On Thursday, February 27, 2025, OpenAI has just taken another giant leap forward with the release of their much-anticipated AI model ChatGPT 4.5, aka "Orion." They said ChatGPT 4.5 is now available as a research preview. This latest OpenAI ChatGPT 4.5 is not just an incremental update; it’s a significant advancement in the world of conversational AI. As OpenAI’s largest and most capable chat model yet, GPT-4.5 builds on cutting-edge techniques in pre-training and post-training to deliver more intelligent, intuitive, and reliable answers.
In this article, we’ll dive deep into what makes ChatGPT 4.5 a game-changer, explore its key features, discuss its practical applications, and examine how it could shape the future of AI conversations. Now, whether you are a tech enthusiast or a professional AI user who is curious about the next big thing in AI, explore this article on ChatGPT 4.5.
What is ChatGPT Code Name "Orion"?
ChatGPT 4.5, also known as Orion, is OpenAI’s newest upgrade to its smart language models. It builds on GPT-4 by adding several improvements. For example, it understands emotions better, so it can pick up on social cues and have more natural conversations. It also makes fewer mistakes this means it is less likely to give wrong or made-up answers. Plus, ChatGPT 4.5 can now work with images and files in addition to text. It has been trained even more carefully, so it follows conversations better and can solve tough math, science, and logic problems more effectively. Right now, it’s available as a preview for some ChatGPT Pro users and selected developers, and more people will get access soon.
ChatGPT 4.5, code name Orion, is OpenAI’s newest upgrade to its smart language models. It builds on GPT-4 by adding several improvements. It builds upon the capabilities of GPT-4 by adding several improvements. The new AI model shows improved emotional intelligence (EQ), so it can pick up on social cues and have more natural conversations
Additionally, GPT-4.5 features a significantly reduced hallucination rate, this means it is less likely to give wrong or made-up answers. Plus, ChatGPT 4.5 can now work with images and files in addition to text. It has been trained even more carefully, so it follows conversations better and can solve complex STEM and logic problems more effectively. But the actual catch is that, ChatGPT 4.5 is only available for research preview to ChatGPT Pro users and select developers
What is New About ChatGPT 4.5
Accourding to OpenAI ChatGPT 4.5 "Orion" is one the most advanced AI model till date and comes with new inhancement. So, lets explore this section to know whats new in this model and why is called as a largest model of OpenAI.
- Advanced Reasoning Techniques: GPT-4.5 incorporates "scaling reasoning," enabling the model to generate a chain of thought before responding. This approach allows the model to tackle complex STEM or logic problems more effectively
- Enhanced Emotional Intelligence: GPT-4.5 "Orion" is designed to recognize and respond to social cues more adeptly, making interactions feel more natural and human-like.
- Reduced Hallucination Rate: The model exhibits a lower tendency to generate incorrect information, with a hallucination rate of 37.1%, a significant improvement over previous models like GPT-4o, which had a rate of 61.8%.
- Multimodal Capabilities: GPT-4.5 supports file and image uploads, allowing users to engage with the model using various input types beyond text.
- Improved Contextual Understanding: The model has been trained on data derived from smaller models, enhancing its ability to grasp nuances and align more effectively with user intent.
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Preformance Benchmark of ChatGPT 4.5
Unlike the o‑series models that use COT (chain‑of‑thought) method where they break down complex problems step by step ChatGPT 4.5 relies on unsupervised learning. Because from the staring OpenAI made it clear the upcomming GPT‑4.5 is not meant to be a master of reasoning. In other words, it generates answers based on its natural feel for language rather than following strict logical steps.
This approach shows in its performance. While GPT‑4.5 is more accurate and provides more correct information than earlier models, it isn’t as strong when it comes to structured problem‑solving.
Comparision Between Accuracy and Hallucinations
For example, on a simple knowledge test called SimpleQA, GPT‑4.5 scored 62.5%—a lot higher than GPT‑4o’s 38.2%, OpenAI o1’s 47%, and OpenAI o3‑mini’s 15%.
ChatGPT Accuracy Bargraph
Date Source OpenAI
ChatGPT Hallucinations Bargraph
Date Source OpenAI
Now, after analysing this data you can say that ChatGPT‑4.5 makes fewer mistakes than earlier OpenAI models like ChatGPT 4.5, ChatGPT , but it still isn’t perfect when it comes to accuracy—about 37.1% of its answers might still be wrong.
Everyday Use Test Case
OpenAI compared GPT‑4.5 to GPT‑4o by having human testers review their answers to different questions. The tests showed that people preferred GPT‑4.5 most of the time, especially for professional questions, where it won 63.2% of the time.
Complex Reasoning Performance
Although GPT‑4.5 is better at handling facts and maintaining smooth conversations, it still struggles with tasks that require heavy reasoning, like math, science, and structured coding. Tests show that while it performs better than GPT‑4o, it isn’t as strong as OpenAI’s o3‑mini, which is specifically tuned for solving logic problems.
Benchmark | GPT-4.5 | GPT-4o | OpenAI o3‑mini (high) |
|---|---|---|---|
GPQA (science) | 71.4% | 53.6% | 79.7% |
AIME ‘24 (math) | 36.7% | 9.3% | 87.3% |
MMMLU (multilingual) | 85.1% | 81.5% | 81.1% |
MMMU (multimodal) | 74.4% | 69.1% | - |
SWE-Lancer Diamond (coding) | 32.6% $186,125 | 23.3% $138,750 | 10.8% $89,625 |
SWE-Bench Verified (coding) | 38.0% | 30.7% | 61.0% |
The above score shows that ChatGPT 4.5 code name Orion is not best choice for advanced reasoning. In the above table ChatGPT 4.5 does not score good in math, logic, and programming tasks.
How to Use ChatGPT 4.5
As we said in the above section that due to limited GPU resources, GPT‑4.5 is being released gradually. Pro users get access first, then Plus users next week as OpenAI increases its capacity. Also as per the news enterprise and educational users will see access in the coming weeks.
Once you have access, you can select GPT‑4.5 from the model picker. It works with ChatGPT’s newest features like uploading files and images, searching, and using the canvas tool for writing and coding. However, features such as Voice Mode, video processing, and screensharing aren’t available yet in ChatGPT.
How to Access GPT 4.5 API
Developers can now access GPT‑4.5 through multiple APIs, including the Chat Completions API, Assistants API, and Batch API. This model comes with advanced features like function calling, structured outputs, system messages, streaming, and even vision support.
However, GPT‑4.5 is a very large, compute-heavy model, which means it costs more to run than earlier versions. Additionally, OpenAI hasn't decided if GPT‑4.5 will be a permanent option, so its future availability might depend on feedback from developers.
Pricing: If we talk about the pricing then ChatGPT 4.5 is one of the most expensive it will cost Input $75.00 Cached Input $37.50 Output $150.00
Conclusion
In our test GPT-4.5 looks very promising to recognize and respond to social cues more adeptly, making interactions feel more natural and human-like. But if we talk about the reasoning then there are many others OpenAI modle works better than this model. In this article we have tested the new OpenAI model ChatGPT 4.5 code name Orion Now, for users who prioritize conversation flow and clarity, GPT-4.5 is a step up. But for anything requiring deep logic, better options exist.