If you’ve ever opened ChatGPT and felt baffled by the alphabet soup of model names – like GPT-4o, o3, o4-mini – you’re not alone. OpenAI (the company behind ChatGPT) doesn’t exactly make ...

According to OpenAI's benchmarks, GPT-4.5 does show some improvements over GPT-4o in specific areas. The model scored higher on the multilingual MMMLU (general knowledge) test with 85.1 percent ...

OpenAI said on Monday that it would soon wind down the availability of GPT-4.5, its largest-ever AI model, via its API. GPT-4.5 was released only in February. Developers will have access to GPT-4.5 ...

We will next ship GPT-4.5, the model we called Orion internally, as our last non-chain-of-thought model. In both ChatGPT and our API, we will release GPT-5 as a system that integrates a lot of our ...

OpenAI announced on Wednesday that GPT-4.1 will be available across all paid ChatGPT account tiers and can now be accessed by Plus, Pro, or Team users under the model picker dropdown menu.

In addition, with the advent of GPT-4.1, the previous 'GPT-4.5 Preview' model has been decided to be discontinued on the API on July 14, 2025, and developers are being given a transition period.

OpenAI has officially integrated its flagship GPT-4.1 model into ChatGPT, making it available to Plus, Pro, and Team subscribers starting today. The company announced the rollout on X (Twitter ...

Note that GPT-4.5 is not a reasoning model like o1 or o3-mini. It is better for general purpose use, and is built using pre-training and post-training.