Which AI Video Model for Short Drama in 2026: Seedance vs Kling vs Hailuo vs Wan vs Veo vs Sora

A short drama depends on three things: whether the line comes out of the right mouth (native audio plus speaker attribution), how many reference images one call accepts (character consistency across episodes), and whether one segment can hold 3–5 cuts. As of September 2026: dialogue goes to Veo 3.1, Hailuo H3 or Seedance 2.0; action to models that take reference video (Seedance, Wan 3.0); volume work drafts on Veo 3.1 Lite or Wan 3.0 and re-renders only the keepers at 1080p.

The short version: choose by task

All six models produce a presentable clip in September 2026. The differences sit in the numbers a drama pipeline actually depends on: who speaks the line, how many reference images fit in one call, how long one segment can run, which words get a request rejected, and what a second costs on which channel. All of it is in official docs.

Three conclusions. First, for dialogue-heavy scenes only consider models with native audio and some form of speaker attribution: Veo 3.1, Hailuo H3, Seedance 2.0, Kling 3.0. Second, cross-episode consistency is set by reference-image caps: Seedance 9, Hailuo 9, Wan 10, Vidu 7 subjects, Veo 3; Sora treats its reference as a first frame only and rejects images with faces, so a character-sheet workflow does not run on it. Third, a 30-second cap (Wan 3.0) is not an advantage by itself.

Decision table: capabilities

Speaker attribution means the model hands a line to the character you name rather than to the largest face in frame. Only Kling 3.0 documents it explicitly; Hailuo H3 reaches it through reference audio; the rest depend on how the prompt tags the speaker.

Decision table: price and availability

Two cautions. Volcengine bills by token, so a 480P second and a 720P second cost different amounts; treat any per-second figure as an estimate. Hailuo and Vidu run separate catalogues and price lists for their international and mainland sites; do not convert one into the other.

Lip sync and speaker attribution

A 90-second episode carries 40–60 seconds of dialogue. Without native audio you render silent and run a lip-sync pass afterwards. For dialogue, cross out every option without native audio first.

Then ask who speaks. In SinCoSphere editorial testing on production pipelines, the most common failure was a line delivered by whichever face was most prominent in frame. Kling 3.0 documents per-character speaking. Hailuo H3 accepts up to three reference-audio clips totalling 15 seconds. Veo 3.1 and Seedance 2.0 rely on the prompt: name the speaker before every line, state where that speaker is in frame, and never place a line inside another character's close-up.

One hard rule: if the segment runs two seconds or more longer than the dialogue and no closing action is written, the model repeats the line to fill the time. Count English at roughly 2.5 words per second and spend the surplus on an action.

Multi-character shots and reference images

A character survives across episodes only if every call carries that character's sheet, so the reference cap and its rules matter more than headline quality.

• Veo 3.1: 3 images.
• Sora 2: the reference is a first frame, and images with faces are rejected. No sheet workflow.
• Hailuo H3: 9 images, first five free; first frame and references are mutually exclusive.
• Kling 3.0: multi-image, element and video reference; the image cap is not published.
• Seedance 2.0: 9 images plus 3 video and 3 audio clips.
• Wan 3.0: 10 images plus 5 video clips.
• Vidu Q3: 7 subjects.

Crowded frames are weak everywhere: past four people, faces blur together. The fix is in the storyboard, not the model: break a three-plus scene into two-person shot–reverse-shot pairs and one wide with no facial detail.

Segment length and in-segment cuts

A segment is what one call returns; a shot is one camera setup inside it. The efficient pattern is 10–15 seconds holding 3–5 shots.

Wan 3.0 allows 30 seconds, Vidu Q3 16, Seedance 2.0, Hailuo H3 and Kling 3.0 stop at 15, Veo 3.1 is built around 8 with extension, and the Sora 2 API offers 4, 8 or 12. A bigger number is not a usable number: in one SinCoSphere 30-second test, 6 of 8 planned cuts were executed (single sample).

Practical settings: dialogue 10–15 seconds; action 5–8 seconds with at most two setups; the reveal or cliffhanger gets its own segment. Veo 3.1's 8-second baseline is its main drawback for drama: a 90-second episode needs 11–12 calls and as many joins.

Resolution, moderation and availability

Vertical drama ships at 1080×1920. Draft at 480P or 720P and re-render only approved segments at 1080p or 2K. Wan 3.0 offers all three tiers; Hailuo H3 has 768P and 2K.

Moderation is underrated. Alibaba's Green Net returns DataInspectionFailed on words like blood, corpse, severed or open wound before rendering. Write violence as its two ends (a body falling, eyes closing, a dark stain, a shattered mirror), never the wound. Sora 2 is strictest in the West: no real people, no input images with faces, no copyrighted characters.

Outside China: Veo (Gemini API, Vertex, Flow), Sora, Hailuo international, Kling global, Vidu international. Inside mainland China there is no compliant channel for Veo or Sora; treat them as export-version options only.

Three recommended setups

Dialogue (two-hander, line-heavy): Veo 3.1, Fast for drafts ($0.10 per second) and Standard for finals, every line tagged with its speaker; or Hailuo H3 with reference audio bound per character; or Kling 3.0 global for documented per-character speaking. Segments of 10–15 seconds, 3–5 shots, two sheets plus one plate.

Action (chase, standoff, fight): choose by reference video. Seedance 2.0 takes 3 clips and Wan 3.0 takes 5. Segments of 5–8 seconds with one or two setups; never more than three people in frame; write a door or a thrown glass as two shots with start and end states.

Volume (daily output): draft at the cheapest tier, review the whole episode, re-render only the keepers. Outside China that is Veo 3.1 Lite ($0.05 per second) or Vidu Q3-turbo 540P off-peak; on Wan 3.0 it is 480P at ¥0.3 or 720P at ¥0.6, then 1080P at ¥1.2 for keepers, about ¥27–54 for a 90-second draft. Clean gore wording out first, or moderation failures eat the savings.

Key figures and sources

Sources

• https://ai.google.dev/gemini-api/docs/video
• https://ai.google.dev/gemini-api/docs/pricing
• https://developers.openai.com/api/docs/guides/video-generation
• https://developers.openai.com/api/docs/api-reference/videos/create
• https://developers.openai.com/api/docs/pricing
• https://platform.minimax.io/docs/guides/pricing-paygo
• https://app.klingai.com/global/quickstart/klingai-video-3-model-user-guide
• https://developer.volcengine.com/articles/7606009619928449070
• https://finance.sina.com.cn/tech/roll/2026-03-04/doc-inhpvpqk3838479.shtml
• https://news.qq.com/rain/a/20260211A02P8H00
• https://help.aliyun.com/zh/model-studio/wan3-video-generation-api-reference
• https://news.qq.com/rain/a/20260806A0E2YY00
• https://platform.vidu.com/docs/reference-to-video
• https://platform.vidu.com/docs/pricing

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