Just hours before OpenAI's "12 days of shipmas" event, a staging page on the company's website has seemingly revealed the first major announcement: ChatGPT Pro, a premium subscription plan that promises unlimited access to OpenAI's advanced models. The discovery was made by software engineer Tibor Blaho, who stumbled upon the page and shared his findings on social media.

According to the leaked page, ChatGPT Pro will offer users unlimited access to all of OpenAI's models, including the full version of its o1 "reasoning" model, o1-mini, and GPT-4o. This is a significant upgrade from the current ChatGPT Plus plan, which has limitations on model access. Additionally, ChatGPT Pro subscribers will get unlimited access to Advanced Voice Mode, ChatGPT's human-like conversational feature, and a new "o1 pro mode" that utilizes more compute power to provide the best answers to the hardest questions.

However, this enhanced access comes at a steep price. The leaked page suggests that ChatGPT Pro will start at $200 per month or £200/€229, depending on the region. This makes it OpenAI's most expensive subscription plan yet, and a whopping 10 times the cost of ChatGPT Plus. It remains to be seen whether the added features and unlimited model access will justify the hefty price tag for users.

In a separate leak, Blaho also uncovered a page mentioning OpenAI's next major model, GPT-4.5. According to the page, subscribers to OpenAI's ChatGPT Team plan will soon get access to a "limited preview" of GPT-4.5. While details about this new model are scarce, the mention of a limited preview suggests that OpenAI is gearing up to release a significant update to its language processing capabilities.

The leaks come just ahead of OpenAI's "12 days of shipmas" event, which promises to bring a slew of new announcements and updates from the company. While the leaked pages have given us a glimpse into what's to come, we'll have to wait for official confirmation from OpenAI to get the full details.

The implications of ChatGPT Pro and GPT-4.5 are significant, as they could further solidify OpenAI's position as a leader in the artificial intelligence and natural language processing space. With the AI landscape rapidly evolving, it will be interesting to see how these new developments shape the industry and influence the development of future AI models.

Stay tuned for further updates and analysis as more information becomes available.