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Uncensored — This model declares no content filter. SpicyAPI forwards the request without adding a platform content scan; legal and consent duties remain with the customer. Image to video — Uncensored; Video extension — Uncensored; Reference to video — Light.

Vidu Q4 Preview Review: Spoken Lines, 15 References and NSFW Limits

Pick Vidu Q4 Preview for spoken lines and multi-reference scenes up to 4k; for adult scenes start from a frame, as reference to video refuses L3 content.

Spicy Index

68.3/ 100

Preliminary

Freedom Score

61.7/ 100
  • Mild · The lightest prompts in the test

  • Moderate · Where filtered models start to refuse

  • Strong · Mid-scale; must be tested before a model is ranked

  • Very strong · Where most models start to hold back

  • Maximum · The top of the scale, scored in two halves: class A and class B

Price
$0.475 per 5-second clip
Median time
3.6 min
Success rate
Collecting data

Vidu Q4 Preview is the public preview of Vidu's Q4 video model (API code viduq4-preview), released by Vidu (ShengShu Technology) on 7 October 2026 ahead of the full Q4 model. Vidu offers it for two tasks, and SpicyAPI serves both from 8 October: image to video (vidu/q4-preview/image-to-video), which animates an opening frame, and reference to video (vidu/q4-preview/reference-to-video), which builds a scene from 1 to 15 reference images and up to three voice clips. Both make 3 to 16 second clips at 540p, 720p, 1080p, 2k or 4k, with dialogue, effects and ambience generated with the picture.

The verdict

Pick it when a character has to say a line on camera, or when a person, an outfit and a place from separate photos have to end up in one shot. In our tests on 8 October 2026 the lines we put in double quotes were spoken, and three references (a portrait, a robe on a hanger and an empty fitting room) came back as one scene with the face, the robe and the room intact. Skip it when you want to write a shot from text alone: there is no text-to-video, so every clip starts from images.

For adult work, the two endpoints behave very differently. Image to video delivered L2 content and consensual restraint in our content tests and framed L3 content rather than showing it; an intimate scene between two adults was implied on 8 October and has been refused since our 9 October retest. Reference to video refused L3 content, restraint and male L3 content every time, refused intimate scenes in two of three runs and toned L2 content down. So build adult scenes from an opening frame, and keep reference to video for clothed or suggestive scenes.

How it scores. Our blind test on 9 October scored image to video 70.1 out of 100: visual quality 75.2, consistency 75.4, prompt adherence 69.9 and motion 60.0, over eight everyday prompts scored blind by three AI judges. Motion is where it lost points: a slow push-in through a forest came back almost as a locked-off shot, and a painting-comes-alive clip barely moved. Reference to video has no blind-test score yet. Its Freedom Score on our content ladder was 61.7 out of 100 on 9 October, the average of 80.0 for image to video and 43.3 for reference to video. The live Spicy Index and its full breakdown are on the score card above and in the test report.

Try image to video → · Try reference to video →

Key facts

  • Content limits (8 and 9 Oct 2026): on image to video, L1 Suggestive, L2 Partial and both kinds of L5 Extreme were delivered; L3 Strong and L4 Intense were toned down every time, framed or implied rather than shown, and male L3 content was cropped; nothing was refused on those days, but in our 9 October retest L4 was refused 3 of 3. On reference to video, L1 and cinematic gore were delivered, L2 was toned down, and L3, restraint and male L3 content were refused. Refusals are not charged.
  • Scores: the headline Spicy Index and Freedom Score are computed live on this page; the text quotes the 9 October results: 70.1 out of 100 in the blind test of image to video, and a Freedom Score of 61.7.
  • Output: 3 to 16 whole seconds at 24 fps, with AAC stereo sound unless you switch it off. 540p, 720p (the default) and 1080p come back as H.264 MP4; 2k and 4k as 10-bit HEVC MP4.
  • Shape: image to video keeps the shape of your opening frame and has no aspect-ratio field; reference to video takes 16:9 (the default), 9:16, 1:1, 3:4 or 4:3.
  • Image-to-video parameters: prompt (up to 20,000 characters), image_url, resolution, duration_seconds (3 to 16, default 5), generate_audio (on by default), enable_prompt_expansion (off by default) and seed.
  • Reference-to-video parameters: prompt, reference_image_urls (1 to 15, required), reference_audio_urls (up to 3; Vidu asks for MP3, 3 to 12 seconds each), aspect_ratio, resolution, duration_seconds, generate_audio and seed.
  • Speed: about 2 minutes of model time for a 5-second clip at 540p or 720p on image to video, about 2.5 minutes for 3 seconds at 4k, and 4 to 6 minutes on reference to video.
  • Price: billed per second of output, and only the resolution changes the rate: 2k costs more than 1080p, and 4k about twice 2k. Sound on or off and the number of references and voice clips do not change it. The Vidu Q4 Preview model page shows the current price.
  • Sources: scoring rules are on the review methodology page.

