Paying for AI by international card or VND bank transfer with a VAT invoice? Buying direct vs LaRouter

Many teams in Vietnam now use GPT and Claude every day: developers use Claude Code and Codex, operations teams run n8n workflows, and company software calls models through an API. The next question is always: how do we pay, and how does accounting record it?

▶ Watch: sign up, choose a plan and pay (about 2 minutes, in Vietnamese): youtu.be/SAMQSljnsLg

This article compares two options: buying directly from OpenAI and Anthropic with an international card, and using a LaRouter plan paid in VND. Each suits a different kind of team, and the article says plainly when buying direct is the better choice.

Buying direct with an international card: what you get, what gets in the way

What you get: you work directly with the provider, with all of its features and its newest models, and a separate dashboard from each one.

What gets in the way for small teams and Vietnamese businesses:

• You need an international card: usually one person's card, tied to a personal account. If that person leaves or the card expires, the service stops.
• Currency conversion fees: banks often add a foreign transaction fee, around 1 to 4% depending on the card.
• Two providers, two accounts, two invoices: using both GPT and Claude means managing two places and two ways of topping up.
• Hard-to-predict cost: you pay by usage, so a busy month raises the card bill.
• Paperwork for accounting: an invoice from a foreign provider is not a VAT invoice issued in Vietnam. A business that needs documents to record the expense should ask its accountant before choosing this route.

Through LaRouter: pay in VND, one plan, one key

• ChatGPT and Claude in one plan, from just 300,000 VND/month. Plan T150 has $150 of usage per week, reset every 7 days. Each $150 a week is about the size of one Claude Pro or Codex account. Six tiers from T150 to T1500 (3,000,000 VND/month, about 10 accounts). Annual plan: pay for 12 months, use 13.
• Pay in VND by bank transfer (VietQR). No international card needed.
• VAT invoice for businesses: prices exclude VAT; choose "VAT invoice for a company" at checkout, pay 10% VAT on top, enter your company details, and the e-invoice is emailed within 3 working days.
• One API key for the whole team: use it in Claude Code, Codex, n8n and your company's software. To switch models, change the model name.
• Fixed monthly cost: you know the amount in advance, and the whole team's usage shows in one dashboard.

The trade-offs:

• Weekly limit: when you use it up, you wait for the next reset or upgrade. A team with heavy usage should pick a larger plan.
• Models on LaRouter's list: most popular GPT and Claude models, but not every feature specific to each provider.
• One more party in the middle: requests go through LaRouter before reaching the model. A team with strict data rules should check its own requirements carefully.

Quick comparison

	Buy direct, international card	LaRouter
Payment	International card, USD	VND bank transfer (VietQR)
Documents	Invoice from a foreign provider	10% VAT invoice for businesses (prices exclude VAT)
GPT and Claude	Two accounts, two keys	One plan, one key
Cost	By usage, hard to predict	Fixed monthly, from 300,000 VND
Usage tracking	At each provider	One dashboard for the whole team
Limits	Account limits and the amount topped up	Weekly limit, upgrade when needed
Setup	Each provider's documentation	Vietnamese guides, about 2 minutes

When to buy direct

• The company has a company card and does not need a Vietnamese VAT invoice.
• You need an enterprise contract, or data or service commitments signed directly with the provider.
• You need a feature only the provider has, or a newly released model is not yet on LaRouter's list.
• Usage is very high and steady, and someone already tracks costs separately.

When LaRouter fits better

• Small teams, freelancers and small and medium businesses that want to pay in VND.
• Businesses that need a VAT invoice to record AI expenses.
• You use both GPT and Claude and want one key and one invoice.
• You use Claude Code, Codex or n8n and want a quick setup with Vietnamese guides.
• You want a fixed monthly AI cost that is easy to put in a budget.

Tool: which option fits your team?

Get started

• Setup guides: Claude Code and Codex, n8n, calling the API from code.
• See the plans: larouter.lapage.vn
• For advice on a plan for your whole team or the invoice process, message LaPage on Zalo.