Vidu Q4 vs Vidu Q3: Which Model Fits Your Next Video?

Consider Vidu Q4 Preview when your brief calls for 2K or 4K output, or when you want to explore its image and voice reference workflow. Keep Q3 in consideration when an existing Q3 setup already delivers the framing, sound and resolution your project needs.

Neither maximum duration nor native audio alone settles the choice. Both generations support clips up to 16 seconds and audio-video generation. A higher resolution setting also does not tell you whether a particular face, gesture or product detail will survive the shot.

The Studio on this website currently creates Q4 Preview videos. It does not offer a Q3 model switch. To compare the two, generate your Q3 version in a tool that explicitly identifies the selected Q3 variant, then bring the exports into the same review workflow.

The table separates the documented model options from controls available here. Q3 is a family of variants; check the specific model and mode before treating a setting as universal.

Q4’s extra resolution tiers are useful when the finished shot must fit a larger canvas or leave room for reframing. They are less decisive when the deliverable is a small social preview and most of the work lies in choosing the right action.

For a useful comparison, first export both versions at a shared setting such as 720p or 1080p. Inspect the subject at the same display size. Then decide whether a separate Q4 render at 2K or 4K adds useful detail for your final delivery.

Look at outlines, hair, reflections and any required product features across the entire clip. A sharp opening frame cannot establish consistency through a turn, an occlusion or a camera move.

Native audio is not exclusive to Q4. The practical question is whether the generated performance serves your scene: intelligible words, appropriate emphasis and sound that belongs to the action.

Use a brief spoken line when comparing dialogue. Listen on the same speakers, then replay with attention to mouth timing, pauses and background noise. Keep a separate note for visual identity and another for the delivery of the line; a strong result on one does not establish the other.

Q4 reference mode here can accept voice references. Give each voice a clear role in the prompt and use recordings you have permission to use. A voice reference should guide the performance, while the written brief still explains who speaks and what happens.

Each scene below uses one shared source image and the same written prompt for both models. The rooftop movement, retriever and waterfall scenes are separate from the Review page’s dialogue, product and handoff examples.

Both generators were set to 6 seconds, 720p and native audio on. The original Q4 exports are 1278 × 720; Q3 exports are 1280 × 720. All files measure approximately 6.04 seconds and contain an audio track. Q4 prompt enhancement was disabled, and Q3 background music was disabled to keep attention on native scene sound.

Play each pair at the same display size and listen to both. Use the source image and exact prompt to inspect action order, physical contact, subject identity and environmental continuity. These are individual outputs, not evidence of a typical success rate or a universal winner.

1. Choose one deliverable. Define a six-second product reveal or a single dialogue beat. Write down what must remain correct.
2. Keep shared settings aligned. Use the same source image, target duration, resolution and audio requirement wherever both tools support them.
3. Record each version. Save the exact variant, prompt, inputs, settings and exported file. Include rejected attempts in your notes.
4. Review complete clips. Watch at normal speed, then inspect hands, object contact, subject identity and spoken words more closely.
5. Compare usable outcomes. Include the cost of retries and editing, rather than comparing only the price of one submission.

Do not assume that the same seed produces matching motion across different models. If one version needs a different prompt, record that change so you know whether you are comparing model behavior or two different briefs.

This site charges Q4 Studio credits by selected resolution and duration. The table below shows its rates; these are not Vidu’s own API credits or Q3 provider prices.

A short draft can answer a specific question before a final export: does the camera move work, does the character stay recognizable, or does the dialogue fit? Change one variable at a time. Moving immediately to a longer 4K take makes every unresolved decision more expensive.

Compare Q3 costs using the actual quote from the service where you generate it. See credit packs for this site’s purchase options.

Explore Q4 for a reference-led shot that needs a higher-resolution delivery option. Start with a short draft, approve the action and then render at the resolution the project actually requires.

Keep Q3 in your workflow if you already have a repeatable setup that produces acceptable short scenes. Replacing it makes sense when a Q4 feature solves a specific production problem, not simply because the version number increased.

For exact lettering, fixed product geometry or a sequence that must match existing footage, plan an editing pass whichever model you use. Read the Q4 review for a closer look at the workflow, or follow the Studio guide to make a first draft.