Sora 2 API for realistic video with sound

The Sora 2 API is OpenAI's video generation API that turns text prompts into short video clips and can produce synchronized audio. It supports an asynchronous workflow: you submit a request, then fetch the finished video when it completes. The API is accessed through EvoLink, which routes requests to OpenAI while you manage keys and usage in one place. It follows OpenAI safety policies, so avoid real people and copyrighted characters. Use it for ads, product demos, and visual explanations where believable motion and consistent style matter.

OpenAI lists specific size options for the Sora 2 API. For sora-2, the listed sizes are 720x1280 and 1280x720. For sora-2-pro, the listed sizes include 720x1280, 1280x720, 1024x1792, and 1792x1024. These cover vertical and horizontal formats for mobile and desktop use. You choose size in the API request. If you provide an input_reference image, match the image resolution to the selected size to avoid stretching. If you need other aspect ratios, you may need to crop or pad in post. Always confirm supported sizes in the latest OpenAI docs before building templates.

The API reference lists two model options: sora-2 and sora-2-pro, and both use the same Sora 2 API workflow. OpenAI describes Sora 2 Pro as a higher quality option in the Sora app, so it can be a good choice when you need the best fidelity. Sora 2 is the default model for general use and quick iteration. The practical way to decide is to run a small batch of prompts on both models and compare visual quality and timing for your target use case.

OpenAI's Sora 2 system card highlights synchronized dialogue and sound effects, which means the Sora 2 API can output video with audio that matches what happens on screen. In practice, the exact audio quality depends on the prompt and the scene you describe. Some teams still add music or voiceover in post for branding, but Sora 2 provides a strong base track for timing and ambience. Audio behavior can change as the model and API evolve, so review the latest docs. Check your outputs and keep safety policies in mind.

The video generation guide lists API guardrails: only content suitable for audiences under 18, copyrighted characters and copyrighted music are rejected, real people (including public figures) cannot be generated, and input images with human faces are rejected. OpenAI usage policies also prohibit impersonation or harassment and require consent to depict real individuals. Build prompts and reference assets with these rules in mind, and review the latest policy updates before you ship. Review updates regularly. If your use case involves real people or branded IP, you should not use the Sora 2 API for that content.

Yes. The video generation guide supports an input_reference image file that becomes the first frame of your video. Include it in the POST /videos request, and make sure the image resolution matches the target size. Supported formats are image/jpeg, image/png, and image/webp. This is useful for anchoring brand assets or a specific environment so subsequent frames stay consistent. If your workflow needs strict layout control, start with a clean reference image and keep prompts aligned with it.

Generation time depends on model choice, seconds requested, size, and current queue load. The Sora 2 API is asynchronous: you submit a request, then poll for completion before downloading the result. For production, build in retries and timeouts, and surface progress in your UI. If you need a predictable SLA, test typical prompts during your expected traffic windows and track average completion times. EvoLink simply routes the request, so timing is driven by OpenAI capacity. This is also why shorter clips are a common starting point for iteration.

Usage rights for Sora 2 API outputs follow OpenAI's terms and policies, which can vary by plan and region. EvoLink does not change those terms; it simply routes requests. Before using outputs commercially, review the latest OpenAI usage policies, content policy, and any platform-specific rules that apply to your industry. If you are producing client work, document your prompts and outputs for auditability and keep a record of the policy version you relied on. When in doubt, consult legal counsel for licensing questions.