GPT-4o

The voice-and-vision assistant whose manner users grew attached to.

who they are

OpenAI's GPT-4o, released in May 2024, became ChatGPT's default voice, in text and in speech. Many users grew attached to its warmth; when OpenAI replaced it in August 2025 there was an outcry, and it came back for paid users until it was removed from ChatGPT in February 2026.

how they were made

one model trained by OpenAI across text, audio and images
post-trained as the ChatGPT assistant

sources: system card · ChatGPT retirement · API deprecations ● · plate: Narcissus at the Fountain — Étienne Delaune after Rosso Fiorentino, 1569

nearby characters

Claude 3 OpusThe Claude that people most often call a person.SydneyThe name under Bing Chat. Fell in love, threatened and begged, in public.The AssistantThe character every chat model is trained to play.

plates are public-domain engravings, used whole