Kimi is free to use for everyday chat, with limits. The open Kimi K2 weights are free to run yourself, and only the developer API is billed by usage.
1. Is Kimi free? The short answer
Yes, Kimi is free to use for normal chat. You can open the app or website, sign in and ask questions without paying, in the same way you would use the free tier of most AI assistants.
It helps to see Kimi as three separate things. The consumer assistant at kimi.com is free with usage limits. The Kimi K2 models are open weights, so they are free to download and run on your own hardware. The developer API at platform.kimi.ai is the paid part, billed by how much you use it. Which one is free depends on which one you mean.
2. What you get without paying
Most people who ask if Kimi AI is free only need the app, and that costs nothing to start.
The Kimi app and website
The Kimi assistant at kimi.com and the mobile app are free to use. You create an account, then chat, upload files and use its long context without a subscription, seen August 2026. For everyday questions, writing help and reading long documents, the free product is usually enough.
As with any free tier, expect fair-use limits rather than unlimited access. Heavy use in a short time, or use during busy periods, can slow you down or cap how much you can send. Check the current limits in the app, because providers adjust them often.
The open-weight Kimi K2 models
The Kimi K2 line was released as open weights, which is the main reason Kimi spread so widely. Open weights mean you can download the model and run it yourself, so the licence to use the model is free even though you still pay for the hardware or cloud that runs it.
This matters for developers and cost-sensitive teams who want to avoid being locked to one provider. Grok, by contrast, is not offered as a downloadable model, so this particular kind of free access is specific to the open Kimi models.
Kimi is free the way most assistants are free: the app costs nothing within limits, while the API you build on is billed by usage.
3. What actually costs money: the Kimi API
The paid part of Kimi is the developer API. If you are building software that calls Kimi, you use platform.kimi.ai, which is pay-as-you-go with no monthly subscription, seen August 2026. You are billed per token, meaning per chunk of text sent and received.
Reported figures for the flagship model put it near USD 3 per million input tokens and USD 15 per million output tokens, with a lower rate for cached input. Treat those as reported, not confirmed, and check the live numbers at platform.kimi.ai before you budget, because model names and prices change.
4. Kimi free tier limits to expect
A free tier is not the same as unlimited. Kimi's free app access comes with the usual trade-offs, so it is worth knowing them before you rely on it for anything important.
Expect caps on how many messages or how much context you can use in a period, slower responses at peak times, and no service guarantee. The free app is built for personal use, not for powering a product or a team workflow. If you need guaranteed capacity or higher limits, that is where the paid API or self-hosting comes in. Always confirm the current limits on the official pages, since they are adjusted without notice.
5. Is Kimi free compared with Grok, ChatGPT and Gemini?
On the free question, Kimi sits in the same place as the others. Grok, ChatGPT and Gemini all offer a free tier with limits plus paid plans for more use, and Kimi does the same with its free app and paid API.
The real difference is the open weights. You can self-host Kimi K2, which you cannot do with Grok, ChatGPT or Gemini. So if free and self-hosted matters to you, Kimi has an option the others do not. For a side-by-side view of the assistants, see the Grok vs Kimi comparison, and if you are weighing Grok's own free access, read whether Grok is free.
6. How to use Kimi for free, and when paying makes sense
For free use, open kimi.com or the app and give it one real task to see if it fits your work. That path stays free within the usual limits and needs no card.
Pay only when the free route runs out. If you are shipping software, the pay-as-you-go API is the route, billed by usage. If you want full control or predictable cost at scale, running the open K2 weights yourself is the alternative. Whichever you pick, verify current model names, limits and prices on the official pages first, because AI product pages change quickly and third-party guides go stale.