Get an OpenAI API key for all your AI models

What you can do with an OpenAI API key

An OpenAI API key gives you programmatic access to large language models. Instead of using ChatGPT in a browser, you send requests from your own code, tools, or applications and receive structured responses. The API supports text generation, code writing, image understanding, function calling, structured outputs, and more.

With one key, you can power coding agents (Codex, Cline, Claude Code), build chatbots, generate content, run data analysis pipelines, create automation workflows, and integrate AI into any application. The OpenAI-compatible protocol is the standard — most AI tools support it.

OpenAI API key: Direct vs APItokendeal

There are two main ways to get an API key that works with OpenAI-compatible tools. Here is how they compare:

How to get your API key in 5 minutes

Step 1: Sign up

Create a free account at apitokendeal.com/register. You receive 2.5M free tokens instantly — enough to test all supported models with your tools.

Step 2: Copy your API key

After signup, go to your account dashboard. Your API key is displayed there. Copy it and store it securely (password manager or environment variable).

Step 3: Configure your tool

Set the base URL and API key in your tool or code:

Python example

from openai import OpenAI

client = OpenAI(
    base_url="https://api.apitokendeal.com/v1",
    api_key="your_apitokendeal_key"
)

response = client.chat.completions.create(
    model="gpt-5.4",
    messages=[{"role": "user", "content": "Hello!"}]
)
print(response.choices[0].message.content)

Cline / OpenCode / Codex setup

1. Open your tool's settings or config file
2. Set the API base URL to https://api.apitokendeal.com/v1
3. Paste your APItokendeal API key
4. Select a model from the model catalog
5. Save and start using

Token pack pricing

APItokendeal uses prepaid token packs instead of postpaid billing. You buy tokens upfront, spend against your balance, and top up when needed. Paid packs have no expiry.

Savings compared to official per-token rates. Token weightage varies by model — see the full model catalog for details.

Official OpenAI pricing reference

For comparison, here are the current official OpenAI per-token rates (September 2026):

Source: OpenAI official pricing as of September 2026.

Supported tools and coding agents

APItokendeal works with any tool that supports OpenAI-compatible APIs. Popular integrations include:

Why prepaid beats postpaid for API costs

Direct OpenAI billing is postpaid: you use the API and pay at the end of the month. This creates three problems for developers and teams:

• Surprise bills. A coding agent session that runs longer than expected, a batch job that processes more data than planned, or a script with an infinite loop can generate a large bill before anyone notices.
• No hard ceiling. OpenAI's spending limits are soft caps — they notify you but do not always stop the charges. A prepaid balance physically cannot be exceeded.
• Multiple providers, multiple bills. If you use GPT, Claude, and DeepSeek, you have three separate accounts, three payment methods, and three invoices to reconcile.

APItokendeal's prepaid model solves all three: your balance is your ceiling, you see all model usage in one dashboard, and you top up when you choose. No invoices, no surprises, no multiple accounts.

Frequently asked questions

How do I get an OpenAI API key?

Go to platform.openai.com, sign in, navigate to Settings > API Keys, and click Create new secret key. Copy the key immediately — it is only shown once. Add a payment method under Billing to start making API calls. Alternatively, sign up at apitokendeal.com for one key that works across GPT, Claude, DeepSeek, and 30+ models.

What is an OpenAI-compatible API key?

An OpenAI-compatible API key is a key that works with the OpenAI API protocol — the same format used by OpenAI's own API. Third-party providers like APItokendeal use this protocol so their keys work with the same tools, libraries, and code that support OpenAI's API. You just change the base URL and API key.

Is there a cheaper alternative to the OpenAI API?

Yes. APItokendeal offers OpenAI-compatible API access with prepaid token packs from $9.99, one key for 30+ models, and a unified usage dashboard.

How much does an OpenAI API key cost?

The API key itself is free. You pay per token when making API calls. Official OpenAI pricing ranges from $0.75/MTok (GPT-5.4 Mini input) to $50/MTok (GPT-6 Astra output). Via APItokendeal, prepaid token packs offer up to 70% off these rates.

Can I use one API key for multiple AI models?

Yes. With APItokendeal, one API key works across GPT, Claude, DeepSeek, Gemini, Kimi, Qwen, MiniMax, and more. Switch models anytime without changing your key. With direct OpenAI, you only get access to OpenAI models.

How do I use an OpenAI API key with coding agents?

Most coding agents (Codex, Cline, Claude Code, OpenCode) support OpenAI-compatible APIs. Set the base URL to your provider's endpoint, enter your API key, and select a model. For APItokendeal, use https://api.apitokendeal.com/v1 as the base URL.