Which AI video model is best for which job?

An AI video model is the engine that turns a prompt (a written instruction) or a still photo into a short clip. Different engines are strong at different things, and the same engine can be cheap or expensive depending on where you buy it. This page is about choosing by job. For a ranking of products, read Best AI Video Generators for Small Business or the agencies version.

This page may contain affiliate links from which Blur Studio earns commissions.

Which models exist, who makes them, and which are closed

• Kling, a family of video models from the Chinese company Kuaishou. Kling 4.0 is listed on its own pages and on several platforms. See What Is Kling AI.
• Seedance, video models from ByteDance, the company behind TikTok. See What Is Seedance.
• Veo, Google's video model family. See Higgsfield vs Veo and Flow.
• Runway Gen-4.5, from Runway, a company with its own website for making and editing video. Runway also hosts other makers' models on its plans.
• Wan, an open video model family, which matters if you want to run it yourself.
• Hailuo, from the company MiniMax, and Grok Video, from xAI.

Sora is closed. OpenAI's help page says its app ended on 26 April 2026 and its API on 24 September 2026. Ignore any guide that still recommends it.

Availability also moves. Google's documentation says the Veo 3.1 preview models in its Gemini API were shut down on 22 October 2026, and it points developers to Gemini Omni Flash or to the general release of Veo on its Gemini Enterprise Agent Platform. The lesson: check that a model is still on offer in the place you plan to use it before you build a workflow on it.

Six jobs, and which models to test for each

This table is a shortlist to test, not a ranking. Vendor blogs and arena scores (crowd votes on generic prompts) disagree, and none of them test whether your logo survives. The shortlists below come from what each model is listed as supporting, such as clip length, audio, reference images and editing.

Job	What the job needs	Models to test first
Product shot from an approved photo	Image-to-video that keeps the label and shape	Kling 4.0, Seedance 2.5, Veo 3.1
Talking scene with sound	Native audio, a steady face	Seedance 2.5 (inside Higgsfield's Cinema Studio 4.0, which has native audio), Veo 3.1, Kling
Cinematic mood clip	Camera moves, lighting, longer clips	Seedance 2.5 (listed at 4 to 30 seconds on Higgsfield), Kling 4.0 (3 to 30 seconds), Veo 3.1
Social hook, 3 to 5 seconds	Speed and low cost per try	Kling 4.0 Flash, Seedance 2.0 Mini, Wan
Edit an existing clip	Video in, changed video out	Runway (its Aleph 2.0 is on its plans), Kling 4.0 video edit, Cinema Studio Edit Video mode
Multi-shot story with the same character	Many reference images	Seedance 2.5 (up to 50 references per Higgsfield), Kling 4.0 (up to 7 elements)

I leave out "Veo wins dialogue" and "Seedance wins consistency" claims. Vendor blogs make them with no stated method. Make the models earn the place on your own footage.

The same-prompt, five-clip test

Run this before you commit money.

1. Choose one real job and one approved still image (or one written prompt).
2. Write one prompt. Do not change it between models. Say the camera move, the action and what must not change.
3. Generate 5 clips on each of two shortlisted models, at the same length and resolution.
4. Score each clip pass or fail on five checks: identity holds (face, product, label), hands and text are readable, motion is not rubbery, audio matches the picture, and the first try is usable.
5. Record price per clip and the number of tries until a keeper.

Pass rule: a model passes if at least 2 of 5 clips are usable on the first try, and the best clip needs no more than one fix. Fail it if the label or logo breaks in more than one clip. Detailed quality checks are in the AI video quality check.

Cost per usable clip

The formula: price per second x clip seconds x attempts per keeper. Per-second price comes from the vendor. Attempts per keeper comes from your test: tries divided by clips you would actually publish. Most price tables hide the third number, and it often matters more than the first.

Two vendors print enough to do real arithmetic.

Runway. Its pricing page lists Gen-4.5 at 12 credits per second, so a 5 second clip costs 60 credits. Plans as of 4 November 2026, so check the page: Free gives 125 one-time credits; Standard is $15 a month ($12 billed annually) for 625 credits; Pro is $35 ($28) for 2,250; Max is $95 ($76) for 9,500.

Runway plan	5-second Gen-4.5 clips per month (before retries)	Price per Gen-4.5 second if you use every credit (monthly billing)
Standard, 625 credits	10 (625 divided by 60)	about $0.29
Pro, 2,250 credits	37	about $0.19
Max, 9,500 credits	158	about $0.12

The right-hand column is my arithmetic from Runway's plan prices and the 12 credits per second rate, not a figure Runway prints. At 3 attempts per keeper, Standard yields about 3 keepers a month. That shows why plan size matters more than model choice. Runway's page says Standard and Pro monthly credits do not roll over, Max allows one month of rollover, and purchased credits never expire.

Kling's API. The API (the route for software to call the model) bills in units per second. Kling's own table lists Kling 4.0 at 1.0 unit per second at 720p and 1.5 at 1080p, Kling 4.0 Flash at 0.6 at 720p, and Kling 3.0 at 0.6 (no native audio) to 0.9 (with native audio) at 720p. Its first prepaid package is $500 (listed at $510 with a 2% discount) for 3,250 units, a discounted unit price of $0.15386, valid for 180 days with no rollover or extension. So Kling 4.0 at 720p works out to about $0.154 per second, Kling 4.0 at 1080p to about $0.231 (1.5 units), and Flash at 720p to about $0.092 (0.6 units), on that package. A worked example with made-up attempts: an 8 second Kling 4.0 clip at 720p is 8 units, about $1.23 (8 x $0.15386). At 4 attempts per keeper, one usable clip costs about $4.92.

