durations of 4, 8, or 12 seconds.
- Longer, higher-resolution output was a Sora 2 Pro (ChatGPT Pro) feature.
- The consumer app and web shut down April 26, 2026; the API ends September 24, 2026.
OpenAI's text-to-video model for short cinematic clips.
Affiliate link — we may earn a commission at no cost to you.▶ The 60-second explainer (script)
How long could Sora videos be? Shorter than you might think. The Sora 2 app made clips of about 10 seconds, and you could extend them to around 25 seconds. The older web version from December 2024 went up to 20 seconds for Pro users, and the developer API used fixed lengths of 4, 8, or 12 seconds. Why so short? Because every extra second of AI video takes a huge amount of computing power, and the longer a clip runs, the more likely details start to drift and look wrong. Sora was really built for quick, shareable videos, not full movies. One important note: OpenAI shut down the Sora app and website on April 26, 2026, so these limits are now history for everyday users.
What authoritative sources say
People also ask
Could Sora make a full-length movie?
No. Clips maxed out around 20 to 25 seconds; Sora was designed for short videos, not long films.
Why were Sora videos so short?
Longer video costs far more compute and is harder to keep visually consistent, so OpenAI capped durations.
Could you extend a Sora clip?
Yes. In the Sora 2 app you could extend a clip, reaching roughly 25 seconds total.
Can I make long clips now?
Not with Sora. The consumer app closed April 26, 2026; consider tools like Google Veo or Runway.