Updated on
Kimi: reviews and analysis
Moonshot's assistant with a million-token context window.
Affiliate link · no extra cost to you
Our verdict
Kimi now plays in the same league as the big names and has stopped being the cheap option: its plan starts at $19, one dollar under ChatGPT or Claude. Where it does win is the free tier, the best in its class, and the million-token context for document work. The trade-off is that personal data is stored in mainland China and excluding it from training requires a support request.
Best for: People who read and summarize long documents daily and want a free tier that survives real use.
What changed this week
Sweep of
No axis movement: the 20 July new-signup freeze is still the same fact, not a new one, and the $19 price is confirmed literally on the official site. The privacy policy now names mainland China storage, a nuance inside the existing con, not a fact that moves the axis.
- no change
- no change
We have tracked it since July 25, 2026: 3 sweeps on record, with the score moving between 3.7 and 3.8. We publish the latest change here; the full series is not published.
What the internet says
The network still reads Kimi K3 as strong on long research and open weights, but new account sign-ups remain frozen since 20 July with no reopening date, and the entry price and conversation privacy complaints are unchanged.
What the web repeats in favour
- Frontier-level quality on long research and documents, still the most praised feature in app store ratings
- K3 weights have stayed open since 27 July, so anyone with hardware can host it and skip the vendor's cloud
- The free plan still allows basic chat without consuming credits, something the big three do not match on their free tier
What the web repeats against
- Three weeks after the 19 July cutoff, Moonshot's own notice still says new plans are not available for purchase, with no opening date
- The one million token context still requires the top tier per official documentation, the entry plan is left with the short window
- The entry plan is still $19 a month, essentially what the big three charge, and app store reviews say that price pushes them toward cheaper API alternatives
- The data policy admits using conversations for training, now does name mainland China as the storage location, and opting out means emailing support and waiting up to 30 days with no per-conversation setting
- Prices still differ by market under the same plan label, so the plan name tells you neither the cost nor which rung it occupies
Sweep sources: Official pricing · Docs · Docs · App stores · Communities · Press
Pros / Cons
Pros
- Free plan with uncapped basic chat
- One-million-token context for long documents
- Top-tier research reports
Cons
- Costs almost the same as ChatGPT, Claude or Gemini
- Data sits in mainland China. Training opt-out requires support and can take 30 days
- The long context only unlocks on the higher plans
TLDR: Kimi is the general-purpose assistant from Moonshot AI, the Chinese lab whose K3 model now competes with the best of OpenAI and Anthropic. The house specialty is long context, a full million tokens, paired with a free plan that allows basic chat with no message cap. The surprise is on the invoice: the subscription starts at $19 a month, roughly what the big three charge, so anyone arriving in search of the cheap Chinese alternative is in for a letdown.
What Kimi is and how it works
Kimi is the conversational assistant built by Moonshot AI, a Beijing company founded in 2023 that made its name exactly where everyone else was weak, swallowing huge documents without losing the thread. That first version handled 128,000 tokens when the rest of the field sat around 8,000, and that head start still shapes the whole product.
The current model is Kimi K3, announced on 16 July 2026. It is a mixture-of-experts architecture with 2.8 trillion parameters and a one-million-token window, and Moonshot did not oversell it at launch: the company admits K3 sits behind the frontier models from Anthropic and OpenAI on its own evaluation suite, while beating everything else it measured. On the public frontend code arena it did take the top spot on launch day.
For the user it is a chat box with the usual parts of a modern assistant: deep research, file reading, vision and an agent mode. Moonshot has added Kimi Work, a desktop app for Mac and Windows that operates on your local files, and it maintains Kimi CLI as the sibling product for people who code in the terminal.
What it’s like to use day to day
Kimi pulls away from the pack on long document work. Handing it a two-hundred-page contract or a full transcript and asking for a synthesis with internal references is the job it was designed for, and app store ratings point the same way: what recurs most among people who score it highly is the quality of its research reports.
