Credits
Credits let you chat without a Claude account of your own, or keep going when every one of your accounts is out of its 5-hour window. There is no subscription: you buy a pack once and it never expires.
Your own Claude accounts stay free. Credits are only spent by chats you put on them.
Signing in
Credits belong to a Google account, so you sign in once:
- Click Sign in with Google — in the account menu, in Settings › Claude, or on the message that appears when a chat needs credits.
- Your browser opens. Sign in with Google there.
- Come back to the app. You stay signed in, even after a restart.
Buying credits
Click Buy credits in the account menu, pick a pack and a way to pay:
- Bank transfer (VietQR) — scan the QR code in your banking app.
- Card — any international card.
| You pay | You get in credits | Notes |
|---|---|---|
| 20.000 ₫ | $10 | Bank transfer only |
| 50.000 ₫ | $25 | |
| 100.000 ₫ | $55 | +10% bonus |
| 200.000 ₫ | $120 | +20% bonus |
Credits arrive as soon as the payment does, and the app tells you when they land.
Chatting on credits
Open the chat's Account menu and pick Pay with credits. A new chat starts on Haiku, the cheapest model; pick Sonnet or Opus in the model menu whenever you need them.
What a reply costs
Credits are written in dollars of Anthropic's own list price, and each model is charged at its own rate — Sonnet costs 20× and Opus 40× what Haiku does. Every reply on credits ends with what it took off your balance, so you never have to guess.
As a rough guide, one call to Sonnet with a mostly cached prompt is about $0.01–0.015, and a Claude Code message makes a few of them. Haiku costs a twentieth of that and Opus twice as much.
TIP
Long conversations cost more per message, because the whole conversation is sent each time. On credits, a chat is compacted automatically before it grows past 100K tokens.
Where your requests go
On credits, requests go through Vey Studio's server to Anthropic, which is how they are charged. Your sign-in is never passed on. On your own accounts, requests go straight from the app to Anthropic — the server is not involved.