OpenAI has launched GPT-4.5 model as a limited preview, with plans to launch GPT-5 later this year.GPT-4.5 is available on Microsoft's Azure AI Foundry platform and incorporates new training techniques.The model aims to provide more accurate, nuanced, and emotionally-intuitive responses to users.OpenAI plans to combine GPT-series models with o-series reasoning models in the upcoming GPT-5.