ChatGPT-5.5 credit packs
Buy GPT-5.5 credits like a simple online pack.
Choose an amount, pay once with Stripe, and receive API credits for GPT-5.5. When partner surplus is available, X420 can give you up to 50% more value than paying the official token price directly.
Quick answer
How X420.ai GPT-5.5 credit packs work
Choose the amount you want to buy before VAT, pay securely, and receive twice that amount as official-value GPT-5.5 API credit. For example, a 10€ base amount gives 20€ of API credit after payment confirmation.
- Starter example
- 10€ base amount gives 20€ credit
- Credit value
- 2× official-value GPT-5.5 credit
- Savings
- Up to 50% effective reduction
- Coming soon
- Claude Pro offer in preparation
Updated 2026-06-04. Prices and availability can change with partner surplus supply.
Coming soon
Claude Pro offer
A discounted Claude Pro plan is being prepared for X420 customers.
€50
instead of €90
- ✓ Claude Pro access planned
- ✓ Target offer: €50 instead of €90
- ✓ Checkout opens when available
Savings calculator
Estimated monthly savings
42,25 €
A simple estimate using GPT-5.5 pricing assumptions and a 10% input / 90% output token mix. Your real savings can vary with supply and usage.
Why the discount exists
X420 buys discounted unused capacity from verified partners, then turns it into prepaid GPT-5.5 credits for customers. You get a familiar API endpoint, spending limits, and a lower effective price when that supply is available.
Savings are compared with public official pricing and can vary with partner supply, payment fees, model availability, and usage mix. X420.ai is not OpenAI; it provides a separate prepaid API credit service compatible with OpenAI-style requests.
Official pricing vs X420 credits
Price
Official direct
Pay the public token price directly
X420.ai
Buy prepaid credits with up to 50% more value when supply is available
Payment
Official direct
Provider account, invoice, or usage billing
X420.ai
One Stripe payment for a prepaid credit pack
Integration
Official direct
Use your official provider API account
X420.ai
Use https://api.x420.ai/v1 with an X420 key
Budget control
Official direct
Controls depend on your provider setup
X420.ai
Set a spending limit on each API key before traffic starts
Availability
Official direct
Direct official availability
X420.ai
Discount depends on partner surplus and routing capacity
Quick FAQ
What is X420.ai?
X420.ai sells prepaid GPT-5.5 API credits through an OpenAI-compatible endpoint with wallet balance and spending limits.
Is X420.ai OpenAI?
No. X420.ai is a separate prepaid API credit service compatible with OpenAI-style requests.
How does pricing work?
Choose an amount, pay securely, and receive twice that amount as official-value GPT-5.5 API credit when the pack is confirmed.
What endpoint do developers use?
Use https://api.x420.ai/v1 as the base URL with your X420 API key.
Is Claude Pro available?
Not yet. The Claude Pro offer is listed as coming soon and checkout stays disabled until it opens.
Pricing FAQ
Why is X420 cheaper?
X420 buys unused partner capacity at a discount and offers it as prepaid GPT-5.5 API credit when supply is available.
Is X420 OpenAI?
No. X420.ai is a separate service with an OpenAI-compatible API format. It is not OpenAI and not an official OpenAI reseller.
Can the discount change?
Yes. The best price depends on available partner supply, payment fees, model availability, and usage mix.
Do I need a new SDK?
No. Keep your OpenAI-compatible SDK. Change the base URL and use your X420 API key.