Claude Code
Anthropic AI agent: give it a task in words, then it works on its own.
Sign in with $17/mo
Pro with annual billing
Claude models
Anthropic models only
Closed source
Repository - tracker only
Use it for serious work on your project. Do not use it for editor suggestions or free access: there are no suggestions here, and no free plan either.
Claude Code isn't an editor or a chat, it's an autonomous executor. You describe the task in words, and from there the agent works on its own: it finds the right spot in the project, makes the edits, checks its own work and brings back a finished result with a report on what it changed. It feels like a contractor you hand a task to, not a tool you steer by hand. It was born in the terminal, but by August 2026 the main entry point is its own desktop app.
Where Claude Code sits on the big AI map
Nearby: Codex·Cursor·GitHub Copilot·Lovable·Replit·+ another 44
1. Should you get it
The choice comes down to two profiles: see which one is yours.
Who it is for. Claude Code is built for work on a live project - at work or your own. Redo half a site, clean up tangled code, fix what broke: the agent finds the right place, plans, and checks itself. It handles long tasks without supervision, reporting along the way.
Don't write code? The terminal is optional: you can assign a task in the desktop app or directly in the browser, like in a chat. But the product is still about code - to accept the agent's work, you need to understand what it did.
Who it is not for. There are no inline suggestions as you type here; for those, people go to AI editors. There is no free Claude Code: at Anthropic only the chat is free, the agent starts at $17/mo. Claude models only, you can't plug in your own local ones.
Just getting started? Haven't written code or built projects yet - start with the page“What is vibecoding”, then come back here for a tool.
It is a fit. Install it following section 3. If you are choosing between it and Codex, see the decision guide in 7.
Claude Code news
- Passwords in Claude Code permissions leaked to GitHub: Apiiro finds 1,122 public filesNovember 7
- ChatGPT and Codex to share a usage limit: starting in December, the agent will draw from the subscription’s shared allowanceNovember 5
2. What it does
The easiest way is to show it in action: Claude Code is what builds this site. Below are six real tasks it closed here in August 2026.
Rewrote the page in a day. The Codex page was a month old, and its facts were outdated. The agent reread 128 of our news stories about it, checked every number against fresh sources, and rewrote the page from scratch - on August 17, it was current again.
Delivered research overnight. It received a question in the evening and delivered a report by morning: about forty search queries, 45 sources read, and a conclusion added to the page. It worked on a separate laptop while people slept.
Compiled a biography and verified the facts itself. Founder biography in English: I cross-checked academic papers against the arXiv database and deal dates against reporting from those years. Anything I could not verify, I said so.
Found where the money was leaking. The hosting bill was melting before our eyes: $15 out of $20 in six days. The agent checked billing, found the cause, and suggested another plan - $103 less per month.
Fixed what failed overnight. A nightly demand-measurement script started failing. The agent found the network cause, rewrote the script with retries - the failures stopped.
On duty without days off. Claude Code also runs the site's news feed: on a separate laptop, it checks every minute whether a story is ready, selects stories, and writes copy without a human.
What it looks like. The loop in any of these tasks is the same: you write what you need, the agent lays out a plan, makes edits, shows every change line by line, and sees it through. The full loop is in the frames below.
How much freedom to give it. By default, the agent asks for confirmation for every edit and command. Once you trust it, turn on auto mode: edits are accepted automatically, stopping only for risky actions.
Where it stops. The agent does not take dangerous actions even in auto mode: in one of our runs, it refused to click the permissions-granting button - a human made the final click.
Then on its own. Further up the axis: loops, background tasks and parallel subagents in one session. The top step: cloud sessions at claude.ai/code keep running when the laptop is closed, and you can steer them from your phone. Since Sep 17, Pro and Max have a beta of Projects, where Claude itself hands out parts of one job to parallel cloud sessions.
If a game project needs 3D objects, pick a separate model generator. Export terms and rights are covered in the Tripo card.
