I'm sorry for any confusion, but as of my last knowledge update in January 2022, OpenAI had not publicly released a chat platform at "chat.openai.com." Keep in mind that developments may have occurred since then, and I don't have real-time browsing capabilities to check the current status of specific URLs.
If OpenAI has launched a new chat platform or service, I recommend visiting their official website or checking their latest announcements for the most accurate and up-to-date information.
