ChatGPT users dismayed as OpenAI pulls popular models GPT-4o, o3 and moreenterprise API remains (for now)

OpenAI has revealed that GPT-5 will be the new underlying model powering all versions of ChatGPT, marking a significant upgrade in their AI infrastructure. This transition aims to enhance performance and capabilities across the platform, although it has elicited nostalgia among users who appreciated the previous workhorse model.