2026Prepaid AI API

Official AI models.
Half the price.

One API key for GPT, Claude and DeepSeek. The same official models with identical output, at 50% off official pricing, billed precisely for what you use.

Get started View models

One key, one endpoint
Prepaid, no subscription
Clear usage

ModelOfficialXknwn

GPT10050

Claude10050

DeepSeek10050

Credits per 100 of official usage

50% OFF

Business clients: 50+
Tokens served per month: 2B+
Compatible AI clients: 9+
Off every model: 50%

Why Xknwn

Top models, exclusive pricing

Everything you need to build with the best models, without paying full price.

3 top models, one key

GPT, Claude and DeepSeek behind a single API key and endpoint, so you can switch models freely.

50% off every model

Every call costs half the credits of the official API. Business plans get tailored rates.

Prepaid, pay-as-you-go

Add credit when you need it. No subscription, no monthly plan, and every request and charge is visible in your workspace.

No downgrades

Direct official API with official model names. No reverse-engineering, identical output quality.

Training ready

Bulk CoT data, RL reward scoring, data synthesis and evaluation. Bigger volume, bigger savings.

Works with your tools

Plug your key into 9+ popular AI clients, or call the API directly from your own code.

Same performance

Same intelligence,
half the credits

You get the exact same official model and the same output quality. The only thing that changes is the bill.

Top up 100 USDC
=
100 credits
=
$200 of official usage

Comparison	Official API	Xknwn
Model	Official original	Same official model
Output quality	Standard	Identical
Model names	Official	Official
Credit cost	100	50, half off

For developers

Connect in minutes

Read the docs

Create an account
Sign up and open your workspace.
Add credit
Top up when you need it. 100 USDC = 100 credits.
Create a key and call the API
Point your client or code at https://xknwn.io/v1 with your key as a bearer token.

cURL · POST /v1/chat/completions

curl https://xknwn.io/v1/chat/completions \
  -H "Authorization: Bearer YOUR_XKNWN_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: my-first-request-001" \
  -H "X-Xknwn-Budget-USD: 0.10" \
  -d '{
    "model": "gpt-5.4-nano",
    "messages": [{"role": "user", "content": "Say hello."}],
    "max_tokens": 32
  }'

GET/v1/models
POST/v1/chat/completions
POST/v1/responses
POST/v1/messages
POST/v1/images/generations
POST/v1beta/models/MODEL:generateContent

Availability depends on the model. Chat, Responses and Messages support streaming.

Works with

Cherry Studio
AionUI
CC Switch
DeepChat
AQBot
Lobe Chat
AI as Workspace
AMA 问天
OpenCat

Use cases

Trusted by 50+ businesses

From in-app assistants to large-scale model training, teams across industries run on Xknwn.

Software / SaaSCode gen, in-app AI

E-commerceMultilingual listings

Fintech / Web3Reports, analytics

Online educationAI tutoring, quizzes

Content & marketingCopy, scripts, socials

Customer service24/7 replies, Q&A

Pricing

More scale, deeper discounts

Simple prepaid pricing. The more you use, the more you save.

Standard

For developers and individuals

At least

50% off

GPT, Claude & DeepSeek
Pay per use, no subscription
Top up in USDC

Get started

Business

For large organisations

Custom pricing

Tailored rates

Exclusive, better discounts
More mainstream & domain models
Flexible partnership plans

Contact sales

Referral program

Lifetime rewards,
Web3 payouts

Invite once, earn forever. Every time someone you invited tops up, you get a share, paid in API credit or USDC with global stablecoin settlement.

Get your invite link

Lifetime revenue share

Permanent invite binding

Paid in API credit + USDC

Global Web3 settlement

FAQ

Questions, answered

Can't find what you need? Read the docs.

Are these really the official models?

Yes. Requests go directly to the official API under official model names, with no reverse-engineering, so output quality is identical.

How does billing work?

Xknwn is prepaid: top up credits and pay only for what you use. Every credit purchase is 50% off — 100 USDC gets you 200 credits, worth $200 of usage at official list prices.

Which endpoints are supported?

Use the base URL https://xknwn.io/v1 with your key as a bearer token. Chat Completions, Responses, Messages, Image generation and Gemini-style generateContent are available, depending on the model. Chat, Responses and Messages support streaming.

Which apps can I use my key with?

Cherry Studio, AionUI, CC Switch, DeepChat, AQBot, Lobe Chat, AI as Workspace, AMA 问天 and OpenCat, plus direct API calls from your own code.

Can I use it for model training?

Yes: CoT data generation, RL reward scoring, data synthesis, labeling and evaluation. Please follow each model's official terms of use.

How are referral rewards paid?

Invites are bound permanently, and you earn a lifetime share of their top-ups, paid as API credit or USDC.

AI made simple.

One key, one balance, pay as you go. Need more models or a better rate? Talk to us about business plans.

Get started Read the docs

Official AI models.Half the price.