OpenAI GPT-5.5 Instant Upgrade, GPT-4.5 & o3 Retired

OpenAI is upgrading its GPT-5.5 Instant model and retiring older models like o3 and GPT-4.5. The company shared this news in updated release notes. The GPT-5.5 Instant model now offers improved response quality and a more natural writing style. Its answers are shorter, less reliant on bullet points, and designed to sound more human. It also enhances pacing for practical help tasks, aiming for a more conversational feel. GPT-4.5 will be retired on June 27th, and o3 will follow on August 26th. These models are currently only for paid ChatGPT users. What's interesting is OpenAI is also adding a new job search feature to ChatGPT. This allows users to find live job listings and freelance opportunities from various sources. It can also help create and edit resumes. These changes are rolling out gradually worldwide. This means users should prepare for changes in how they interact with ChatGPT, especially if they use the older models.