1zero AI
Hosted models in the AI chat, paid for through your 1zero account, with nothing to install.
1zero AI lets you use the AI chat without installing an agent. Sign in to your 1zero account, pick a plan, and choose a model in the chat's model picker. It sits beside the agents on your computer (Claude Code, Codex, Gemini CLI, Cursor), which stay free and are billed by their own providers.
Getting started
Turn AI on in Settings → AI with Enabled.
Sign in. Settings → AI → 1zero AI has Sign in to use 1zero AI. See Account.
Pick 1zero AI in the model picker under the chat's prompt (⌘Ctrl/). Each model's description says its tier and the plan it needs.
1zero AI is listed first, but a new chat only starts on it when you pick it, set it as Default agent, or have no agent installed.
Plans
| Plan | What it gives you |
|---|---|
| Free | A one-time trial with fast, inexpensive models. Needs a verified email. |
| Plus | The everyday models, with usage included each month. |
| Pro | Every model, the most capable ones included, with more usage. |
Each plan has a daily spending limit. When the month's credit runs out, top-ups carry you over: they're used after the plan's credit and each lasts a year.
Prices, the models in each plan, and what each model costs are on the 1zero AI page.
Your plan in Settings
Settings → AI → 1zero AI shows:
- Your plan, a bar for how much of this period's credit (or the free trial) is used, and when it renews or ends.
- Top-ups, if you have any left.
- Today: what you've spent since midnight UTC, against the daily limit.
On Free the button is Upgrade. On a paid plan it's Top up and Manage billing. Each opens the 1zero AI page in a tab. Right-click them for Refresh.
When a message is turned away
If you're out of credit, past the daily limit, or using a model your plan doesn't include, the chat shows a card saying why, with Top up, Upgrade, or Sign in as fits. A turn also stops after 30 steps; send another message to carry on.
Profiles
Each profile can be signed in to a different 1zero account, and a chat bills the account its profile is signed in to.
What leaves your computer
Your messages, and what the AI reads from pages, go through 1zero's servers to the model's maker. 1zero doesn't store or log what you send or what comes back. It keeps what each call cost, so it can bill you.
Payments go through Polar, which handles sales tax and VAT. Prices are shown before tax.