How to Top Up and Get API Keys for AI Models

Artificial intelligence is rapidly advancing across many different platforms. OpenAI, Gemini, and DeepSeek are three leading AI platforms that provide powerful APIs, allowing developers to integrate large language models into their applications. Below is a brief guide on how to top up and get API keys from these three platforms.

1. OpenAI

Log in/Register

• Go to: https://chat.openai.com
• Log in: Select "Login" in the top-right corner
• Create a new account: Select "Sign Up" if you do not have an account yet

Top up

1. Log in to your OpenAI account
2. Select "Settings", then choose "Billing"
3. Click "Add to Credit Balance" (minimum $5)
4. Enter your credit card details or pay via PayPal
5. Confirm the payment

Get the API Key

1. After logging in through the interface at https://platform.openai.com/settings/organization/api-keys
2. Select "Create new secret key"
3. Name the API key (for example: "demo API key")
4. Click "Generate" to create the API key
5. Copy and store the API key in a safe place (you will not be able to view this key again after closing the page)

2. Gemini

Log in/Register

• Go to: https://gemini.google.com/app?hl=vi
• Log in: Select "Log in" with your Google account
• Verification: Complete 2-step verification if required

Get the API Key

1. Go to Google AI Studio at https://aistudio.google.com/apikey
2. Log in with your Google account
3. Click "Get API Key" and accept the terms of service
4. Select "Create API Key"
5. If you already have a previous project, select a project to manage the new API key
6. Copy the API key and store it securely

Top up

1. After getting the API key, go to your project
2. Click the "Google Cloud" icon in the left corner of the browser
3. Select "Billing" → "Link a billing account"
4. Select "Create billing account" → choose your country → "Agree & Continue"
5. Enter your payment information and complete the setup

3. DeepSeek

Log in/Register

• Go to: https://www.deepseek.com or https://chat.deepseek.com
• Create a new account:
• 1. Select "Sign Up" on the homepage
  2. Enter your email, password, and confirm your password
  3. Receive the verification code by email and enter it
  4. Or log in with your Google account

Top up

1. Log in to your DeepSeek account
2. Click "API Platform" on the right sidebar
3. Select "Top up" from the left menu
4. Choose the amount you want to add ($2, $5, or a custom amount)
5. Select a payment method (credit/debit card or PayPal
6. Complete the payment

Get the API Key

1. Log in to your DeepSeek account
2. Select the "API Keys" section on the left sidebar
3. Click it to create a new API key
4. Copy and store the API key in a safe place

Pricing information

OpenAI

• Prices vary depending on the model used
• o3-mini model: $0.55/million input tokens, $4.4/million output tokens

DeepSeek

• DeepSeek-Chat (V3): $0.27/million input tokens, $1.1/million output tokens
• DeepSeek-Reasoner (R1): $0.55/million input tokens, $2.19/million output tokens
• 50-75% discount during 16:30-00:30 UTC every day

Gemini

• Free and paid versions are available
• Business plans start from $18/user/month (annual billing) or $20/month (monthly billing)

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