As of my last knowledge update in September 2021, OpenAI offers a subscription service called "ChatGPT Plus," which provides enhanced access to the ChatGPT platform. However, it's important to note that the details of the service, including its availability and features, may have changed since then. Here's what I can provide based on my last update:

ChatGPT Plus:

1. Subscription Service: ChatGPT Plus is a subscription plan that provides subscribers with special benefits when using the ChatGPT platform.

2. Cost: As of my last update, ChatGPT Plus was available for $20 per month. This subscription fee provided users with certain advantages, including general access to ChatGPT even during peak times.

3. General Access: One of the primary benefits of ChatGPT Plus was that subscribers received general access to the ChatGPT platform, which means they could use it without being subject to any capacity limits or restrictions during peak usage hours.

4. Faster Response Times: Subscribers to ChatGPT Plus were expected to receive faster response times from the system, which can be especially helpful when using the platform for real-time interactions and productivity.

5. Availability: ChatGPT Plus was initially made available to customers in the United States and around the world.

6. Monthly Billing: The subscription was billed on a monthly basis, and subscribers could cancel at any time.

Please keep in mind that the details of subscription plans and service offerings can change over time. To get the most up-to-date information on ChatGPT Plus, including its current features, pricing, and availability, I recommend visiting the official OpenAI website or contacting OpenAI directly. OpenAI may have introduced new plans, features, or changes since my last knowledge update in September 2021.