The learning curve is the one every assistant has, which is to say none. You type, it answers. The friction shows up elsewhere. First, availability: on 19 July 2026, three days after launching K3, Moonshot suspended new sign-ups because demand outran its compute capacity, and it has been reopening spots in batches since. If you decide to pay, you may have to wait your turn.
The second sits between what the model promises and what your plan delivers. The million-token window, the product’s headline argument, only opens up from the $99 plans upward. On the entry tier you work with a considerably shorter one, and it pays to know that before subscribing on the strength of the headline.
The third is flagged by independent analysis and matches what you read in the forums: chaining tools as a conversation grows is still the weak spot, and the model spends a lot of reasoning even on simple questions. For chat and documents it delivers. For long unsupervised automation, you still have to watch it.
Pricing and plans
Kimi runs on a permanent free plan plus a subscription from $19 a month. The free tier is among the most generous available right now: basic chat with no message cap, on the previous model generation, which also consumes no credits. If your use is asking questions and summarizing text, you can stay there without paying. Agent credits are tightly capped, and the most repeated complaint in store ratings is that this free layer used to be wider.
From there the tiers climb in big steps up to three-figure plans, and what each jump buys is agent credits, parallel tasks and access to the long context. Annual billing lowers the monthly rate.
Here is the number that changes the decision. The big three price their consumer plan at around twenty dollars a month and Kimi starts at nineteen. The gap is one dollar, so Moonshot’s assistant is not the budget pick against ChatGPT, Claude or Gemini, it is another option at the same price. The real saving lives behind two different doors: the free tier, which does beat all three, and the per-use API price. People expecting rock-bottom rates were thinking of earlier Kimi generations, because K3 is the most expensive model any Chinese lab has released to date.
What happens to your conversations
Kimi says in its Help Center that it may use de-identified inputs, instructions and responses to train its models. It also confirms that consumer-product data is stored on servers in mainland China. The free chat can therefore help improve the product, but accepting that use is not mandatory if you want to keep using it.
Opting out is not a toggle. You must contact support, and Moonshot allows up to 30 days to process the request. Once applied, it excludes both historical and future conversations without removing product features. Kimi Business separates enterprise workspaces and does not train on their data.
Who it’s for (and who it isn’t)
Kimi fits if your job means reading a lot and summarizing with judgment: document analysis, market research, review of long reports, case file preparation. It also fits if you want a capable assistant for nothing, because its free plan absorbs real usage that other tools cut off after a handful of daily messages.
It does not fit if you handle information subject to jurisdiction requirements and cannot accept storage in mainland China. For client data, medical records or legal material, the location and an opt-out process that can take up to 30 days outweigh any technical advantage. Teams able to self-host K3’s open weights on their own hardware solve the problem another way.
It also isn’t the pick if you need the assistant wired into your work suite, or if you plan to delegate long tool chains without checking the output.
Alternatives to Kimi
The same price gets you the usual three, and the comparison is fought hand to hand: ChatGPT on ecosystem and feature breadth, Claude on judgment in long text, and Gemini if you already live inside Google. The detail sits on Kimi alternatives. For assistants that bundle several models under one account there is YesChat, and if your real problem is finding information rather than writing it, the paid search engine Kagi. The full set is in our guide to the ai assistants.
Frequently asked questions
Is Kimi free?
It has a permanent free plan with basic chat and no message cap, which is plenty for asking questions and summarizing. What runs out fast is agent credits. Paid subscriptions start at $19 a month.
Which model does it run right now?
Kimi K3, released on 16 July 2026, with a one-million-token context window. That full window is only on the higher plans rather than the entry tier, which is the small print that catches most people out.
Is it cheaper than ChatGPT or Claude?
Not on the subscription, which starts at $19 against roughly twenty for the big names. It wins on the free plan and on the per-use API price.
Can I give it confidential documents?
Better not on a personal account. Moonshot states that data is stored in mainland China, and opting out of training requires a support request that can take up to 30 days. For third-party data, use Kimi Business under its own terms or infrastructure you control.
Is this the same as Kimi CLI?
No. Kimi CLI is the terminal agent for coding, aimed at developers. This review covers the general-purpose assistant for chat, documents and research.