ChatGPT was launched as a prototype on November 30, 2022. It garnered attention for its detailed responses and articulate answers across many domains of knowledge. Its uneven factual accuracy, however, has been identified as a significant drawback. Following the release of ChatGPT, OpenAI's valuation was estimated at US$29 billion in 2023.

The original release of ChatGPT was based on GPT-3.5. A version based on GPT-4, the newest OpenAI model, was released on March 14, 2023, and is available for paid subscribers on a limited basis.
Given the introduction of ChatGPT, tell me how many releases there are since the fist launch and when they were launched.
There are two ChatGPT versions so far. The first release was on Nov 23rd, 2022, and the second launch was released on Mar 14th, 2023.