OpenAI Retires GPT-5.2 Chat Latest and GPT-5.3 Chat Latest API Models

OpenAI is retiring its older API models, GPT-5.2 Chat Latest and GPT-5.3 Chat Latest, effective today, August 10, 2026. Developers are advised to migrate to the recommended replacement, gpt-5.6-sol, and conduct thorough regression testing to ensure compatibility and performance. This deprecation is part of OpenAI's ongoing efforts to introduce safer and more capable models.