Kimi AI – Unofficial Web Chat & English Resource Hub

Kimi AI is an advanced AI chatbot developed by Moonshot AI – known for its huge context memory and coding skills. Chat with Kimi to get answers, write code, or brainstorm ideas in natural language.

Unofficial site – not affiliated with Moonshot AI.

Official Site | Developer API

• What is Kimi AI? An AI chatbot assistant developed by Chinese company Moonshot AI in 2023. It’s notable for handling extremely long inputs (hundreds of pages of text) and strong coding capabilities out of the box.
• Who runs this site? Not Moonshot AI. This is an independent, unofficial web client and English guide for Kimi AI. We provide a convenient chat interface and info – but we are not affiliated with Moonshot AI or its owners.
• How to use Kimi AI? You can access Kimi through the official web app, the iOS/Android apps, or via a developer API key. (This site lets you chat directly on web – no installation needed.)
• Modes of use: Kimi offers multiple modes for different needs – Instant Mode (quick replies), Thinking Mode (slower, in-depth reasoning), plus advanced Agent modes where it can use tools autonomously (including an experimental Agent Swarm for parallel tasks).
• Key features: Kimi supports massive context (up to 128k+ tokens), can handle images/videos as input (multimodal) in its latest version, excels at coding assistance, and works in English or Chinese (among other languages).
• Cost: Basic chat is free (with reasonable rate limits) on the official apps. Power users can upgrade via paid plans (Moderato, Allegretto, Vivace) for higher usage, faster responses, and beta features.
• Privacy & safety: Conversations are stored on Moonshot’s servers. Content may be used to improve the AI and disclosed to authorities if required, so avoid sharing sensitive info. Kimi has strict content filters – it won’t produce disallowed or harmful content, and may refuse certain requests to maintain safety.

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What is Kimi AI (and Who Makes It)?

Kimi AI is an artificial intelligence chatbot and a series of large language models created by the Chinese tech company Moonshot AI. First launched in late 2023, Kimi quickly gained attention for its ability to handle extremely long text prompts (up to 128,000 tokens, far more than most AI at the time). In other words, it can read and remember hundreds of pages of content in one session, making it ideal for in-depth research or lengthy conversations.

Moonshot AI – an AI startup backed by Alibaba – has continuously improved Kimi since its debut. Over 2024–2025, they released upgraded models like Kimi K1.5 and Kimi K2, and introduced new capabilities such as web search and “context caching” for efficient long conversations. In January 2026, the latest flagship model Kimi K2.5 was released, boasting approximately 1 trillion parameters and native support for multimodal inputs (it can understand images and even video). Kimi K2.5 also brought advanced “agentic” features, meaning the AI can autonomously use tools (like web browsers or code interpreters) to complete complex tasks.

Importantly, Kimi AI is a product of Moonshot AI – but this website is not. We are an independent fan-made platform providing an English-language web client and resource hub for Kimi. We built this site to help English-speaking users learn about and experiment with Kimi AI.

We have no official affiliation with Moonshot AI or its partners. (Think of us like a helpful guide – similar to how there are unofficial client apps for OpenAI or other services.) Our goal is to make Kimi more accessible by providing documentation, tips, and a ready-to-use web chat interface in one place.

How to Use Kimi AI (Web / Mobile / API)

Using Kimi AI is straightforward, whether you prefer a web browser, a mobile app, or integrating it into your own software. Below are simple steps for each method:

On the Web

1. Visit a Kimi chat website: You have two main options – the official Kimi website (kimi.com) or an unofficial web client (like this site). The official site is run by Moonshot AI and may require you to sign up or log in. This unofficial site lets you start chatting directly as a convenience (no login required here).
2. Enter your prompt: Once you’re on a Kimi chat page, you’ll see a chat box. Simply type a question or prompt (in English or Chinese) and hit send. For example, you can ask, “Give me a quick summary of the Moon landing.”
3. View the response: Kimi will generate a reply live. In Instant mode, this usually happens within a second or two. If you use Thinking mode (an option for more complex queries), it might take a bit longer as Kimi “thinks” through the steps.
4. Continue the conversation: You can ask follow-up questions or clarify requests in a threaded conversation. Kimi remembers the context of up to ~100k+ tokens, so feel free to have a detailed discussion or analyze large text – it won’t easily forget earlier parts of the chat.

