Pricing
Prepaid balance, per-token rates, and the hallucination probe fee.
Zero margin on model costs
We pass model costs straight through: you pay exactly what the provider charges us, per token, with no markup or commission. The only price we set ourselves is the hallucination probe fee.
Your balance
Billing is prepaid. You add credit up front and each request debits your balance. There is no subscription and no invoice at the end of the month.
- Your balance is in dollars. A $25 payment adds $25 of API credit — there is no separate credit currency and no exchange rate to work out.
- Top-ups run between $5.00 and $500.00 per transaction, paid by card through Stripe. We never see or store your card details.
- Cost is settled after each response, from the token counts the model reports.
- Credit does not expire and is not transferable. Unused credit is refundable on request — see the Terms.
When your balance reaches zero, requests are refused with a 402. Nothing is
charged automatically.
Token rates
Cents per million tokens. Read live from the API, so these are the same numbers your requests are billed against.
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Routed models cost exactly the upstream provider's tokens, passed through unchanged — plus the same probe fee as every other request.
The hallucination probe fee
Scoring costs $1.00 per 1M completion tokens — the one price we set ourselves — on top of the model's own (pass-through) rate above.
Output tokens only
The probe scores each token as it is generated, so the work scales with how much the model writes — not with how long your prompt was. A 100k-token prompt with a short answer pays the surcharge only on that short answer.
It applies whenever a request is scored, which is the default. Send
include_scores: false and the surcharge is not charged.
Worked example
10,000 prompt tokens and 5,000 completion tokens, across a few models so you can see how the pass-through rate moves but the probe fee (0.50¢) doesn't:
| Model | Input | Output | Probe | Total |
|---|---|---|---|---|
google/gemma-4-31B-it | 2.00¢ | 4.00¢ | 0.50¢ | 6.50¢ |
anthropic/claude-sonnet-4-5 | 3.00¢ | 7.50¢ | 0.50¢ | 11.00¢ |
deepseek/deepseek-r1 | 0.70¢ | 1.25¢ | 0.50¢ | 2.45¢ |
deepseek/deepseek-chat | 0.26¢ | 0.51¢ | 0.50¢ | 1.27¢ |
Same request, include_scores: false: subtract the 0.50¢ probe column from
each total.
How money is counted
Balances are integer micro-dollars ($1 = 1,000,000 micros) and every charge is computed in integers, rounded up once at the end. No floating point touches the billing path, so a price can never drift by a fraction of a cent.