How to Use Kimi: The Beginner's Guide (Kimi Chat, K3.1 Pro, Kimi Code, and the Free Line)

CodexFuse Team · 2026-10-29T07:20:39.689Z · 11 min read

Kimi is Moonshot AI's free AI chatbot, famous for reading long documents and helping with code. This beginner's guide shows you how to sign up, pick the K3.1 Pro model, upload files, and understand the free-vs-paid line.

You keep hearing about Kimi — the free AI chatbot from Moonshot AI that people use to read hundred-page documents in one go and debug code without reaching for a credit card — and you want to know how to use Kimi without spending an hour figuring out which button does what. The short version: you can be chatting in about five minutes, because the basic flow is sign up, start a new chat, and check the model picker before your first real question. The one thing that actually confuses beginners is that "Kimi" is not one app anymore — it is a small family of products sharing one name — so this guide starts by showing you which one to open first. If you are new to AI chatbots in general, our Qwen beginner guide is a good companion read, since it teaches the same core habits from another strong free chatbot.

What is Kimi?

Kimi is an AI chatbot built by Moonshot AI, an AI company in Beijing, China. You talk to it at kimi.com or in its mobile app: you type a question or attach documents, and it answers with text, tables, summaries, or code. It became popular because it reads very long documents in a single conversation — its latest models handle a 1M-token context, roughly hundreds of pages at once, and accept images and video as well as text (Simy Kimi reference, checked Oct 29, 2026). The international API is run by a Singapore entity, MOONSHOT AI PTE. LTD., while the China consumer service runs through the Beijing entity (same source).

The name now covers four products, and picking the wrong one is the beginner's first mistake. Use the table below to open the right door.

Beginners should start with Kimi Chat and ignore the rest until they have a reason to care. Everything below is about the chat.

How do you use Kimi for the first time?

You can be chatting in about five minutes. The path is the same in the browser and the app: open the site, make a free account, start a fresh chat, confirm the model, and then ask your first question with enough context for the answer to be useful.

1. Open kimi.com. That is the international site; inside China the same assistant lives at kimi.moonshot.cn — pick whichever loads faster for you (AIToolSteps beginner guide, checked Oct 29, 2026).
2. Sign up for free. No credit card is needed to start. Registration is usually done with a phone number or a supported account, depending on your region (same source).
3. Start a new chat. Use one chat per topic — one for your Python questions, another for the contract you are reading — because it keeps answers cleaner and more focused (same source).
4. Check the model picker. Before your first real question, glance at the model name at the top of the chat. Right now the current model is Kimi K3.1 Pro, launched October 23, and it is selectable in the app (AIToolSteps K3.1 Pro guide, checked Oct 29, 2026). If you only see an older model, refresh or update the app.
5. Tell it your level in the first message. Something like "I am a complete beginner learning to code. Explain everything simply" makes every later answer adjust to you (AIToolSteps beginner guide).
6. Attach something real. Kimi's strength shows when you hand it material — a PDF, a spreadsheet, a screenshot — and give it a specific job, like "Put the key points of this report in a table" (Simy Kimi reference).

Which Kimi model should you pick?

Pick the newest one the app offers you — right now that is Kimi K3.1 Pro. Kimi's model names change every few months, so the durable rule, from the Simy Kimi reference (checked Oct 29, 2026), is to remember them by role rather than by name: "the latest flagship" and "the cheap one for coding."

Two honest caveats. First, testing the wrong model and blaming the new one is a common beginner mistake — confirm the model name at the top of your chat before you judge its answer (AIToolSteps K3.1 Pro guide). Second, if a guide you read names a model that does not exist in your picker, the guide is stale, not your app; model generations turn over every few months.

What is Kimi actually good at?

Kimi's three real strengths are long documents, code, and reading images. If your task is none of those, any good chatbot works — but if it is one of them, Kimi deserves the first try.

Reading long documents in one go

Hand Kimi contracts, research reports, or spec sheets whole instead of chopping them up. Three habits make it far more reliable: say what you want before it reads ("From this contract, pull out only the termination terms and penalties"), ask "Which page says that?" before you trust any number from a summary, and keep one chat per project so older documents do not pollute the answers (Simy Kimi reference, checked Oct 29, 2026). A good first exercise: give it a long report and ask "List three things this document needs us to decide."

Writing and fixing code

Kimi's K3 models are built for coding help: writing code from a plain-English description, explaining confusing code, debugging errors, and reviewing whole files in one chat. Beginners get the best results by being specific — name the language and describe the input and output you expect ("Write a Python program that asks for the bill amount and tip percentage, then prints the tip and the total") — and by asking for comments so the code teaches while it works. When code breaks, paste the full error message back with one sentence about what you expected; the error message is the most important part (AIToolSteps beginner guide, checked Oct 29, 2026). Copy-paste prompt formulas for the teacher, explainer, debugger, project builder, and reviewer roles make a good starting kit.