(Tip: On the official Kimi site, you might have additional features like uploading files or switching modes. On our unofficial client, we aim to support core features via the API. Check our How to Use guide for detailed tips.)

On Mobile (iOS/Android Apps)

1. Download the app: Moonshot AI provides official Kimi AI apps for both iOS and Android devices. You can find them on the App Store and Google Play by searching for “Kimi AI”.
2. Sign up or log in: Open the app and create a free account (you may need to provide an email or phone number) if you haven’t already. Log in with your credentials.
3. Start chatting: The mobile app interface is similar to other chat apps. You’ll see a chat input – type your question or message and send. Kimi will reply in the chat thread. You can use voice input or attachments if the app supports those features.
4. Explore app features: The Kimi app may offer mode switching (e.g., toggling between Instant and Thinking mode), conversation history, and possibly unique features like “Kimi Explore” (autonomous web search) depending on the version. Make sure to update the app to get the latest model (K2.5) and features.

(Note: Using the official app has the same rate limits as the web – basic usage is free. If you hit limits, the app might prompt you to upgrade to a paid plan. Also, keep in mind that the app is subject to Moonshot’s terms of service just like the web platform.)

Via API (Developer Access)

1. Get an API key: Yes, developers can integrate Kimi AI into their own applications via the Moonshot AI Open Platform. To do this, sign up on the official developer portal (platform.moonshot.ai) and obtain an API key or access token. Registration might involve providing some personal or business details.
2. Use the API endpoint: Moonshot’s API is designed to be compatible with OpenAI’s ChatGPT API format. This means you can use a similar JSON request structure. The base URL and model name will be specific to Kimi (for example, using the Kimi K2.5 model endpoint). Moonshot provides documentation and even an OpenAI/Anthropic-compatible interface for ease of integration.
3. Choose your mode and model: In your API calls, you can specify parameters to use Thinking mode or Instant mode. By default, the API might run in Thinking mode; to use Instant, you include a special parameter ("thinking": false) in the request. Also choose which model version you want (e.g., kimi-k2.5 or a lighter model if offered).
4. Integration and testing: With your API key and requests set up, you can now call Kimi from code (Python, JavaScript, etc.). For example, you could build a Slack bot or a customer service chatbot backed by Kimi. Monitor your usage – the API will enforce rate limits or charges if you exceed free quotas.
5. Costs: The developer API may incur costs beyond a free tier. Moonshot’s pricing (as of latest info) is competitive – on the order of $0.60 per million input tokens and $2.50 per million output tokens, with discounts for re-used content via context caching. Be sure to check the latest pricing on the platform, as it can change, and higher tiers (paid plans) might unlock faster model versions or more capacity.

Models & Modes (Instant, Thinking, Agent, Swarm)

Last updated: 2026-01-31

Kimi AI isn’t a single static model – it’s an evolving family of AI models, with multiple modes of operation for different tasks. Here’s a quick overview of Kimi’s model versions and the user-selectable modes:

Model versions: The core AI engine behind Kimi has improved over time:

• Kimi 1.0 (2023): The first release of Kimi’s model, based on Moonshot’s proprietary LLM. It surprised the industry with support for a 128k token context window (meaning it could handle extremely long prompts).
• Kimi K1.5 (early 2025): An upgraded model ~20B parameters (estimate) with better math, coding, and a slightly larger context. Moonshot claimed Kimi K1.5 matched the performance of some OpenAI models in certain areas like coding.
• Kimi K2 (mid 2025): A major leap – a trillion-parameter class model (Mixture-of-Experts architecture) which Moonshot open-sourced under a permissive license. K2 delivered state-of-the-art coding performance among open models and introduced “agentic” capabilities (tool use).
• Kimi K2.5 (Jan 2026): The current flagship model. It has ~1 trillion parameters (with 32 billion active at a time) and is multimodal, meaning it can process images and text together. K2.5 improved reasoning and introduced the parallel “Agent Swarm” concept. If you’re using Kimi via the official chat or this site today, you’re likely talking to Kimi K2.5.

