Kling AI is the umbrella name for the Kuaishou video family: the original Kling 1.0, the 1.5, 1.6, 2.0, 2.1, 2.6 iterations, and now Kling 3. For teams that have not upgraded yet, the older tiers still ship and still produce useful work. This review covers when to pick the older Kling tiers versus jumping straight to Kling 3.
I tested Kling 1.6, 2.1, and 2.6 head-to-head against Kling 3 on the same three prompts.
What is Kling AI?
Kling AI is Kuaishou’s text-to-video and image-to-video model family. The web app at klingai.com exposes every version from 1.6 onwards. Each version has different credit costs, clip lengths, and aspect ratios.
Kling 1.6 and 2.1 are the cheapest tiers and still produce solid 720p output. Kling 2.6 was the immediate predecessor to Kling 3, with 48fps and 1080p. Kling 3 is the current flagship.
The test results
Test 1. Cinematic landscape (cross-version)
Prompt: “Slow drone descent over a misty pine forest at dawn. 5 seconds, 1080p where supported.”
Kling 1.6 produced a clean 720p result with some motion judder. Kling 2.1 cleaned up the judder. Kling 2.6 added the 1080p clarity. Kling 3 took it to 4K and 15 seconds in a single shot. For 5-second 720p work, 2.1 is genuinely fine and burns far fewer credits.
Test 2. Character animation
Prompt: “A young man in a beige coat walking through a Parisian street market.”
Identity preservation has improved with each release. Kling 1.6 produced two takes where the man changed coat colour mid-clip; 2.1 and beyond locked the coat correctly. Kling 3 holds across longer multi-shot prompts.
Test 3. Aspect ratio + style preset
Prompt: “Same prompt as test 2, but vertical 9:16 with "cinematic" style preset.”
Kling has always had strong style and aspect controls. The cinematic preset on 2.6 produced film-grade colour and contrast across all three older tiers. For social content where you need vertical output with a consistent look, older Kling versions remain reliable.
When to use older Kling versions
Budget production. Kling 1.6 and 2.1 cost far fewer credits per clip. For volume work where 720p is enough, the older tiers are the right call.
Specific style presets. Some Kling 2.x style presets have not yet been ported to Kling 3. If your brand is committed to a specific preset, stay on the version that ships it.
Image-to-video. Older Kling image-to-video has been refined for two years and is rock solid. Kling 3 image-to-video is better but the marginal improvement does not always justify the credit cost.
Is it worth the price?
For most production teams, Kling 2.6 at half the credit cost of Kling 3 is the sweet spot. Free tier on klingai.com covers daily exploration.
How Vuela.ai fits into a Kling workflow
Vuela.ai exposes Kling-class generation in the flat catalogue. You do not pick a Kling version manually; Vuela picks the right tier per shot based on length, resolution, and budget.
Audio, cloning, translation, and repurposing all happen inside Vuela on top of the Kling output.
Kling-class video with the rest of the pipeline
Vuela.ai gives you Kling-class generation plus cloner, translator, audio, and 70+ tools on one flat plan.
The verdict
Kling AI as a family is the most battle-tested AI video pipeline available in 2026. Pick the version that matches your output spec; jump to Kling 3 when the 4K and 15-second length are necessary.
For a workflow that picks the right Kling version automatically, use Vuela.ai.