OpenAI researchers said the new model was the company’s “best chat model yet,” citing an improved knowledge base and better contextual understanding.

OpenAI has just released GPT-4.5, a new version of its flagship large language model. The company claims it is its biggest ...

OpenAI has begun rolling out its newest and largest AI model, GPT-4.5, to users on the company's ChatGPT Plus tier.

Later this year, OpenAI expects to introduce GPT-5 as a single that handles quick chat requests and more intensive reasoning requests without switching models. For now, GPT-4.5 is here to replace ...

GPT-4.5 is not a Frontier model ... via the Azure AI Foundry platform and is available for developers in the Chat Completions API, Assistants API and Batch API.