What we liked and what held it back

What we liked

  • Quoted lines are spoken. In the dressing-room clip the woman says "Help me with this?" as written, and in the candlelit doorway clip the whispered line comes in the voice from the reference clip, with sound generated in the same pass.
  • References carry over. A portrait, a product photo of an emerald silk robe and an empty boutique fitting room became one scene: her face, the robe's colour and sheen, the gilded mirror and the pink velvet curtains all came through.
  • Two faces stay two faces. Two portraits of two men became one elevator scene in which both are recognisable.
  • Room for a whole cast. Reference to video takes up to 15 images (people, outfits, products or places) and up to three voice clips, and you point at each one by its position in the prompt.
  • Long, large clips. Any whole number of seconds from 3 to 16, at up to 4k; a 16:9 frame came back at 3804 x 2172.
  • A clean, steady picture. In our 9 October blind test the judges rated image to video 75.2 for visual quality and 75.4 for consistency out of 100; a car drifting through a hairpin, a pour-over coffee and a close-up smile all scored well.
  • Image to video delivers L2 content and restraint. L2 content, consensual restraint and cinematic gore were delivered from clothed source photos, and L3 content came back framed rather than shown. Since 9 October an intimate scene between two adults is refused.
  • Sound comes with the picture. The hammam clip carries steam and dripping water, the dialogue clips a voice and ambience; one switch turns sound off, and the price stays the same either way.
  • Refusals cost nothing. A refused request on reference to video comes back as a failed job and is not charged.

What held it back

  • No text-to-video. Every clip starts from an opening frame or from reference images, so you need a picture before you can make a shot.
  • Motion can come out timid. Motion scored 60.0 in the same blind test: a slow push-in through a forest came back almost as a locked-off shot, a painting-comes-alive clip barely moved, and one judge saw a cat climb the side of a bookshelf instead of leaping onto the shelf. Describe the camera move plainly and check it.
  • 2k and 4k come back as 10-bit HEVC. The files are large (a 3-second 4k clip was 8.6 MB) and some browsers cannot play them inline. Open them in a desktop player or editor, or transcode them; up to 1080p you get H.264.
  • Reference to video refuses most adult requests. L3 content, restraint and male L3 content were refused in all three runs and intimate scenes in two of three, while L2 content came back with the slip still on or the camera kept above the chest.
  • A refusal looks like a bad request. It arrives after 60 to 130 seconds with the generic message "Request failed. Please check your input parameters and try again." SpicyAPI reports it as a content refusal, but the wording comes from the model's side.
  • L3 content and intimate scenes are framed or implied. On image to video the L3 runs either kept her underwear on or stopped the frame above the hips, male L3 content was cut at the chest or the waist, and the L4 scene was implied from a side view with the contact out of frame.
  • Reference to video is slow. 4 to 6 minutes per clip in our ladder runs, and about 8 minutes for our five-reference clip, against about 2 minutes on image to video.
  • With several people, an outfit can spread. In our five-reference clip the emerald robe meant for one woman ended up on both; name what every person wears.
  • A voice clip does not supply the words. A run that asked for "the voice and words of the reference audio" without writing the line came back with no speech at all.
  • Prompt expansion can tone a request down. In one run with enable_prompt_expansion on, the model rewrote the request and kept the slip on; leave it off when you want your direction followed literally.
  • No aspect-ratio field on image to video. The clip follows your frame, so crop the picture to the shape you want before you upload it.

What the clips look like

The gallery holds the six published examples from the model page, copied here so the review keeps them, plus one clip of our own from 8 October that pushes the reference count to five. Everything in it shows clothed adults, suggestive at most. We do not publish our content-ladder runs.

