Sora 2 vs Veo 3.1 vs Kling vs Wan: Which AI Video Model Should You Use?

Update, September 29, 2026: OpenAI discontinued Sora. The Sora app closed on April 26, 2026 and the Sora API stopped on September 24, 2026, so Sora 2 can no longer generate video on Pixraft or anywhere else. The Sora 2 notes below are kept for reference. For synchronized audio, test Veo 3.1 and the other native-audio models instead, and see our Sora alternative guide.

Quick answer

Do not choose a model from a leaderboard alone. Choose based on the shot: controlled cinematic motion, native audio, reference-image animation, character consistency, short-form speed, or the ability to test several model families inside one workflow.

Veo 3.1 is especially relevant when synchronized audio, realism, and prompt-directed scenes are central to the brief (Sora 2 was too, until OpenAI discontinued it). Kling and Wan remain important options when creators want different motion styles, image-to-video behavior, or provider availability. The exact result depends on the model variant and inputs.

What should you test?

Use a small test set rather than one showcase prompt:
1. A human walking with a clear camera move.
2. A product rotating without shape drift.
3. A two-beat action with a beginning and ending state.
4. A short dialogue or sound-design prompt when native audio matters.
5. An image-to-video shot with a reference frame.

Record the model variant, prompt, input image, duration, resolution, successful take, retry count, and cost. A model comparison without the test conditions is only an opinion.

Sora 2 (discontinued)

OpenAI shut down the Sora API on September 24, 2026; this section is kept for reference. OpenAI described Sora 2 as a video model with synchronized audio. It is a strong candidate for scenes where motion, dialogue, and sound need to be considered together.

Choose it when:
- The brief needs a directed scene with audio in the same creative pass.
- The shot includes dialogue, ambient sound, or sound effects.
- You are willing to test the exact duration and output settings available to your workflow.

Check the current model documentation and pricing before promising a specific duration or cost.

Veo 3.1

Google DeepMind presents Veo 3.1 as a video model focused on realism, physics, prompt adherence, creative control, and native audio capabilities.

Choose it when:
- Real-world physics and environmental detail matter.
- Reference images or style references are part of the shot design.
- You need to test video and audio together.

The right comparison is not “Veo always wins.” It is whether its strengths match the failure modes your project cannot tolerate.

Kling and Wan

Kling and Wan model families cover a broad set of image-to-video and text-to-video workflows. Variant names and availability change, so treat them as families rather than one fixed model.

They are useful candidates when:
- You want to compare motion behavior across several providers.
- The project starts from a still image.
- You need an alternative when a preferred model is unavailable or too expensive for the shot.

Use the live model catalog and the selected model’s schema before generating. “Kling” or “Wan” alone is not enough information for a reproducible test.

At-a-glance decision table

How to run a fair comparison

• Use the same source image for image-to-video tests.
• Keep prompt length and structure comparable.
• Separate model quality from output resolution and duration.
• Count successful usable takes, not only the best frame.
• Record generation cost and retries.
• Publish the test date and model variant.

This is the difference between a useful buyer’s guide and a list of marketing adjectives.