The moment we’ve been waiting for has finally arrived: OpenAI is releasing GPT-4. 5, a major breakthrough in artificial intelligence. However, while OpenAI refers to GPT-4.5 as its “largest and most knowledgeable model,” there are a few caveats that could keep you using its older models for the time being.
OpenAI Introduces GPT-4.5 With a More “Natural” Feel
So first, here is the bright side of this update. OpenAI claims GPT-4.5 boasts a “broader knowledge base” and a better “alignment of user intent.” It also reportedly includes new human-like characteristics that make it more capable of performing complex work like writing, programming and solving real life problems.
One of the important upgrades is GPT-4. 5’s decreased propensity to hallucinate. OpenAI claims that it has reduced its hallucination rate from 60% for GPT-4o to 37%.
Interestingly, OpenAI’s team that tests things internally found GPT-4. 5 “warm, intuitive and natural.” That suggests the model is tuned to lean more toward personality, empathy and creativity than its predecessors.
The Downsides of GPT-4.5
Even with the upgrades, OpenAI says that GPT-4.5 isn’t ready to replace its predecessors fully.
For one, GPT-4. And 5 is a giant leap up, more computation intensive and therefore more expensive to run. None of the above, although responses may be slower than the turbocharged GPT-4o version. GPT-4 reflects the higher compute requirements. 5’s API pricing, which is significant compared to previous versions.
Beyond speed and cost, GPT-4.5 cannot do many of the multimodal stuff that has made ChatGPT so powerful. When it came out, it didn’t have Voice Mode, video tools, or screen sharing. OpenAI has not offered a timetable on when these abilities will be built into GPT-4. 5.
OpenAI also says that GPT-4. 5″ is “not an frontier model” and that its performance “is worse than o1, o3-mini, and deep research on most preparedness evaluations.” This means that when GPT-4. GPT-3.5 may not perform better than some of OpenAI’s other recent models in certain tasks, despite being a powerful tool.
When Can You Access GPT-4.5?
-> GPT-4 from February 27, 2025. 5 is being rolled out to ChatGPT’s $200 Professional subscription tier. It is available immediately to professional subscribers via the model picker. By early March, GPT-4.5 becomes available to ChatGPT Plus and Team subscribers, then Enterprise and Edu users.
A Stepping Stone to GPT-5
GPT-4.5 is seen as a bridge towards the strongly anticipated GPT-5, which is slated to debut in 2025. The combination of GPT-4, GPT-3, o3-mini, and other models precedes designs that many consider the first AI system to reach artificial general intelligence (AGI).
While GPT-4.5 is a tremendous advancement, its limitations show that OpenAI continues to develop its technology. The next major evolution of AI may not be too far off.
