OpenAI Released ChatGPT 4.5 Today, Following Confirmation of ChatGPT 5 with Unlimited Prompts

The CEO of OpenAI, Sam Altman, recently confirmed the future models including ChatGPT 4.5 and ChatGPT 5 with unlimited messages for free tier! The plan is to release stable version of GPT-4.5 and GPT-5 by Q4, 2025. However, OpenAI launched ChatGPT 4.5 preview today February, 26, 2025.

Here is a summary of OpenAI’s roadmap and featrues:

ChatGPT GPT-5 model confirmed
ChatGPT GPT-4.5 model confirmed
Free unlimited chat messages for free tier!
Plus subscribers will get higher level of intelligence in GPT-5
Pro subscribers with even higher level of intelligence in GPT-5

If this isn’t exciting enough, OpenAI just released the promised GPT-4.5 — internally known as Orion — to the public today. After the internal testing, ChatGPT 4.5 preview is now open to paid users at first, later rolled out to free users. GPT-5 is also in the works but may take some time for a public release.

Some users will see a popup to Try the GPT-4.5 research preview. Pro users can now access the newest, largest models.

Sam Altman posted on X (formerly known as Twitter) emphasizing the need for AI to “just work” for users, eliminating the complexities inherent in navigating a maze of models.

The CEO also emphasized that the naming of the current models is quite confusing for users, and will be reverting to the conventional numbering system. So the next models will be ChatGPT 4.5 and ChatGPT 5.

Open AI is also unifying different product lines and integrating advanced functionalities. It aims to bring us closer to “magic unified intelligence” that feels intuitive and powerful.

OPENAI ROADMAP UPDATE FOR GPT 4.5 and GPT 5 — Sam Altman on OPENAI ROADMAP UPDATE FOR GPT-4.5 and GPT-5

ChatGPT 5

The upcoming GPT-4.5 and GPT-5 update signals a major shift away from the cumbersome array of models and towards a more intuitive, integrated system.

The announcement reveals that GPT-4.5, internally known as Orion, is set to be the final model in the current chain-of-thought series. This iteration serves as a bridge, easing the transition to the more advanced and unified GPT-5 system.

OpenAI’s emphasis is on reducing the friction experienced by users, who have long been frustrated by the need to choose between multiple models. With GPT-4.5, the goal is to simplify interactions so that the right AI tool is used automatically, without requiring deep technical knowledge or constant adjustments.

GPT-5 represents a bold leap into a unified future where various AI functionalities are seamlessly integrated. Unlike previous models, GPT-5 is designed to be a comprehensive system that not only incorporates improved reasoning and processing capabilities but also integrates features such as voice, canvas, search, and deep research. This all-in-one approach means that users will experience a single, robust interface that can adapt to a wide range of tasks. The transition includes phasing out standalone models like o3, with GPT-5 serving as the central hub that intelligently selects the most appropriate tools for any given query.

ChatGPT will offer unlimited access to free users

For end-users, these updates are a blessing. The free tier of ChatGPT will offer unlimited access to GPT-5 at a standard level of intelligence, ensuring that state-of-the-art AI is available to a broad audience. Meanwhile, Plus and Pro subscribers will benefit from even higher levels of processing power and refined outputs.

Not sure what this means for developers, and enterprises as of right now. With ChatGPT being free with unlimited messages, it is unlikely that the API will be free and unlimited as well. Let’s see what the future holds. Stay tuned!