gpt-5.2 retirement

The gpt-5.2 retirement tag covers the June 2026 removal of GPT-5.2 from standard ChatGPT availability by OpenAI. This change moved older GPT-5.2 conversations to GPT-5.5 models and required developers to verify that tuned prompts and automations still function correctly. The retirement is described as less dramatic than a product launch but more consequential than a routine UI tweak, serving as a reminder that AI software is built on shifting ground. The tag focuses on the practical impact for ChatGPT users and developers, including model routing changes and the need to test workflows after the model swap.