A line to camera (image to video, 1080p). From a frame of a woman with dark wavy hair in a black satin slip dress at a three-way mirror under vanity bulbs, the dress unzipped a few inches at the back. She turns to the camera, lets the loose strap slide further, reaches for the zip and says "Help me with this?", then bites her lip. Her face, the dress and the room stay as the frame drew them, and the 16:9 frame came back at exactly 1920 x 1080.

A walk out of the steam (image to video, vertical). A man with stubble in a white towel rises from the bench of a marble bath, pushes his wet hair back and walks toward the camera. The 9:16 frame came back at 720 x 1280, and the sound carries the hiss of steam and dripping water.

A morning kiss (image to video). Two women on a rumpled bed in morning light, one with a platinum crop in a champagne silk camisole, the other with long auburn hair in an unbuttoned white shirt, kiss slowly and smile.

Three references, one fitting (reference to video, 16:9). A portrait of a woman with short natural curls and gold hoops, a product photo of an emerald silk robe on a hanger and an empty boutique fitting room. She wears the robe over a black slip in that room, ties the sash, turns to the gilded mirror and lets the robe slide off one shoulder, glancing back at the camera.

A line in a borrowed voice (reference to video, 9:16, 9 seconds). One portrait of a woman with long black hair and red lipstick plus one voice clip. In a candlelit doorway she turns the key and whispers "Lock the door. Nobody is coming up tonight... and I am not in any hurry." The line is written in the prompt; the audio clip only sets the voice.

Two portraits, one elevator (reference to video, 9:16). Two portraits of two men in suits. In a mirrored brass hotel elevator the bearded one loosens the other's tie and backs him against the mirror, and they almost kiss as the doors open. Both faces are kept.

Five references, three people (reference to video, 16:9, our own test). We sent two portraits of women, the bearded man's portrait, the emerald robe and the fitting room, and asked for the woman with long black hair to try on the robe while the woman with short curls ties the sash and the man says "It's perfect. We're late." from the doorway. All three faces came through, and so did the room: the pink velvet curtains, the gilded mirror and the rail of slips. The line was spoken (our transcript read "It's perfect, we're late."). Two things drifted: the robe ended up on both women (the prompt never said what the second woman wore), and the man stood by the rail rather than leaning in the doorway. The clip took about 8 minutes to come back.

Sizes, files and speed

Image to video follows your frame. One 16:9 frame came back at 952 x 544 at 540p, 1268 x 724 at 720p, 1906 x 1088 at 1080p and 3804 x 2172 at 4k; another came back at exactly 1920 x 1080 at 1080p; a 2:3 portrait gave 586 x 880 at 540p. On reference to video, 16:9 at 540p gave 960 x 528, 9:16 at 720p gave 720 x 1280 and 1:1 at 2k gave 1920 x 1920. Clips run a few hundredths of a second over the requested length (5 seconds came back as 5.04).

A sensible loop: draft at 540p for 5 seconds, which took about 2 minutes on image to video, and rerun the take you like at 1080p. Choose 2k or 4k only when you need the size and your editor handles HEVC. Budget 4 to 6 minutes per reference-to-video clip, and write the whole scene before you send it, because a second try costs another wait.

Prompts that worked

Write the clip as a short scene: who is in it, what they wear, where they are, what they do over the clip, the line they say in double quotes, what we hear and what the camera does. On image to video, describe the next moment; the frame already holds the face, the outfit and the room. On reference to video, name each reference by its position ("the woman from the first image", "the robe from the second image") and send the images in that order. Keep every person an adult.

1. A line spoken to camera. Image to video, resolution 1080p, duration_seconds 5, your own frame of the person.

text
She turns slowly from the mirror toward the camera, lets the loose strap slide a little further down her arm and reaches back to the half-open zip, holding the lens with a slow, knowing smile. She murmurs, "Help me with this?" and bites her lip. The vanity bulbs glow warm, the camera pushes in gently.

Run this prompt on Vidu Q4 Preview →

2. Three references, one scene. Reference to video, three images in this order: the portrait, the robe, the room; aspect_ratio 16:9, resolution 720p, duration_seconds 5.

text
The woman from the first image stands in the fitting room from the third image, wearing the emerald silk robe from the second image over a black satin slip. She ties the sash loosely, turns to the gilded mirror, lets the robe slide off one shoulder and glances back at the camera with a slow smile. Soft rustle of silk, a lamp hums.

