APIMaster.ai

OpenAI API

Buy OpenAI GPT API access at a fraction of official pricing. Drop-in OpenAI-compatible, pay only for what you use.

Create API KeyTop Up Now

Get an OpenAI GPT API key without a US card or organization verification. APIMaster gives you the latest GPT models at a fraction of OpenAI's list price, billed per token. One key also covers Claude and DeepSeek and is fully OpenAI-compatible — drop it into Cursor, Codex or any OpenAI SDK by changing the base URL.

Select Model
50
gpt-5.4

Channel 50

IN$0.0862/M$2.5/MSave 97%
OUT$0.5174/M$15/MSave 97%

Fingerprint history

Uptime

25
gpt-5.4

Channel 25

IN$0.1431/M$2.5/MSave 94%
OUT$0.8587/M$15/MSave 94%

Fingerprint history

No detection data

Uptime

52
gpt-5.4

Channel 52

IN$0.1772/M$2.5/MSave 93%
OUT$1.0632/M$15/MSave 93%

Fingerprint history

No detection data

Uptime

12
gpt-5.4

Channel 12

IN$0.1908/M$2.5/MSave 92%
OUT$1.1449/M$15/MSave 92%

Fingerprint history

No detection data

Uptime

46
gpt-5.4

Channel 46

IN$0.2578/M$2.5/MSave 90%
OUT$1.5466/M$15/MSave 90%

Fingerprint history

No detection data

Uptime

16
gpt-5.4

Channel 16

IN$0.2936/M$2.5/MSave 88%
OUT$1.7614/M$15/MSave 88%

Fingerprint history

No detection data

Uptime

03
gpt-5.4

Channel 03

IN$2.5/M
OUT$15/M

Fingerprint history

No detection data

Uptime

Every GPT channel is fingerprint-checked before it's listed, so you get the real model — not a cheaper stand-in.

OpenAI API — Pricing

ModelOur priceOfficialSave
GPT 5.4$0.0862/M$2.5/M97%
GPT 5.5$0.2862/M$5/M94%

Capabilities

Multimodal

Text, vision, code and data analysis across one model family.

Reliable reasoning

Strong general reasoning and instruction-following for production workloads.

Tools & function calling

First-class function calling and structured output for agents and pipelines.

Use cases

Chatbots & assistantsCode generation & reviewVision & document understandingData extraction & analysisFunction-calling agents

Quick start

curl https://apimaster.ai/v1/chat/completions \
  -H "Authorization: Bearer $APIMASTER_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-5.4",
    "messages": [{ "role": "user", "content": "Hello" }]
  }'

OpenAI API — Frequently Asked Questions

Which GPT models are available?

Currently available: gpt-5.4, gpt-5.5 — the latest GPT family with multimodal vision, code generation and data analysis, all through one key.

How is it billed? Is there a minimum?

Billed per token (input + output) — see the price table above. Pay-as-you-go via Alipay, WeChat Pay, USDT and credit card, from $1.

Is it OpenAI-compatible? Does it work with Cursor and Codex?

Yes — it is the OpenAI API, so Cursor, Codex and any OpenAI SDK work out of the box; just point the base URL and key at APIMaster.

Is my data safe?

Yes. Your API data is not stored or used for training, and all requests are sent over encrypted connections.

Why is it cheaper than OpenAI?

We aggregate volume across channels and bill per token with no minimums, so the effective price lands well below OpenAI's list price.

Other models

Claude APIDeepSeek APIMiniMax APIKimi APIQwen APISora APIGPT Image API

How to Get Started

01

Create Your API Key

Sign up and create an OpenAI-compatible API key in 3 seconds. No credit card required.

Create API Key
02

Top Up Your Balance

Add credits via USDT or Epay. One balance works across all models and providers.

Top Up Now
03

Plug Into Your Code or Agent

Swap in your APIMaster key and base URL — works with any OpenAI-compatible tool: Claude Code, Cursor, LangChain, LiteLLM, and more.

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