Conversation modes: Regardless of the underlying model, Kimi offers different modes that change how it responds. You can think of these like settings for its “thinking style”:

• Instant Mode: Fast and to-the-point. In Instant mode, Kimi generates answers quickly without extensive step-by-step reasoning. Use this for casual questions, quick facts, or simple tasks where speed matters. The trade-off is that it might not delve deeply into a complex problem. (Behind the scenes, Instant mode runs with a lower “thinking” parameter – e.g., temperature ~0.6 – which makes responses more direct and faster.)
• Thinking Mode: Slow but thorough. In Thinking mode, Kimi will take extra time to reason through the question internally. It may produce a more detailed answer, show its step-by-step logic, or handle complicated multi-part queries better. Expect a bit of a delay (several seconds for hard problems) while it “thinks.” This mode is great for math problems, detailed analyses, or anything where you want Kimi’s full reasoning.
• Agent Mode: Tool-using autonomous mode. In Agent mode, Kimi can act like an autonomous agent: it might perform multi-step actions like searching the web, executing code, or generating content in stages to achieve a goal. For example, Moonshot showcased Agent mode with features called “OK Computer” that let Kimi build simple websites or slide presentations automatically. Essentially, Agent mode lets Kimi go beyond just Q&A – it can take actions to fulfill your request (within a controlled sandbox). This mode is powerful for complex tasks (e.g. “Research this topic and draft a report”).
• Agent Swarm Mode: Multiple agents in parallel. This is an experimental mode (currently in beta) where Kimi spawns a swarm of sub-agents to tackle a big task together. Imagine Kimi breaking a problem into parts and having several AI agents work on each part simultaneously, coordinated by a main AI. This can potentially solve large problems faster, by parallelizing the work. For instance, if asked to analyze 100 documents, a swarm could divide the docs among agents. Agent Swarm is cutting-edge and not always enabled; when available, it’s mainly for heavy-duty analysis or enterprise use cases.

Which mode should you use? For most day-to-day chats, Instant mode is sufficient (and saves time and computing resources). If you notice Kimi struggling or giving shallow answers on a complex query, switch to Thinking mode to get a more reasoned response. Agent mode is for when you need Kimi to perform tasks autonomously (like searching or coding) beyond just answering; it may be accessible via special prompts or buttons in the interface (e.g., “Let Kimi Solve This”). And Agent Swarm is a specialized option you’ll use rarely – it’s impressive, but only needed for very complex tasks (and it might be limited to paid tiers or developer settings for now).

(We keep this section updated with the latest on Kimi’s models and modes. Last updated: 2026-01-31. For any major model releases or new modes, we’ll update the info here.)

Key Features of Kimi AI

Kimi AI stands out from other chatbots thanks to several key features and capabilities. Here are the highlights that users care about most:

• Extremely Long Memory: Kimi can handle very long conversations or documents without losing context. It was the first AI model to support an input size of ~128,000 tokens (around 100k English words). In practical terms, you could paste an entire book or a large codebase into Kimi, and it can analyze or discuss it in one go. This long-context ability means Kimi is great for tasks like reviewing lengthy reports, summarizing massive documents, or multi-turn dialogues that span a lot of information.
• Multimodal Input (Text + Images): The latest Kimi model (K2.5) is multimodal, meaning it doesn’t just read text – it can also interpret images and possibly videos. You can ask Kimi to analyze a picture (for example, “What’s in this image?” or “Read this diagram”) and it will attempt to understand visual content. This makes Kimi capable of tasks like reading charts, doing OCR, or describing images. (Video support is in early testing, so expect text and images to be the main focus for now.)
• Coding and Tool Use: Kimi is designed to be developer-friendly and agentic. It can generate well-structured code in multiple languages (Python, Go, JavaScript, etc.) and solve coding problems – in fact, Kimi’s open-source models have achieved top-tier results on coding benchmarks. Uniquely, Kimi can also use tools autonomously: it can decide to run a web search, call an external API, or execute code as part of answering your question. For example, if you ask Kimi to analyze data, it might internally write and run a snippet of code. This tool-use capability means Kimi isn’t limited to its trained knowledge; it can perform actions to get new information.
• Multiple Languages: Kimi AI is proficient in English and Chinese (the languages it was primarily trained on) and can communicate in many other languages to varying degrees. English users will find Kimi’s responses fluent and idiomatic. It can also translate between languages or help you draft text in, say, Spanish or French, although its accuracy is highest in English/Chinese. In essence, Kimi is a multilingual AI, making it useful for global users – a big plus especially for our target audiences in the US, UK, Malaysia, Europe, etc.
• Autonomous Reasoning Abilities: Thanks to its Thinking and Agent modes, Kimi can carry out multi-step reasoning better than a typical one-turn chatbot. In Thinking mode, it will break down problems and even show its step-by-step thought process. In Agent mode, it can plan a sequence of actions (like a mini workflow) to accomplish a goal. This makes Kimi very powerful for complex tasks – for example, researching a topic across the web and compiling an answer, or debugging code by repeatedly testing and refining. Users who need more than a quick answer – who want an AI that can **“figure things out” systematically – will appreciate these capabilities.
• Constantly Evolving: The team at Moonshot AI is actively updating Kimi with new features and improvements. In just a year, Kimi went from version 1.0 to K2.5, adding huge upgrades like longer memory, better reasoning, and vision support. This rapid development means Kimi is closing gaps with (or even surpassing) Western models in certain areas. As a user, you can expect regular updates that improve quality, add knowledge (Kimi’s knowledge cutoff is continually extended), and introduce new tools. We’ll note major updates on this site.