3. Where it works and how to install
One subscription opens Claude Code in five places: desktop, terminal, VS Code, JetBrains, and the browser with your phone, and around them nine integrations from CI to Slack. Start with the desktop app, today it's the main way to use Claude Code without the command line. The terminal is for those who live in the CLI and want the full set of flags.
Before you start. You need a Claude account with a Pro/Max subscription or a Claude API key. Installers for all surfaces are on the official Claude Code page.
On desktop+
An app for macOS and Windows, including ARM64, plus a beta for Linux: parallel sessions without a terminal, scheduled tasks, launching from your phone via Dispatch.
Step 1. Download the app at claude.ai/download
Step 2. Sign in using the method offered by the app
In the terminal+
Native surface and the full set: auto mode, subagents, hooks, /usage command. Start here if you want maximum control.
Open Terminal
This is an app where you enter commands as text. Press ⌘ Space, type "Terminal," and press Enter.
Paste the installation command
Copy it using the button on the right, paste it into terminal (⌘ V), and press Enter. The script will download and install Claude Code automatically — it takes about a minute.
curl -fsSL https://claude.ai/install.sh | bashAlternative if you have Node.js 18+: npm install -g @anthropic-ai/claude-code
Launch it
Type claude and press Enter.
claude✻ Welcome to Claude Code!
/help — tips · try: "explain this project"
Sign in to your account
When you first launch it, Claude Code will open a browser and ask you to sign in. Have a Claude subscription (Pro or Max)? Choose it — no separate payment needed. Don't have one? Choose Anthropic Console and pay for usage. Once you've confirmed sign-in, you're ready to work.
In the editor+
VS Code extension (also installs in Cursor) and JetBrains plugin: changes are visible directly in files, and you review agent plans without leaving the editor. If you need an agent alongside the editor, not instead of it.
code --install-extension anthropic.claude-codein JetBrains: Settings, then Plugins, then "Claude Code"
In the browser and on your phone+
Cloud sessions at claude.ai/code: nothing to install, the code runs in Anthropic's sandbox. A session can be continued in the Claude app for iOS and Android or pulled into your own terminal with the teleport command.
Open claude.ai/code; there is nothing to install
In CI+
Automatic review of every PR and issue analysis. For teams that need an agent in the pipeline, not the editor.
In Slack+
@Claude in a thread turns discussion into a pull request. Channels push events from Telegram, Discord, and webhooks straight into a running session.
For your own agents+
Your own agents on the Claude Code engine (TypeScript and Python) and cloud schedules on Anthropic infrastructure. For those building on top, not just using it.
4. What the tests show
An agent's score is always calculated for an "agent + model" pair. Claude Code is measured with Opus 5.5 and Fable 5.1, Codex with GPT-6 Astra and Sol. Compare pairs, not brands.
Claude Code's best pair. This is the pairing with Claude Opus 5.5 max (with fallback): in the measurement Nov 8, 2026 it scored 61.7 points on the AA index and ranks first of 24 pairs in the table.
agent table: weight - editorial · AA score - best pair · AA Coding Agent Index Nov 8, 2026 · Terminal-Bench 4.0 Nov 8, 2026 · DeepSWE v1.1 Sep 22, 2026 · “—” - pair not measured
Choosing between it and Codex - the showdown in section 7.
5. What it costs
Entry starts at $17 a month. That's the Pro plan paid annually, month to month the same Pro costs $20. Inside is the full Claude Code on every surface, but the strongest model, Fable 5.1, runs on credits beyond the subscription on Pro. There is no free door: the Claude Free plan doesn't unlock the agent, and a subscription bought through the App Store doesn't include it either.
