Pricing

Each model has an input price and an output price per million tokens, listed in the table above in yen or, with the currency switch, in US dollars; an account is always billed in the currency it was opened in. A request costs its prompt tokens at the input rate plus its generated tokens at the output rate; image and video models are priced per image or per video instead, and structured decisions are a flat price per accepted request that does not change with the number of questions or the length of the body. The amount is deducted from your balance as the request completes.

No. You add credit to your balance by card or bank transfer and requests draw it down; payments are processed through Stripe. When the balance reaches zero, paid requests stop until you add more — the balance is also your spending cap.

For a yen account: credit card or Japanese bank transfer (furikomi), both prepaid, both from ¥500, both with a qualified invoice. A US-dollar account tops up by card, from $5. Choosing bank transfer issues the invoice immediately with a virtual bank account dedicated to you; it is payable for 14 days, and your balance is credited automatically once the transfer lands, so you do not need to notify us. The sender pays the transfer fee. One open transfer invoice at a time. There is no postpaid month-end invoicing.

Yes. The free model (gemini-flash-lite-free) can be called at ¥0 with a fresh account, from the browser chat or the API, within a per-key rate limit. Paid models need a positive balance.

The per-token prices are before tax. Japanese consumption tax is added when you buy credit, and the checkout shows the tax-inclusive total before you pay.

Yes. FastMetal is a registered qualified invoice issuer (registration number T5010001015990) and issues a qualified invoice for every credit purchase. You can pay by credit card or by bank transfer (prepaid). Choosing bank transfer issues a qualified invoice immediately, carrying a bank account dedicated to your account; credit is added automatically once the transfer is confirmed, so there is no need to notify us. Postpaid invoicing — billing in arrears at month end — is not available.

Yes. Prepaid credit carries an expiry date, set out with the other terms in our commercial transaction disclosure. To keep using the service past it, buy additional credit.

Once the service has started, refunds are not given in principle. Credit can be bought from a small amount, so start small and top up once you know how much you use.