Kling 4.0: Pricing, API Cost & Flash (2026)

Kling 4.0 is open to everyone, with 30-second AI videos, 10 keyframes and Flash. See current plan prices, the new API price preview and whether it’s free.

Kuaishou’s Kling 4.0 is the newest video model from Kling AI. It generates videos of up to 30 seconds in a single pass, with up to 10 keyframes, 15 reference assets and two-channel stereo audio. After a limited early access for Kling 4.0 Flash from September 28, Kling says the full model became available to everyone on October 15, 2026.

What’s new (Oct 2026)

Updated October 19, 2026. Kling’s Kling 4.0 release note now says the all-new Kling 4.0 “officially became available to everyone on October 15”, and the Kling site leads with “Kling 4.0 Available Now”. Here’s what changed, checked on Kling’s official pages today:

• Open to all accounts: Kling 4.0 is no longer limited to Ultra Yearly early access. You pick it in Kling’s Video Generation workspace.
• Kling 4.0 Flash for everyday use: a faster model for frequent creation, with text-to-video, image-to-video (first frame) and Omni Reference, 3 to 20 seconds at 720p.
• Redesigned creation page: one input box for images, videos and audio references, grid and list views, a continuous timeline, and a new canvas with an Agent that can plan and run tasks.
• MCP and CLI support: Kling 4.0, including Omni Reference and keyframes, works through Kling’s MCP server and CLI, so AI agents can automate it.
• New plans and a launch discount: Kling added Premier and Ultra+ tiers with more credits, and shows a limited-time 10% discount on Kling 4.0 for Pro, Premier and Ultra+ members (details in the pricing section below).
• Still coming soon: 10-bit HDR output at 1080p and 4K, and video extension up to 2 minutes.

Is it actually free? Posts on X described Kling 4.0 as “free for all”. Kling’s own wording is “available to everyone”: every account can select it, but generations still use credits, and Kling hasn’t announced free Kling 4.0 generations. See the pricing section for what plans cost now.

What is Kling 4.0 and why is it trending?

Kling first showed Kling 4.0 at the end of September, with Kling 4.0 Flash going to a limited group of creators on September 28. The October 15 general release, a launch discount and a wave of creator videos, including “The Beat”, which Kling’s blog calls a 5M+ hit, pushed it to the top of AI video conversations this week. Its Kling 4.0 feature page cites more than 60 million users and 600 million AI videos generated on Kling.

The upgrade is a big jump from Kling 3.0. Kling says 4.0 offers longer videos of up to 30 seconds in one pass, adds multi-keyframe control, accepts far more references in one task and supports 21:9 ultrawide framing, with native 4K and 1080p output in 10-bit HDR listed as coming soon.

How Kling 4.0 works

Kling describes 4.0 as a native multimodal video model. Text-to-video, image-to-video, references, video continuation and editing all live in one panel in Kling Creator Studio. A typical workflow looks like this:

1. Start from text or images: write a prompt of up to 8,000 tokens, or upload a first frame, last frame or up to 10 keyframes.
2. Add references: combine up to 15 assets in one task, including up to 10 images, 5 videos (30 seconds in total), voice references and 7 subjects, called elements.
3. Pick the format: 3 to 30 seconds, at 720p, 1080p or 4K, in 21:9, 16:9, 1:1 or 9:16.
4. Generate with sound: Kling says 4.0 adds two-channel stereo audio, better lip sync and dialogue in languages including English, Chinese, Japanese, Korean, Spanish, Portuguese, German, French and Hindi. If a clip comes out with music or effects you don’t want, Mirelo SFX can replace them with synced sound effects while keeping the dialogue.
5. Edit or extend: re-edit an expression, camera angle, background or line of dialogue using up to 5 clips, then extend a video forward or backward up to 2 minutes in total once video extension arrives. Kling lists extension as coming soon.

Kling 4.0 vs Kling 4.0 Flash

Kling 4.0 Flash is built on Kling 4.0 but supports only some of its features. Here’s how the two compare, according to Kling’s feature page and release note:

Feature	Kling 4.0	Kling 4.0 Flash
Availability	Available to everyone since October 15, 2026	Available to everyone since October 15, 2026
Video length	3–30 seconds per pass	Up to 20 seconds per pass
Resolution	720p, 1080p and 4K	Up to 720p
Dynamic range	10-bit HDR at 1080p and 4K (coming soon, per Kling)	8-bit SDR
Modes	Text-to-video, image-to-video, first and last frames, up to 10 keyframes, Omni Reference	Text-to-video, image-to-video (first frame) and Omni Reference. No last frame or keyframes

Kling 4.0 Pricing (2026)

Kling 4.0 runs on Kling AI’s credit-based membership plans. Kling hasn’t published how many credits Kling 4.0 or Kling 4.0 Flash use per second on its public pages, so check the cost shown in the generation panel before you start long or 4K jobs. These are the monthly plans on Kling’s membership page, checked on October 19 and again on October 23, 2026 (USD), with no price changes:

