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.
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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
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 — Pertanyaan yang Sering Diajukan
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
Cara Memulai
Isi Saldo Anda
Tambahkan kredit melalui USDT atau Epay. Satu saldo berfungsi di semua model dan penyedia.
Top Up SekarangBuat API Key Anda
Daftar dan buat API Key yang kompatibel dengan OpenAI dalam 3 detik. Tidak perlu kartu kredit.
Buat API KeySambungkan ke Kode atau Agent Anda
Tukar dengan kunci APIMaster dan base URL Anda — berfungsi dengan alat apa pun yang kompatibel dengan OpenAI: Claude Code, Cursor, LangChain, LiteLLM, dan lainnya.
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