Compare pricing
Official direct access vs X420 prepaid credits.
X420.ai is not an official OpenAI reseller. It offers prepaid GPT-5.5 API credits through an OpenAI-compatible endpoint, with up to 50% more value when discounted partner capacity is available.
Clear choice
Use X420 when you want prepaid GPT-5.5 credit and capped keys
X420.ai is best when you want to buy credit first, create a capped API key, and keep an OpenAI-style integration. Direct official billing is better when your team requires a direct provider contract or guaranteed official availability.
- Best for
- Prepaid GPT-5.5 credit + capped keys
- Integration
- Change the SDK base URL
- Caveat
- X420.ai is not OpenAI
- Availability
- Depends on discounted partner capacity
Updated 2026-06-04. Pricing and availability can change with partner surplus supply.
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.
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.