OpenAI: Goodbye, GPT-4o

On February 13, 2026, OpenAI officially ends support for GPT-4o and GPT-4.1 models in the ChatGPT interface. Users are forcibly migrated to new, more efficient versions.

This is a classic software lifecycle: supporting a zoo of old versions slows down progress. OpenAI is consolidating computing resources on flagship models, sacrificing user nostalgia for efficiency and speed.

Source: OpenAI Blog