(In summary, Kimi AI’s standout features include its long context window, ability to handle images, strong performance in coding and logical tasks, multi-step autonomy, and bilingual versatility. It’s essentially a cutting-edge general-purpose AI assistant with a growing toolset.)

Safety, Privacy & Data Handling

Using an AI assistant means trusting it with your prompts and possibly personal data. Kimi AI has some important safety and privacy considerations you should know:

Content Safety: Kimi has built-in content moderation filters to prevent misuse and to avoid generating harmful content. The AI will refuse to engage with requests that violate its guidelines – for example, instructions to produce hate speech, explicit violence, or other disallowed material will be blocked. In fact, Kimi is known to have a strict moral compass in its responses. For instance, users have found that Kimi may politely refuse even relatively mild requests if they seem ethically questionable or aggressive. This makes Kimi a safe choice for workplaces and schools (it’s unlikely to produce inappropriate answers), but it can sometimes feel overly cautious. Please be mindful of the prompts you give: if you get a refusal, it’s because the system decided the request fell outside acceptable bounds. In general, stay within common-sense limits (no illicit, extremely violent, or highly sensitive requests) and you’ll have a smooth experience. Also, note that like any AI, Kimi is not 100% error-free – it may occasionally output incorrect information (AI hallucinations) or make mistakes. Always double-check critical facts. We encourage users to use Kimi as a helpful assistant, but not as an infallible oracle.

User Privacy: By using Kimi (whether via the official app or this web client), you are sending your data to Moonshot AI’s servers, which are primarily cloud servers (reportedly hosted in places like Singapore, with backups in other regions). Moonshot’s privacy policy states that they collect and store your conversations and may use that content to “develop and improve” their services. In plain terms, your chats aren’t private – the company can review them, and they likely feed anonymous versions of them into model training to make Kimi smarter over time. Moreover, Moonshot reserves the right to access, preserve, or disclose any information if needed to comply with legal obligations or government requests. Since Moonshot AI is based in China, be aware that Chinese law (e.g. the Data Security Law) can compel them to share data with Chinese authorities on request, even if you’re an international user. While there’s no evidence of routine surveillance, you should avoid sharing sensitive personal data, confidential business information, or anything you wouldn’t want to potentially be seen by others. Treat your Kimi conversations as semi-public.

Data Handling on This Unofficial Site: We understand privacy is a big concern, and we want to be transparent. This website (kimi-ai.chat) does not require you to create an account or provide personal details to chat. We act as a client that relays your prompts to the official Kimi API and delivers the responses back to you. We do not permanently store your chat transcripts on our servers, nor do we use them for any purpose beyond facilitating your current session. However, keep in mind that the data still passes through Moonshot AI’s systems. In other words, using this site doesn’t bypass Moonshot’s data collection – it just provides a convenient interface. For full details on what data might be logged, see our Privacy Policy and Disclaimer. If you have extreme privacy requirements, consider exploring Moonshot’s open-source releases (like Kimi K2) which you can run on your own hardware – that way, no data leaves your environment. But for most users, the key point is: don’t input secrets or personal identifiers into any cloud AI service, including Kimi.

