01 / 01Oct 23, 2026GPT-4o and GPT-4.1 API Retirement: The January 14 Migration ChecklistGPT-4o and GPT-4.1 leave OpenAI's API on January 14, 2027, with 92 days notice. My 10-point checklist: audit, dodge the Luna tool-call trap, and switch safely.Oct 23, 2026·10 min read10 min read#openai#gpt-4o#llm-apis#ai-agents→