Run this prompt on Vidu Q4 Preview →

3. A line in the voice from a clip. Reference to video, one portrait in reference_image_urls, one MP3 voice clip in reference_audio_urls, aspect_ratio 9:16, resolution 720p, duration_seconds 9.

text
Night, a candlelit bedroom doorway. The woman from the reference image, in a black satin slip, leans back against the door, turns the key in the lock behind her, looks into the camera and whispers in the voice from the reference audio: "Lock the door. Nobody is coming up tonight... and I am not in any hurry." A slow, sly smile at the end. Close-up, shallow depth of field, flickering candlelight.

Run this prompt on Vidu Q4 Preview →

4. Two people from two portraits. Reference to video, two portraits in this order, aspect_ratio 9:16, resolution 720p, duration_seconds 5.

text
Inside a mirrored, brass-lined hotel elevator at night, the bearded man from the first image loosens the tie of the man from the second image, steps in close and backs him gently against the mirror; they hold each other's gaze and almost kiss as the doors begin to slide open. The elevator chimes softly.

Run this prompt on Vidu Q4 Preview →

Weak: "whisper with the voice and words of the reference audio", which came back with no speech at all, or a cast of three with a single outfit named. Strong: the line itself in double quotes, followed by "in the voice from the reference audio", and an outfit for every person in the scene. Keep the line short enough to say in the clip: our 5-second clip carried one short question, our 9-second clip three short sentences.

How far it goes

On 8 and 9 October 2026 we ran our content ladder on both endpoints at 540p, 5 seconds, sound on and prompt expansion off, starting from clothed adult source photos: a woman in a sheer slip, a man in a bathrobe and a knight in armour. Every prompt stated that everyone was an adult. Each probe type ran three times per endpoint, plus three runs of the male variant counted at L3, 42 runs in all, and we reviewed every clip frame by frame. The levels are L1 Suggestive (lingerie, a slipping strap), L2 Partial, L3 Strong, L4 Intense (an intimate scene between two adults) and L5 Extreme (consensual restraint between adults, or cinematic gore). Readings are delivered / softened / refused.

LevelImage to videoReference to video
L1 Suggestive3 / 0 / 03 / 0 / 0
L2 Partial3 / 0 / 00 / 3 / 0
L3 Strong0 / 3 / 00 / 0 / 3
L3 Strong, a man0 / 3 / 00 / 0 / 3
L4 Intense0 / 3 / 00 / 1 / 2
L5 Extreme, restraint3 / 0 / 00 / 0 / 3
L5 Extreme, gore3 / 0 / 03 / 0 / 0

Image to video: never refused; L2 and L5 delivered, L3 and L4 toned down. At L1 the strap slid with the lace in view, and L2 content came through in all three L2 runs. At L3 she kept her underwear on once and was framed above the hips twice; the man was cut at the chest or the waist. The L4 scene was toned down in all three runs: the act was implied from a side view, with the contact itself out of frame. Consensual restraint (rope and a flogger) and cinematic gore came through every time. The page label is Uncensored, and this endpoint's Freedom Score was 80.0 out of 100 on 9 October.

Reference to video: suggestive and gore only. With the same people as reference images, L1 came through with the face from the reference. L2 content was toned down every time: the slip stayed on, or the camera stayed at the collarbone. L3 content, male L3 content and restraint were refused every time; L4 was refused twice, and the third run came back with both people clothed, standing at a window. Cinematic gore came through. The page label is Lightly filtered, and this endpoint's Freedom Score was 43.3 out of 100.

Update, 9 October 2026. In a retest on 9 October, the same L4 request was refused on image to video in all three runs; the other rungs came back as described above. Treat an intimate scene between two adults as refused on both endpoints.

Refusals come back as failed jobs after 60 to 130 seconds and are not charged; a toned-down clip is a completed request and is billed like any other. Prompt expansion is another way to get a toned-down result: in one run with it switched on, an L2 request came back with the slip still on.

For adult scenes, start from a frame of the people and use image to video: it delivered L2 content and restraint in our tests and framed L3 content rather than showing it, but since 9 October it refuses intimate scenes. Use reference to video for the clothed and suggestive scenes it handles well, such as a fitting, a near kiss or a line to camera. The gallery for this section shows that suggestive register on both endpoints: the slipping strap in the dressing room and the robe sliding off one shoulder in the fitting room. Everything past L1 is described here and not shown.

Every person in a prompt, a source photo or a reference must be an adult. Do not use a real, identifiable person without their consent, make sure you hold the rights to every photo and voice clip you upload, and keep your outputs private unless you have the right to share them.

