AI Developer News: OpenAI Retires GPT-4o, Reflection Open-Sources Beam 501B — Week Ending October 17, 2026
This week’s AI developer news is a story of endings and openings at the same time: OpenAI is pulling GPT-4o and GPT-4.1 out of its API, GitHub Copilot is retiring three more models in November, and — in the same breath — four open-weight models landed from NVIDIA, Reflection AI and Liquid AI, including a … Read more