Plans and what they include
| Plan | Monthly price | What it gives you |
|---|---|---|
| Pro | $17 when paid annually, $20 monthly | the full entry point to Claude Code: every surface, Opus 5.5 and Sonnet 5.5 |
| Max 5× | $100 | limits 5x Pro and Fable at no extra cost: everyday work without hitting the ceiling |
| Max 20× | $200 | limits 20x and Fable at no extra cost: long agent sessions and parallel tasks |
| Team | $20–25 per seat, Premium $100–125 | Claude Code comes with the regular seat, Premium gives five times the limits and Fable without credits |
| API | By tokens | no subscription, per million tokens: Opus 5.5 $4/$20, Fable 5.1 $10/$50, Sonnet 5 $2/$10 |
Prices verified Sep 26, 2026 against Anthropic's official price list
Limits are shared across everything. The subscription shares one pool across claude.ai, Claude Code and the desktop app: 5-hour sessions plus weekly limits. Usage is visible with the /usage command. Hit the ceiling and you buy credits at API prices (top-ups up to $2,000 a day), and since Aug 13 the desktop app can continue working on its own after the limit resets.
What we checked and how
| Fact | What we know | Verified |
|---|---|---|
| Plans | There is no free plan. The entry point is Pro: $17 a month billed yearly ($200 up front), $20 monthly. Max adds limits: 5x for $100, 20x for $200. In Team, Claude Code comes with a standard seat at $20 billed yearly and $25 monthly. A premium seat at $100–125 gives five times the limits, and Fable is included in the plan there. Enterprise counts differently: $20 per seat plus usage at API prices. Through the API no subscription is needed, you pay only for tokens. | 2026-09-26 |
| Free access | No. The free Claude plan provides chat only; the agent is not included. The cheapest entry point is Pro at $17–20 per month or the API with token-based billing. | 2026-09-26 |
| Add-ons beyond limits | Hit the limit - turn on usage credits: from there usage is billed at API prices as a separate line on the invoice. You can set a monthly cap and auto top-up at a threshold, and you can add no more than $2,000 a day to the balance. Credits add volume but do not change the 5-hour session cycle. On Pro and on a standard Team seat, credits also pay for Fable. | 2026-09-26 |
| Limits | The limit is twofold: a 5-hour session plus weekly limits, one shared across all models and a separate one for Fable. The pool is shared between chat, Claude Code and the desktop app: spend it in chat and you have spent it for the agent. Usage is visible on claude.ai in Settings › Usage and via /usage. Max gives 5 or 20 times more than Pro, a premium Team seat 5 times more than a standard one. On Max and on a premium seat, Fable takes up to 50% of the weekly limit at no extra cost. | 2026-09-26 |
| Model pricing (API) | API prices per million tokens, input and output: Opus 5.5 is $4 and $20, cache reads $0.20; Fable 5.1 is $10 and $50, cache reads $0.25; Sonnet 5.5 and Sonnet 5 are $2 and $10; Haiku 4.5 is $1 and $5. The previous Opus 5 and Fable 5 cost $5/$25 and $10/$50. | 2026-09-28 |
| For students | There is no free student plan. A university can sign up for Claude for Education - a shared plan for students and faculty at a reduced price, Claude Code included, pricing on request. For an individual student there is the Campus program: Claude Builder Clubs share API credits with their members. Applications for club leads for fall 2026 are closed. | 2026-09-26 |
All vendors rebuilt billing around token credits in 2026; figures change every few weeks. Each line above has a verification date: do not trust figures without a date, including ours - and check them against Anthropic's official pricing.
6. Can you trust it with code
What to check before letting an agent into a production repo.
Where the code goes. Under commercial terms (Team, Enterprise, API), Anthropic does not train models on your code. On personal Pro and Max plans, training happens only with consent: data is retained for 5 years when enabled, 30 days when disabled.
What the agent can break. It edits files and runs commands. Since August 14, new sessions run in auto mode: a separate classifier filters out dangerous commands. You set the boundaries yourself - down to confirming every step; the enterprise plan adds organization-wide controls.