Plan	First month	Then (monthly)	Credits/month	Cost per 100 credits
Standard	$6.99	$8.80/month	660	$1.06
Pro	$25.99	$32.56/month	3,000	$0.87
Premier	$135	$181.99/month	18,000 (default option)	$0.75
Ultra+	$402	$544.99/month	57,000	$0.71

• Kling 4.0 discount: Pro, Premier and Ultra+ list a limited-time 10% off Kling 4.0. Standard doesn’t show it.
• What every paid plan adds: 1080p and 4K generation, brand watermark removal, commercial use of what you generate, daily free credits for subscribers, unlimited task queueing and faster generation.
• Yearly billing: Standard is $79.20 a year and Pro $293.04 a year (34% off list), and Premier starts at $1,490 for the first year.
• What changed since our last update: the old Premier plan ($80.96 a month for 8,000 credits) and Ultra ($159.99 for 26,000) are replaced by the new Premier and Ultra+ tiers above. Standard and Pro prices are unchanged.

Kling 4.0 discount: on October 23, the membership page still shows “Kling 4.0 Available Now! Get 10% Off with Pro or Higher”, with a countdown that points to the offer ending around October 29.

Kling 4.0 API pricing (preview)

Kling has now added Kling 4.0 to its API price list, but marks it “Coming Soon”: API access isn’t open yet, so these are the announced rates, not something you can buy today. API billing uses units, with 1 unit at about $0.157.

Kling 4.0 API mode	720p	1080p
Text or image to video (no video input)	1 unit ($0.157) per second	1.5 units ($0.235) per second
With video input (edit or reference)	0.6 units ($0.094) per second	0.9 units ($0.141) per second
Kling 4.0 Flash	Not announced	Not announced

At these rates, a 10-second 1080p clip would cost about $2.35 through the API, and a full 30-second 1080p clip about $7.05. That’s more than Kling 3.0 on the same page, which lists $0.084 to $0.168 per second, so Kling 3.0 is still the cheaper choice for bulk API work until Kling 4.0 Flash pricing is out.

Is Kling 4.0 free?

Not in the sense of free generations. Kling 4.0 is open to every account, but it uses credits, and the membership page we checked lists only paid plans, from Standard at $6.99 for the first month. If you want to try AI video without paying, see our list of free AI text to video generators.

What Kling 4.0 is likely to cost in credits

Kling hasn’t published Kling 4.0 credit rates on its public pages. For reference, Kling’s native 4K release note for Kling 3.0 lists 30 credits per second, which works out to 900 credits for a 30-second 4K clip. At October 19 prices, 900 credits cost about $9.54 on Standard and about $6.39 on Ultra+. Kling 4.0 rates may differ, so treat this as a rough guide.

Is Kling 4.0 worth it? Standard at $8.80 a month is the cheapest way in, but 660 credits won’t go far with 30-second clips. For regular Kling 4.0 work, Pro gives you 3,000 credits plus the 10% Kling 4.0 discount, which makes it the more practical starting point.

Best use cases for Kling 4.0

• Short films and ads: 30-second single-pass clips with keyframes for structured multi-shot sequences.
• Trend replication: upload a trending clip as a reference, add your own assets and keep the same pacing and camera moves.
• Product videos: product swaps and reveals with keyframes and image references.
• Multilingual content: on-screen text and dialogue in 9 languages, with regional accents.
• Cinematic work: 4K, 10-bit HDR and 21:9 ultrawide for footage you plan to color grade.

Limitations

• Credit costs aren’t public: Kling hasn’t listed how many credits Kling 4.0 or Flash use per second.
• Some features are coming soon: Kling lists native 4K and 1080p in 10-bit HDR, and video extension up to 2 minutes, as coming soon.
• Flash is limited: it’s capped at 720p and 20 seconds, in 8-bit SDR, with no keyframes.
• Paywalled quality: 1080p and 4K generation, watermark removal and commercial use need a paid plan.
• Promotions change fast: the 10% Kling 4.0 discount and first-month offers are limited-time, so check the membership page before you buy.

Kling 4.0 alternatives

• Kling 3.0: our technical review of Kling 3.0 and its API.
• FastH3: a free, open-weight MiniMax H3 model that makes video with sound on your own GPU.
• Seedance 2.0: ByteDance’s video model, reviewed by TechPilot.ai.
• Kling 4.0 vs Seedance 2.5: how Kling’s and ByteDance’s latest video models compare.
• Veo 3.1 vs Sora 2: how Google’s and OpenAI’s video models compare.
• Higgsfield AI: image-to-video with consistent characters and camera moves.
• PixVerse AI: fast AI videos for social media from text or images.
• Pika in ChatGPT: make AI videos right inside a ChatGPT chat with Pika’s new plugin.

Kling 4.0 is a big step up from Kling 3.0: 30-second single-pass clips, up to 10 keyframes and 15 references put it among the most capable AI video models of 2026, and since October 15 every Kling account can use it.

It isn’t free to generate, though. Start on Pro to get enough credits and the launch discount, and wait for Kling’s HDR and 4K output before paying for a top tier for cinematic work.