> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cosmon.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Plans & Credits

> What each Nexus plan includes, how credits are measured, and how allowances work on a team.

## Plans

| Plan         | Price       | Included allowance    | Bring your own key | Integrations          |
| ------------ | ----------- | --------------------- | ------------------ | --------------------- |
| Free         | \$0         | 100 credits, one time | No                 | CAD only              |
| Core         | \$20/month  | 300 credits/month     | No                 | CAD only              |
| Professional | \$200/month | 3,000 credits/month   | **Yes**            | CAD + CAE             |
| Enterprise   | Custom      | Custom                | **Yes**            | CAD + CAE, on-premise |

Core and Professional are self-serve — subscribe from the pricing page and
change or cancel it yourself. Enterprise is negotiated with sales and invoiced;
email [sales@cosmon.com](mailto:sales@cosmon.com).

<Note>
  The Free allowance is **one time, not monthly**. It is what you get to try
  Nexus with; it does not refill. Every paid plan refills each billing period.
</Note>

## What a credit is

One credit is **\$0.05 of model usage**. You are charged for what a request
actually consumes, so cost varies with the model, the size of your prompt, and
how much the agent has to reason — a short question costs a fraction of a
credit, a long CAE debugging session costs many.

Because it is measured rather than counted, there is no fixed "number of
messages" a plan buys. The usage page shows what you have spent and what is
left.

## How the monthly allowance works

Your allowance is not a wallet that gets topped up on the 1st. It is measured
across a **rolling billing period** that starts on the day you subscribed.

Nexus adds up what you have spent since your period began and compares it to
your plan's allowance. When your period rolls over, that start date moves
forward and the earlier spend falls outside the window — which is what makes
the allowance available again.

Two consequences worth knowing:

* **Unused allowance does not accumulate.** Spending 50 credits in a 300-credit
  month does not give you 550 the next month. The window moves; it does not
  carry a balance.
* **Your reset day is your signup day**, not the first of the month. Subscribe
  on the 14th and your allowance refreshes on the 14th.

## Going past your allowance

Buy a **credit pack** — 300 credits for \$20, the same rate as Core. Packs are
available on any paid plan.

Unlike the monthly allowance, purchased credits **are** a balance: they sit on
your account, they are only ever drawn down by usage, and they do not expire.
Nexus uses your monthly allowance first and only draws on purchased credits
once it is spent.

<Note>
  Credit packs are not available on Free. Upgrade to Core or higher first.
</Note>

## Bring your own key

Professional and Enterprise can point Nexus at your own Anthropic or OpenAI API
key, in **Settings → Model & provider**.

Traffic sent with your own key does not pass through Nexus, so it costs you
nothing from your allowance — you are billed by the provider directly. This is
usually the reason to choose Professional over Core if you already hold model
credit with a provider.

On Free and Core the provider is fixed to Cosmon-hosted models.

## Teams

A team buys **licences**, and an owner or admin assigns each one to a person.
Licences come in the same tiers as personal plans, and a person holding one gets
that tier's capabilities — including BYOK on Professional and Enterprise.

### The allowance is shared

A team's allowance is **the number of licences of a tier, multiplied by that
tier's allowance**, shared by everyone holding one:

```
5 Professional licences × 3,000 credits = 15,000 credits/month for the team
```

That pot is shared, not divided. One person can use more than their notional
share, and the team runs out when the pot does. Allowances are pooled **per
tier**, so Core holders and Professional holders draw on separate pots.

To stop one person exhausting the pot before their colleagues start, an admin
can set a **per-member monthly cap** in the team console. A capped member is
limited to their cap; everyone else still draws on the pot.

### Moving a licence between people

Reassigning a licence does not reset anything. The allowance belongs to the
licence tier, not to the person holding it — so if a team has spent 95% of its
Professional pot, the next holder starts with the remaining 5%.

### If you are on a team

Your licence comes from your team, so the plan on your personal account stays
free. You do not need a personal subscription, and buying one would not add
anything: while you hold a licence, that is what Nexus serves.

Use the account switcher next to your avatar to move between your personal
account and your team's.

<Note>
  A person belongs to at most one team.
</Note>

## Checking your usage

The **Usage** page shows your current period, what has been spent against it,
and any purchased credits. On a team it shows the shared pot and your own share
of it, plus your cap if an admin set one.