Security Measures: On a positive note, Moonshot AI does implement industry-standard security for their services. Data in transit is encrypted (HTTPS), and they claim to use secure storage and encryption for user info. Also, our site uses HTTPS and does not expose your data to other users. We strongly advise using a strong unique password for your Moonshot account (if you make one on the official site/app) and enabling any available security features. We will never ask you for your login credentials here. If you encounter any suspicious behavior or have privacy concerns, please reach out via our contact info on the Privacy Policy page.

In summary, use Kimi responsibly. The AI is designed with safety rules to prevent harmful output. From the privacy side, be aware that your chats are saved and subject to oversight – both by the company and potentially by government agencies if legally required. We believe in transparency, and we hope this clarity helps you make an informed decision about how to use Kimi AI.

Official Links vs. This Website

It’s important to distinguish between official Kimi AI platforms and our independent website. Here are the key differences and links:

• Official Kimi AI Services (Moonshot AI): These include the official website (kimi.com) and the official mobile apps (“Kimi” on iOS App Store and Google Play). The official services are developed and maintained by Moonshot AI, the company that created Kimi. They require a Moonshot account to use, and your chat data goes directly to Moonshot’s servers. Official platforms may have the latest features (e.g. new model releases, experimental tools) first. If you need customer support or encounter account issues, you should refer to Moonshot AI’s official support channels.
• This Website (kimi-ai.chat): This is an unofficial, third-party web client and guide. We built it to help users who want an easy way to try Kimi AI in English and find information in one place. We do not have any special relationship with Moonshot AI. We simply call the public Kimi API behind the scenes. Think of our site as a friendly layer on top of the official service – it’s like using a third-party email app to access an email service. All core AI functionality still comes from Kimi’s servers; we provide the interface and explanatory content. Because we’re unofficial, we might not support every feature the official apps have, and if Moonshot changes the API, our service might be affected. Always check the official site if you suspect a feature discrepancy.
• Data & Privacy Differences: When you use the official site or apps, you’re directly agreeing to Moonshot AI’s terms and privacy policy. When you use our site, you’re still subject to Moonshot’s terms (since their service is being used), and additionally to our site’s Privacy Policy and Disclaimer. Practically, any chat you make here is still processed by Moonshot’s servers (and subject to their data handling as described above). The difference is that we (the unofficial site) do not keep your personal data or chat logs longer than necessary to serve you. We also don’t require login. If you prefer not to involve a third-party site at all, you can always use the official Kimi channels directly.
• Feature Availability: Official platforms might roll out new models (like a hypothetical Kimi K3 in the future) or special modes (like new Agent tools) sooner. We do our best to update our interface to support new capabilities via the API. For example, if Moonshot enables an “image upload” feature in the API, we’ll aim to support it here. However, some experimental features (like certain agent abilities or premium tools) might remain exclusive to official apps or certain paid tiers. Our focus is on providing the core chat experience and essential modes in a simplified way.
• Community & Support: This unofficial site is also a community resource. We provide FAQs, usage guides, and tips that you might not find in the official documentation. We welcome user questions and feedback (see the FAQ and our contact links). Official Kimi support will not assist with issues on this site specifically, since they don’t run it. If you have a problem with the AI itself (like a model error), that would likely be the same across both platforms and is due to the AI – in those cases, you might discuss it in public forums or the official Kimi user community. But if it’s something like “the unofficial site is down” or “feature X isn’t working here,” that’s on us – check our site updates or reach out to us directly.

In short, use the official Kimi AI site/apps for the authoritative experience, especially if you intend to subscribe to a plan or need guaranteed support. Use this unofficial site for convenience, quick access, and rich English-language guidance. We encourage trying out the official links below as well as using our resources here:

• Official Kimi Website – Moonshot’s main web chat platform
• Official Kimi Mobile Apps – iOS and Android apps by Moonshot AI
• Moonshot AI Open Platform – developer portal for API access

(Note: We have provided these references for completeness – again, we are not affiliated with or endorsed by Moonshot AI. Always exercise caution and ensure you’re using official sources when signing up or downloading software.)

FAQ (Frequently Asked Questions)

Below we answer some common questions about Kimi AI. These quick Q&As are here to help address the “People Also Ask” queries you might have.

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