Short answer
As of November 9, 2026, you can’t generate new videos with OpenAI Sora: OpenAI discontinued the Sora web and app experiences on April 26, 2026, and discontinued the Sora API on September 24, 2026. (help.openai.com)
Before shutdown, the answer depended on which Sora product you meant. OpenAI’s Sora 2 API documentation listed clip durations of 4, 8, 12, 16, or 20 seconds (4 seconds by default); the maximum for one documented API generation was 20 seconds. OpenAI’s Sora product announcement also described videos of up to 20 seconds. These are former limits, not currently usable Sora capabilities. (developers.openai.com)
One clip versus a longer video
A single generation and a longer video assembled from multiple clips are different things. A third-party project, Sora Extend, describes generating clips in sequence, using each clip’s final frame as context for the next, and joining the results. That describes the project’s approach—not a confirmed current OpenAI feature or a verified maximum total runtime. (help.openai.com)
A CometAPI article reports additional Sora stitching and extension limits, but its claims aren’t supported by direct OpenAI references in the captured article, and it contradicts itself about Sora’s availability. Those figures shouldn’t be treated as confirmed limits. (help.openai.com)
What this means for API selection
If you’re choosing a production video-generation API, don’t plan around Sora availability: OpenAI’s discontinuation notice says the API shut down on September 24, 2026. The historical 20-second maximum does not mean the API can still accept requests, and the available evidence here does not establish that TokenForge Cloud offers a Sora API. (help.openai.com)
Bottom line: Sora 2’s documented maximum was 20 seconds for one API generation, but Sora itself is discontinued. For a current production workflow, select a currently available provider and confirm its present duration limits in that provider’s documentation.
Sources
What to know about the Sora discontinuation — OpenAI Help Center