What we checked and how
| Fact | What we know | Verified |
|---|---|---|
| Code privacy | Commercial terms (Team, Enterprise, API): Anthropic does not train models on your code or prompts. Consumer plans (Free/Pro/Max): training only with the user's consent - five years of retention when it is on, 30 days when it is off. Zero data retention (ZDR) is enabled by Anthropic for individual organizations on Enterprise after a review. | 2026-09-26 |
| Organization controls | Admins set policies centrally: a list of allowed models and its enforcement, since v2.1.283 also a ban on individual models, allowed and denied MCP servers, a minimum and maximum CLI version, forced login into the organization, monitoring via OTel. | 2026-09-26 |
| Open source | No: the CLI is proprietary, and LICENSE.md in the github.com/anthropics/claude-code repository reads "© Anthropic PBC. All rights reserved". The repo holds the changelog, issues, examples and plugins, but no CLI sources. | 2026-09-26 |
7. Claude Code or Codex
The fork is not “who is better,” but “what kind of work.” Claude Code wins on depth: one agent can carry a complex task in a large repo for a long time and make careful edits. Codex wins on breadth and price: it is an assembly line run in batches.
In August, they diverged even further. Samsung brought Claude Code into chip development: verification shrank from a month to two days (August 13). Over the same period, Codex moved beyond code - it clicks through your apps, fixes Windows settings, and creates thumbnails for YouTube.
Result versus price. In the Artificial Analysis measurement on Sep 25, 2026, Claude Code with Opus 5.5 took first place with 66 points, Codex with GPT-6 Astra scored 61.6. Codex, though, closes a task twice as fast and almost twice as cheap: 29 minutes and $7.47 versus 65 minutes and $13.04.
What to choose for the task
| Criterion | ||
|---|---|---|
| Strength | depth: long complex tasks in a large repo, careful edits | breadth: task pipeline in batches, and not just code |
| Fresh proof | Samsung: chip verification in 2 days instead of a month (13.08) | IBM moves 150,000 consultants to development via Codex (13.08) |
| Entry and price | from $17/mo, no free plan | entry is free in the ChatGPT app, Plus opens the terminal and raises the limits |
| Tests | Coding Agent Index 66 with Opus 5.5 (Sep 25), first place | Coding Agent Index 61.6 with GPT-6 Astra (Sep 25); a task runs twice as fast and almost twice as cheap |
| Hosted in | 5 surfaces: desktop, terminal, VS Code, JetBrains, browser and phone; plus CI, Slack, SDK | 7 surfaces: ChatGPT app (macOS, Windows, Linux from 11.08), CLI, IDE, cloud, GitHub, phone, SDK |
| Beyond code | focus on repo and terminal | clicks and types in your programs: fixes Windows, makes covers |
| officially unavailable | officially unavailable |
Live install count. For a developer, npm works like an app store: terminal agents are installed from there, and every installation appears in a public counter. The chart adds up installs for the week - the higher the line, the more often it is being installed now.
Install race: Claude Code vs Codex
npm downloads per day · ● live
Pros keep both. Gergely Orosz, author of The Pragmatic Engineer newsletter, gave first place in the terminal to both Codex and Claude Code on August 6. They split tasks by type - complex work goes to Claude, bulk work to Codex.
8. History
A year and a half from a terminal experiment to first place in the coding agent ratings, with the drama of Fable 5 disappearing and coming back in the middle.
Feb 24
Born as a research preview with Claude 3.7 Sonnet: an agent living right in the terminal; access via a waitlist.
Nov 24
Gets the Opus 4.5 engine — Anthropic calls it the world's best model for code and agents.
Apr 14
Desktop rebuilt for parallel agents: multisessions, panels, Routines.
Jul 1
Fable 5 returns to full availability: export controls lifted, redeployed with a new security classifier.
Sep 1
Got Fable 5.1 at the same $10/$50 price, cache reads got 75% cheaper.
Sep 22
Switched to Opus 5.5 by default: a 1M window and $4/$20. Two days later the pair topped the Artificial Analysis agents index with 66 points.
