AI credits
AI credits are pay as you go. No plan includes any and no plan caps them: you buy what you need, and your plan only decides whether AI is available at all.
Free | Starter | Pro | Ultra | |
|---|---|---|---|---|
AI in the app | None | Pay as you go | Pay as you go | Pay as you go |
Credits included | None | None | None | None |
AI credits explains what a message costs, where to see your balance and how to add credits. This page covers the pricing.
Pricing
One credit costs $0.01. Credits never expire.
Top-up | Bonus |
|---|---|
100 to 2,499 credits | None |
2,500 to 9,999 credits | 2% extra |
10,000 credits or more | 5% extra |
The packages in Add credits are 500, 1,000, 2,500, 5,000 and 10,000 credits, and Custom takes any amount from 100. A 10,000 credit top-up costs $100 and adds 10,500 credits. The Summary shows the total you receive before you pay.
Payment goes through PayProGlobal, which is the merchant of record. Each purchase is listed under Transactions on the Subscription page.
What spends credits
Messages to the Agent, the builders' agents and the other chats in the app. Each message is charged for the work the model does on it, so the model you pick and the size of the job set the cost.
These spend none:
Messages that run on your own Claude or ChatGPT subscription in Chartnaut Desktop. See Use your own AI subscription.
The CLI, MCP server and API. Their runs count against your runs at once and API limits, not credits. When Claude Code or Codex drives the CLI, or Claude, ChatGPT or Cursor connects over MCP, the AI runs on your plan with that app. See Working with Claude Code and Codex and Connect Chartnaut to an AI app.
Claude Code
CodexWhen credits run out
Chats say No AI credits remaining. and messages on credits stop until you top up. Nothing else in Chartnaut stops. Hitting a limit lists every other limit message.