model migration

Model migration refers to the process of transitioning AI models from one version to another, as seen when OpenAI retired GPT-5.2 and moved conversations to GPT-5.5. This tag covers the implications for ChatGPT users and developers, including verifying that tuned prompts and automations remain functional after a model swap. Discussions highlight that such migrations can be subtle but consequential, as underlying model behavior may shift even if the user interface changes minimally. The tag is relevant for those tracking AI model lifecycle management, compatibility testing, and the operational impact of model deprecations on workflows.