Same model, two routes. Runway's pricing page also sells Kling 4.0: 118 credits for a 5 second 1080p clip (89 credits during a 25 percent promotion Runway says runs until 30 November). Runway Standard is $15 for 625 credits, about $0.024 a credit, so a 118 credit clip is about $2.83, or $0.57 a second, before the promotion. Kling's own package works out to about $0.23 a second at 1080p. That is my arithmetic from two pages as of 4 November 2026. The gap is the price of Runway's editor, storage and other models, and it only matters if you would not use those. It also assumes you use every credit, which Standard does not roll over.

Veo. Google's per-second Veo prices were not available, and forum figures are stale, so none are given. Check Google's pricing page. Google's pricing page does show Gemini Omni Flash (its video generation and editing model, now general release for paid developers) at about $0.10 per second of 720p video on its Standard tier, from 5,792 tokens per second, as of 4 November 2026.

Be careful with blog tables of per-second prices for Veo, Kling and Seedance: they often cannot be tied to any vendor page. Use vendor tables, and say which resolution, audio setting and package each price assumes.

Audio, length and resolution limits that decide the shortlist

• Audio. Native audio is a separate decision from picture quality. Higgsfield's help centre says Cinema Studio 4.0 (which runs on Seedance 2.5) has native audio. Kling's pricing has audio and no-audio tiers, so the same model costs different amounts.
• Length. A 5 second limit forces you to stitch. Listed ranges on Higgsfield run from 3 to 30 seconds for Kling 4.0 and 4 to 30 seconds for Seedance 2.5.
• Resolution. 720p is fine for drafts and social previews. Price rises with resolution, as Kling's 1.0 versus 1.5 units shows.

One platform with many models, or each model direct

Buying each model direct gives you the maker's newest features first, and sometimes cheaper volume pricing, such as Kling's prepaid package. A platform that bundles several models changes the question from "which model" to "which credit system is cheaper for my mix". Runway, for example, lists Kling 4.0 and Seedance 2.0 Pro on its plans alongside its own models. The trade-off is that a platform may not offer every version or every feature. For a head-to-head on platform cost, see All-in-One AI Creative Platform vs Separate Tools, and for the named comparisons, Runway vs Kling vs Veo vs Higgsfield, Higgsfield vs Kling and Higgsfield vs Runway.

Mistakes that waste credits

• Using the premium model for drafts. Draft on a fast variant (Kling 4.0 Flash is 0.6 units a second against 1.0 for Kling 4.0 at 720p) and use the premium model only on approved storyboards.
• Changing the prompt and the model at once, so you cannot tell which helped.
• Choosing by arena rank. Arenas measure crowd taste on generic prompts, not logo fidelity.
• Ignoring audio when the job needs speech.
• Forgetting that unused monthly credits may expire.

Where Higgsfield fits, and where it does not

Higgsfield's video models are useful for exactly this test, because its tool list holds several of them under one login: Kling 4.0, Seedance 2.5 and 2.0, Veo 3.1 and Veo 3.1 Lite, Wan 3.0, Hailuo, MiniMax H3, Grok Video and FLUX 3 Video. Sora is not on that list. You can send one prompt to two models and compare, rather than opening two accounts. If a deadline matters, read about queue and wait times before you plan the test. I use Higgsfield for this kind of comparison myself.

Know what it does not give you. Higgsfield does not publish a credit price for Kling 4.0 or Seedance 2.5, so the cost shows on the Generate button and you must write it down per test clip. There is no per-second figure comparable to Runway's or Kling's tables, so do not guess one. Some older models may show a per-clip credit cost on its pricing page, but check it live. Plan prices and the credit logic are explained in Higgsfield credits and how to spend them, and the Seedance-based film tool is covered in Higgsfield Cinema Studio.

Who should skip Higgsfield for model choice

• You edit existing footage most of the time. Runway lists a dedicated editing model, and a normal video editor may do the job for less.
• You run high volume through your own software. Kling's prepaid API package gives a printed per-second price you can budget against.
• Privacy or self-hosting matters. An open model such as Wan, run on your own machines, keeps footage in-house. Higgsfield's terms say it may train on content except under an Enterprise agreement.
• You only ever use one model. The bundle is worth it when you compare.

Re-check list: why this page goes out of date

Before you rely on any line above, check that the model name still exists where you plan to use it, that the vendor price table has not changed, that the plan still includes the model, and that the length and audio limits match. Figures on this page are as of 4 November 2026.

How I'd approach this

I would pick the one job that costs you the most time today, shortlist two models from the table, and run the five-clip test with the same still and the same prompt. I would write down credits per clip and tries per keeper, then use the formula. Whichever model gives the lowest cost per usable clip with no label or face problems is your default for that job. Repeat per job, and re-run quarterly, because models change.

If your team makes video for clients every week, the thing worth building is the repeatable part: a test sheet, an approval step and a shared library of approved clips and prompts. Blur Studio builds that kind of approval and asset workflow around these tools.