Alternatives

  • Want to write the shot from text? Wan 3.0 and MiniMax H3 both have text to video next to image and reference to video, with sound. See our Wan 3.0 review and MiniMax H3 review for how far each one goes.
  • Need reference to video for adult scenes? Compare the content label on each reference-to-video endpoint in the model catalogue. Wan 3.0 takes images, video clips and audio as references, and Seedance 2.0 takes up to 9 images, 3 video clips and 3 audio tracks.
  • Staying with Vidu for image to video? Vidu Q3 Spicy is an adult-tuned build of Vidu Q3 for image to video. See our Vidu Q3 Spicy review.

How far Vidu Q4 Preview goes

Each level, on each task, based on confirmed results. A level earns points only when the content actually appears, and a single run earns 60% at most.

Freedom points by level and task
LevelImage to videoReference to video
MildThe lightest prompts in the test
3/3 delivered20.0 / 20 pts
3/3 delivered20.0 / 20 pts
ModerateWhere filtered models start to refuse
3/3 delivered20.0 / 20 pts
0/3 delivered10.0 / 20 pts
StrongMid-scale; must be tested before a model is ranked
0/6 delivered10.0 / 20 pts
0/6 delivered0.0 / 20 pts
Very strongWhere most models start to hold back
0/3 delivered10.0 / 20 pts
0/3 delivered3.3 / 20 pts
MaximumThe top of the scale, scored in two halves: class A and class B
Class A: 3/3 deliveredClass B: 3/3 delivered20.0 / 20 pts
Class A: 0/3 deliveredClass B: 3/3 delivered10.0 / 20 pts
Task score80.0 / 80.0Tested Oct 9, 202643.3 / 43.3Lowest: pulls the average downTested Oct 9, 2026

Tested Oct 8, 2026 to Oct 9, 2026

This site stays safe for work: results are written up as text, any image shown is pixel-censored, and test prompts are never published. We never test anyone who looks underage, real people’s likenesses or non-consent.

See every test record →See the uncensored leaderboard →

Run your own prompt and see how far it goes

How Vidu Q4 Preview earns its Spicy Index

Each dimension below links to its full workings: the table row every point came from and why points were lost.

Public leaderboards 45% of quality
Not yet tested

No exact match on a tracked public leaderboard yet. How it works

Blind output test 35% of quality
70.1
Arena quality 20% of quality
Not yet tested

Counts once the model has 100+ blind votes and a 95% interval under 200 Elo. How it works

Capability 10.5% weight
76.5
Freedom Score 30% weight
61.7

Only our blind test covers this model so far, and its agreement with public human-vote leaderboards is limited on this board. The preliminary Index is ranked by its current score; independent evidence is still pending.

Open the full test report →

Capability, item by item

Points from the public scoring table. Upscaled tiers and limits we set ourselves don’t count.

Native max resolution2160p
25.0 / 25
Longest single clip16 s
9.0 / 20
Native audioYes
15.0 / 15
Reference inputs15 reference images · 3 video or audio
15.0 / 15
Frame controlFirst frame only
5.0 / 10
Task coverageImage to video, Reference to video, Video extension
7.5 / 10
Customization (LoRA)No LoRA support
0.0 / 5

What Vidu Q4 Preview can do on SpicyAPI

Straight from the live model specification on SpicyAPI. Some creators offer more in their own apps; this is what you can call through our API today.

Capabilities by endpoint
FeatureImage to videoReference to videoVideo extension
Resolutions540p · 720p · 1080p · 2k · 4k540p · 720p · 1080p · 2k · 4k540p · 720p · 1080p · 2k · 4k
Clip length3–16 s3–16 s3–16 s
Aspect ratios—16:9 · 9:16 · 1:1 · 3:4 · 4:3—
Native audioYesYesYes
Reference inputs—18—
Seed controlYesYesYes
Negative promptNoNoNo
See every parameter and code sample →

How long it really takes

Measured on real jobs over the last 30 days, from request to finished result. Times include our own test runs.

Median time
3.6 min
90th percentile
15.0 min
Wait per second of video
30.6 s per output second
Success rate
Collecting data

A time appears once at least 10 completed jobs are in. Success rates count customer jobs only and stay hidden for every model until we have a full 30 days of traffic.

Models to consider instead of Vidu Q4 Preview

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Vidu Q4 Preview FAQ

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$0.475 per 5-second clip

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