Does the fast variant support all the same reference types as the pro variant?

Yes. All reference types are supported: @image1–@image9, @audio1–@audio3, @character: , and @omni-character: . The only difference is generation speed and cost.

When should I use fast vs. pro VIP?

Use the fast variant for high-volume workflows, prototyping, or cost-sensitive production. Use the pro variant when maximum output quality is required.

Omni Reference VIP Fast: AI Image-to-Video Generator