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Cortex is built by the Cortex Foundation. It is not a single app but a small family of applications that share one account, one domain and one set of models: Cortex Chat for conversation and research, Cortex Code for work inside a repository, Cortex Bot for an agent with a computer of its own, Cortex CLI for the terminal, Cortex Design for canvases, and Cortex Security for reviewing pull requests where they already live. This page is the map: the applications and where each opens, what one account means in practice, the models behind them, how the browser differs from the desktop app and the terminal, the hostnames you will meet, and what Cortex does not do yet.

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The applications

Chat, Code and Bot sit inside one shell. The sidebar, the notification bell and Settings are the same objects in all three, and Switch product moves between them without reloading or losing what is on screen. They are deliberately not the same shape. Chat is a transcript. A Code session is a timeline of work with approvals and a diff, not a chat with a different icon. A Bot has a desktop you can watch. A Design canvas is a board, not a markdown sidecar. Read How Chat works, How Code works and How Bot works for the shape of each one. Cortex Bounty is a programme rather than an application you open. It has its own section covering how to pair a hotkey, how to file a report and how verdicts are scored: see Cortex Bounty.

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One account, several surfaces

One sign-in on cortex.foundation opens everything: Chat, Code, Bot, Security, the desktop apps and the CLI. There are no separate logins and nothing to link. Chat is the only application that works before you sign in. Everything else is for signed-in accounts, and the rule behind that is worth knowing because it explains most of the differences you will run into: a guest session cannot be signed back into later to withdraw a grant, so it is never allowed to make one. Guest conversations live in the browser session, so sign in before closing the tab if you want to keep one. Accounts and sign-in has the full comparison and the exact wording of every gate.
Cortex is per account today. There are no teams, no organisations, no invitations to a shared workspace and nothing to administer for other people. Role and directory controls you may see in Settings describe an organisation you cannot create yet.

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The models

Every application runs on Cortex models. In Chat you choose per conversation from the composer, and you set the default under Settings then Models. All three are previews, and all three are available from the Free plan upwards, so no published model is plan-gated today. Earlier model names were withdrawn from the public catalogue and are no longer served. Models is the current list.

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Browser, desktop and terminal

A local host is not a missing browser feature: it exists only where the code can actually run. Computer history is off by default, records times only and never screenshots or audio, and never logs private browsing. Ways to run Cortex compares the surfaces.

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Plans

There are five plan names: Guest for browsing without an account, then Free, Go, Plus and Pro. A plan is a named ceiling on a fixed window, and the two windows Cortex enforces on every turn are messages today and messages this month. When one runs out, Cortex says so and shows when it resets rather than quietly degrading the answer. Plan details, the exact numbers and how a limit reads on screen are on Plans and quotas. Note that Settings then Plan & billing lists the plans and marks the one you are on, but this deployment cannot complete a plan change in the app yet: there is no checkout, no customer portal and no invoice to download, and Billing history stays empty.

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Interface language

The interface is available in eight languages: English, French, Spanish, German, Japanese, Simplified Chinese, Brazilian Portuguese and Korean. The picker lists each one in its own language. Switch under Settings then General then Language. English is the source of truth and is unprefixed. Every other language is a path prefix, so the French site lives under /fr. Your first visit reads the browser’s language once, and after that the choice you saved wins and is remembered for a year. Model prompts stay in English, and the product names are never translated. See Interface language.

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Hostnames

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What Cortex does not do yet

Being clear about the gaps saves you looking for controls that are not there.
  • There is no public model-inference API, no endpoints, no software development kits and no programmatic keys. See Platform API.
  • There are no teams or shared workspaces, as above.
  • Plan changes cannot be completed in the app on this deployment.
  • Passkeys and recovery codes are drawn in Settings but report that they are not available on this deployment. An authenticator app is the second factor that works. See Two-factor authentication.
  • Cortex claims no certification. The Compliance section inside Settings then Data & privacy lists each framework with its honest status, and a status is not a certificate. See Security and privacy.