OpenAI API

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

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.

View all models

Modell wählen

gpt-5.4

Anbieter 94

IN$0.15/M$2.5/M94% sparen

OUT$0.9/M$15/M94% sparen

Fingerprint-Verlauf

Uptime

Keine Erkennungsdaten

gpt-5.4

Anbieter 25

IN$0.1982/M$2.5/M92% sparen

OUT$1.189/M$15/M92% sparen

Fingerprint-Verlauf

Uptime

gpt-5.4

Anbieter 52

Codex only

IN$0.1983/M$2.5/M92% sparen

OUT$1.1897/M$15/M92% sparen

Fingerprint-Verlauf

Uptime

gpt-5.4

Anbieter 11

Codex only

IN$0.2762/M$2.5/M89% sparen

OUT$1.6571/M$15/M89% sparen

Fingerprint-Verlauf

Uptime

gpt-5.4

Anbieter 12

Codex only

IN$0.2936/M$2.5/M88% sparen

OUT$1.7614/M$15/M88% sparen

Fingerprint-Verlauf

Uptime

gpt-5.4

Anbieter 16

IN$0.2936/M$2.5/M88% sparen

OUT$1.7614/M$15/M88% sparen

Fingerprint-Verlauf

Uptime

gpt-5.4

Anbieter 46

IN$0.3319/M$2.5/M87% sparen

OUT$1.9912/M$15/M87% sparen

Fingerprint-Verlauf

Uptime

gpt-5.4

Anbieter 03

IN$2.5/M

OUT$15/M

Fingerprint-Verlauf

Uptime

gpt-5.4

Anbieter 38

IN$2.5/M

OUT$15/M

Fingerprint-Verlauf

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

Model	Our price	Official	Save
GPT 5.4	$0.15/M	$2.5/M	94%
GPT 5.5	$0.1475/M	$5/M	97%
GPT 5.6 Sol	$0.2/M	$5/M	96%
GPT 5.6 Terra	$0.1/M	$2.5/M	96%
GPT 5.6 Luna	$0.06/M	$1/M	94%

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 — Häufig gestellte Fragen

Which GPT models are available?

Currently available: gpt-5.4, gpt-5.5, gpt-5.6-sol, gpt-5.6-terra, gpt-5.6-luna — 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 API DeepSeek API MiniMax API Kimi API Qwen API GLM API Doubao Seed API Sora API Seedance API Kling Motion Control API Nano Banana API GPT Image API

Erste Schritte

Guthaben aufladen

Fügen Sie Guthaben per USDT oder Epay hinzu. Ein Guthaben funktioniert für alle Modelle und Anbieter.

Jetzt aufladen

Erstellen Sie Ihren API Key

Melden Sie sich an und erstellen Sie in 3 Sekunden einen OpenAI-kompatiblen API Key. Keine Kreditkarte erforderlich.

API Key erstellen

Integrieren Sie in Ihren Code oder Agenten

Tauschen Sie Ihren APIMaster-Key und die base URL aus – funktioniert mit jedem OpenAI-kompatiblen Tool: Claude Code, Cursor, LangChain, LiteLLM und mehr.

Dokumentation anzeigen