Understanding images and video

Show it screenshots, diagrams, or short videos and ask it to explain what it sees — "Explain this diagram" is a perfectly good prompt (Simy Kimi reference). This is genuinely useful for error screenshots, charts in reports, and whiteboard photos.

Kimi Code, the terminal branch

Developers who want the Claude-Code-style workflow get Kimi Code: an open-source (MIT) coding agent that runs in your terminal, reads and fixes code, and runs commands. Launch it in the folder you want to work in, log in with /login, state your goal in plain language ("Fix the failing tests"), and — the rule the kimi-ai.free guide stresses for every Kimi agent — review any file edits or commands before you allow them (Simy Kimi reference; kimi-ai.free, both checked Oct 29, 2026).

Is Kimi really free?

Yes, Kimi is free to start: you can sign up at kimi.com and use it with no credit card. The free plan covers everyday beginner use — asking questions, generating code, debugging, reading documents — though like most AI tools it can hit usage limits during peak times (AIToolSteps beginner guide; The AI Journal K3 guide, both checked Oct 29, 2026).

Beyond free, the paid side works like this. The consumer membership is credit-based with four monthly tiers as of October 2026; every tier includes the Kimi K3 family and an allowance for Kimi Code, and prices vary by region and currency, so check the official membership page rather than trusting a screenshot (Simy Kimi reference, checked Oct 29, 2026). The API is a separate, pay-as-you-go instrument — billed per million tokens, with cached input much cheaper — and October 2026 third-party guides cite different per-model rates, so confirm current numbers on platform.kimi.ai before building anything (same source; Webbroi K3 guide). For a beginner, the practical rule is simple: start free, and only pay when you hit the same limit twice in one week.

Kimi vs ChatGPT, Claude, and DeepSeek: which one fits you?

There is no "best" — each is strong in a different place, so match the tool to the job. The Simy Kimi reference (checked Oct 29, 2026) puts it plainly: Kimi's edge is long context plus coding; Qwen's is many languages and models that run locally; DeepSeek's is reasoning with a cheap API; Claude's is careful explanations and thoughtful code review. Many learners end up pairing two of them — Kimi for code and long documents, another for general questions (AIToolSteps beginner guide).

What should you never put into Kimi?

Never put secrets into any AI chatbot, Kimi included. The specifics matter here: Kimi chat data is stored on servers in China and, per Kimi's official help as summarized in the Simy Kimi reference (checked Oct 29, 2026), may be anonymized and used for training — you can ask support to stop that, a process that takes five to seven business days. The API runs through the Singapore entity and states input may be used for model optimization. So the rule is: customer data, unpublished figures, passwords, and anything under NDA stay out of the chat; check your employer's generative-AI rules before using any of these tools for work, and check client contracts for where data may legally sit (same source).

Sources

• Simy Kimi reference — "What Is Kimi K3? Moonshot AI's Kimi, API, Kimi Code" (reference page, specs as of October 2026; checked Oct 29, 2026)
• AIToolSteps — "How to Use Kimi AI for Beginners (Free Guide 2026)" (checked Oct 29, 2026)
• AIToolSteps — "Kimi K3.1 Pro for Beginners: Free Guide (2026)" (checked Oct 29, 2026)
• kimi-ai.free — "Kimi AI Guides: Models, Pricing & Free Access" (product-split guide; checked Oct 29, 2026)
• The AI Journal — "How to Access Kimi K3 Free Web Chat 2026" (checked Oct 29, 2026)

Frequently asked questions

Is Kimi AI really free?

Yes. You can sign up at kimi.com and start using it without a credit card, and the free plan covers everyday use — questions, code, debugging, document reading. Like most AI tools it can hit usage limits at peak times, and the paid membership is credit-based with four monthly tiers (Simy Kimi reference; AIToolSteps beginner guide, both checked Oct 29, 2026).

Who makes Kimi?

Kimi is built by Moonshot AI, an AI company in Beijing, China. The international API is provided by its Singapore entity, MOONSHOT AI PTE. LTD. (Simy Kimi reference, checked Oct 29, 2026).

What is Kimi K3.1 Pro?

K3.1 Pro is the newest model generation announced across Kimi products, launched October 23, and it is selectable in the Kimi app's model picker. Think of it as "the latest flagship" — Kimi's model names change every few months, so confirm the name at the top of your chat (AIToolSteps K3.1 Pro guide; Simy Kimi reference, both checked Oct 29, 2026).

Does Kimi use my chats for training?

According to Kimi's official help, chat data may be anonymized and used for training, though you can ask support to stop that (five to seven business days). Keep customer data, unpublished figures, and anything confidential out of the chat (Simy Kimi reference, checked Oct 29, 2026).

Is Kimi better than ChatGPT?

It is better at specific things — reading very long documents in one conversation and free coding help — and not a general replacement for every use case. Each major chatbot has a different strength, so match the tool to the job; many people use Kimi alongside another assistant (AIToolSteps comparison; Simy Kimi reference).