# Billing

Source: https://webagent-docs-staging.lookover.ai/concepts/billing

> How webagent usage is measured. Compute in GB-minutes of browser time, and AI model use counted separately.

webagent bills by the compute you use. This page explains what is measured. It does not list prices. Prices are set by Lookover and can change, so read the current rates on the Usage page of the dashboard.

## Compute: GB-minutes of browser time [#compute-gb-minutes-of-browser-time]

Compute is the memory a browser holds, times the time it holds it. The unit is the **GB-minute**: a browser with 1 GB of memory that runs for 1 minute uses 1 GB-minute.

- **Size.** Each session reserves a fixed amount of memory (1 GB or 2 GB, depending on the plan). The size is stored on the session when it opens. See [Limits](/concepts/limits).
- **Time.** From the moment the session starts until it ends. Minutes are rounded up per session.
- **Idle time counts.** A session holds its memory whether the browser is busy or waiting. Stop sessions you no longer need, or let the idle limit end them. See [Sessions](/concepts/sessions#how-long-a-session-lives).
- **Quick actions.** `scrape`, `screenshot`, `pdf` and `crawl` have no long-lived session. They are measured by the time they run, per started second.
- **Actions inside a session.** Clicks, typing, steps of a [skill](/concepts/skills) and tasks are not measured on their own today. Their compute is part of the session time.

A 2 GB session uses twice the GB-minutes of a 1 GB session for the same time.

## Other measured items [#other-measured-items]

- **Network traffic out of the browser** is measured in MB.
- **Managed proxy traffic**, when you use the managed proxy network, is measured in MB received.

## AI model use [#ai-model-use]

When the agent works on a [task](/concepts/tasks), it calls an AI model. That use is recorded on its own line, apart from compute. Each task shows its model cost in `costMicros`, in millionths of a US dollar. The dashboard Overview shows AI spend. Whether AI use is charged, and at what rate, is part of the price list and can differ from compute.

## Where to see your usage [#where-to-see-your-usage]

- The Usage page in the dashboard shows browser compute in GB-minutes. The Overview shows AI spend.
- `GET /v1/usage` and `GET /v1/billing` return usage and billing data through the API.
- `GET /v1/tenant` shows your plan limits and what you use now.

## Budgets and credits [#budgets-and-credits]

An organization can have a monthly budget with a hard cap. When it is reached, new sessions fail with `capacity_exceeded` and `details.quota: "budget"`. An organization can also hold a credit balance. When Lookover has switched credit enforcement on and the balance is used up, new sessions fail with `capacity_exceeded` and `details.quota: "credits"`. Sessions that are already running finish. See [Limits](/concepts/limits).