Prices and estimate
The balance is topped up with packages; generation spends tokens by the actual cost of AI models, but never more than the estimate shows.
Free chapters for a new account: 3
Free chapters are for “Sketch” and “Standard” quality; further chapters are paid from your token balance.
Packages
| Package | Price | Tokens | Rate |
|---|---|---|---|
| Trial | 99 ₽ | 100 tokens | 99 kopecks per token |
| Textbook | 349 ₽ | 380 tokens | 91.8 kopecks per token |
| Semester | 890 ₽ | 1050 tokens | 84.8 kopecks per token |
| Year | 1990 ₽ | 2600 tokens | 76.5 kopecks per token |
Purchased tokens never expire.
Quality and price per chapter
-
Sketch
Fast and cheap — a draft of the series ≈ 11 tokens per chapter (no more than 14) -
Standard
Best balance of quality and price ≈ 17 tokens per chapter (no more than 21) -
Premium
High resolution and neat labels ≈ 36 tokens per chapter (no more than 44)
How the estimate works
- For each included chapter we compute the expected cost "≈ X" and the cap "no more than Y".
- When you start, Y is held on the balance.
- Each chapter is charged its actual cost, but never above its cap — the total never exceeds Y.
- The unused amount returns to the balance right after completion. Failed chapters cost nothing.
Example: a 20-chapter textbook in "Standard" quality ≈ 332 tokens ≈ 305 ₽ at the "Textbook" package rate.