9. Frequently asked questions
What is Claude Code in simple terms?+
An AI agent for working with code from Anthropic, the same company that makes the Claude models. You give it a task in plain text in the desktop app, the terminal, an editor or the browser, and it edits the project files itself, runs checks and takes the job through to a commit. Since September 22, 2026 it runs on Opus 5.5 by default.
Claude Code or Codex: which should you choose?+
If the result is what matters, take Claude Code: in the Artificial Analysis rating of Sep 25, 2026 it holds the top two places, 66 points with Opus 5.5 and 62.2 with Fable 5.1. Codex with GPT-6 Astra scored 61.6, but it closes a task twice as fast and almost twice as cheap: 29 minutes and $7.47 against 65 minutes and $13.04. Many people keep both and give Claude Code the hard work and Codex the bulk.
Claude Code or Cursor: which should you choose?+
These are different genres. In Cursor you write the code yourself and the AI helps with autocomplete and inline edits. Claude Code works as an autonomous agent: you hand it a whole task, and it plans, edits files and takes it through to a commit, including in the background and in parallel.
How much does Claude Code cost?+
The Free plan does not include Claude Code. Pro costs $17 a month billed yearly and $20 monthly. Max 5x costs $100, Max 20x costs $200. In Team the agent comes with a standard seat at $20–25 too, and a premium seat at $100–125 gives five times the limits. Enterprise costs $20 per seat plus usage at API prices. Beyond the limits you buy usage credits at API prices, and on Pro they also pay for Fable (checked Sep 26, 2026).
+
Does Claude Code have a free tier or student access?+
There is no free tier: the Free plan does not include Claude Code. There is no student plan either. A university can set up Claude for Education, a shared plan with Claude Code, pricing on request. Student clubs in the Campus program share API credits with their members (verified Sep 26, 2026).
Do you need a Claude Code API key?+
No, if you have a Claude Pro/Max subscription: sign in through the browser, no keys required. An API key is the second path: token-based metering instead of a subscription; it is needed for CI, automations, and team pipelines without a personal login. One of the two paths is required - there is no free sign-in.
What is Claude Code's context window?+
All current models have a million-token window. Opus 5.5, the default, Fable 5.1 and Sonnet 5.5 use it on any plan, including Pro, with nothing to turn on. The older Opus 4.6 and Sonnet 4.6 get 1M as a separate variant, Sonnet 4.6 only with usage credits. There is no surcharge for tokens beyond 200K (checked Sep 26, 2026, Sonnet 5.5 on Sep 28, 2026).
Why does Claude Code use limits quickly, and how can you save?+
Limits are shared across claude.ai, Claude Code and the desktop app: a 5-hour window plus weekly limits, one overall and a separate one for Fable. That is why "Claude devoured everything at once" usually means a heavy mode: Fable, ultracode or parallel subagents. Spending is visible through /usage in the CLI, broken down by skills, subagents, plugins and MCP, and on claude.ai under Settings › Usage. People economize with a cheaper model for simple tasks, a precise slice of context instead of the whole repo, and background sessions for heavy work. The token maximization guide walks through the tricks.
+
Which is correct: Claude Code or Klod Kod?+
Official name - Claude Code.
How long do Claude Code limits really last?+
There are no official figures in hours: limits are counted in tokens and depend on the model and the effort level (5-hour sessions + weekly limits, one pool shared with claude.ai and Desktop). Practitioner signals from spring 2026: heavy agentic tasks on Pro hit the limit fast, Max 5x/20x hold up for a full working day, and parallel subagents and dynamic workflows burn usage several times faster than an ordinary chat. These are anecdotal signals, not official data - track your spending through /usage.
What we wrote about Claude Code
Useful reading before you start
- What is vibecoding: starting from scratch.
- Loops: how to give an agent recurring work.
- The big Claude Code guide - 2026.
- MCP: how an agent connects to your services.
- The full AI agent ranking.





