Basic
$20 / month
Everyday chat, one model.
- Everyday chats and questions
- The Fast model
- Web search with sources
- Conversation history, search and pinning
Tartarus AI pricing
Four plans, priced per month and prepaid in cryptocurrency. Each one carries a flat weekly token budget instead of a per-request meter, so the number below is the whole cost.
Standard
$40 / month
A model that thinks, and room to work.
- Twice the usage of Basic
- Adds Balanced, which reasons before it answers
- 4x the context — a long document in one go
- Full conversation branching
Pro
Most chosen$60 / month
Every model, plus the API and CLI.
- 4x the usage of Basic
- Every model, including Deep for hard problems
- Room for long documents, and long-form replies
- API and CLI access — use it from your own tools
- Enough headroom to work through a long session
Ultra
$100 / month
For work that runs all day.
- Twice Pro’s weekly usage — 8x Basic
- Twice as much in a single sitting, so long days do not stop
- The longest replies on any plan — half again Pro’s in chat
- Every model, including Deep for hard problems
- API and CLI access — use it from your own tools
There is no free plan. A new account starts with no usage allowance, so signing up lands on the plan picker rather than on free inference.
Pay for longer, pay less
Plans are prepaid for a fixed period. Longer periods are discounted, and nothing renews on its own.
| Period | Basic | Standard | Pro | Ultra | Discount |
|---|---|---|---|---|---|
| 1 month | $20 | $40 | $60 | $100 | — |
| 3 months | $54 | $108 | $162 | $270 | 10% off |
| 12 months | $192 | $384 | $576 | $960 | 20% off |
Plan comparison
| Basic | Standard | Pro | Ultra | |
|---|---|---|---|---|
| Price per month | $20 | $40 | $60 | $100 |
| Tokens per week | 15M tokens | 30M tokens | 60M tokens | 120M tokens |
| Output per reply | 4K | 6K | 8K | 12K |
| Models | Fast | Fast, Balanced | Fast, Balanced, Deep | Fast, Balanced, Deep |
| CLI and API | No | No | Yes | Yes |
| Web search | Yes | Yes | Yes | Yes |
| Branching and history | Yes | Yes | Yes | Yes |
How payment works
Pick a plan and a period, choose a currency, and send the payment to the address shown. The plan activates as soon as the payment confirms on chain. Nothing is stored against a card, no billing profile is kept, and no charge recurs — when a period ends, it ends.
Paying again while a plan is still running extends it from the existing expiry rather than restarting from today, so topping up early costs you nothing.
Accepted currencies
- USDT (TRC20)
- USDT (ERC20)
- Bitcoin
- Ethereum
- Litecoin
- Tron
- Monero
What a token is
Models read and write tokens rather than words. One token is roughly three quarters of an English word, and both your message and the model's reply count towards the same budget. A long conversation costs more per turn than a short one, because the earlier turns are re-read on every request.
As a rough calibration: 15M tokens a week is steady daily use by one person, and each plan above doubles that. The larger ones exist for longer documents, heavier days and API traffic, where a single request can be a substantial share of a smaller plan's day.
Pricing questions
- How much does Tartarus AI cost?
- Plans start at $20 per month for Basic, $40 for Standard, $60 for Pro and $100 for Ultra. Paying for three months takes 10% off and twelve months takes 20% off. There is no per-request billing on any plan.
- Is there a free plan?
- No. A registered account starts with no usage allowance, so signing up puts you on the plan picker rather than on free inference. Promotional trial windows are opened occasionally and announced on the site when they are.
- Can I pay with a credit card?
- No. Plans are prepaid in cryptocurrency: USDT on TRC20 or ERC20, Bitcoin, Ethereum, Litecoin, Tron or Monero. Nothing is stored against a card and nothing renews automatically, so there is no subscription to cancel.
- What happens when I reach my weekly limit?
- Generation pauses until the allowance resets at the start of the next week. Your conversations and history stay available the whole time, and moving to a larger plan lifts the limit immediately.