Kie.ai
Kie.ai is a single API for calling video, image, music and chat AI models with one key. It runs on pay as you go credits that do not expire, does not charge for failed tasks and offers free credits to test. It is aimed at developers and coding agents building media features into apps.
You want to try Kling for video, Flux for images and a Claude model for text, and you do not want three accounts, three bills and three sets of docs. Kie.ai puts hundreds of AI models behind one API key, with one credit balance that pays for all of them.
Its market lists more than 600 price points across chat, video, image and music models from companies such as ByteDance, Kling, Black Forest Labs, Wan and Anthropic. Each model has its own page with a price table and API docs, and there is a usage log so you can see what each call cost.
It is used mostly by developers and small teams building apps that generate media.
How the credits work
There is no subscription. You top up, and one credit is worth about half a US cent. Each model is billed per image, per second of video, per video or per million tokens, and failed tasks are not charged. Kie.ai shows its own price next to the official or Fal price for each model. As examples, Flux 3 Klein images start at $0.008 and Seedance 2 video starts at $0.057 a second. Prices checked on kie.ai in October 2026.
Before you pay
- Credits never expire, and larger top-ups add bonus credits, for example 10% on a $1,250 top-up.
- Video pricing counts input video too: a 10 second output made from a 5 second clip is billed as 20 seconds.
- After a top-up you can issue invoices with your company details from the billing page.
Kie.ai also runs an affiliate program and posts API updates on its site.
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