Overview

• Within 24 hours of GPT-5’s launch, users complained about a colder personality and the sudden removal of GPT-4o, leading OpenAI to reinstate the legacy model for subscribers.
• A malfunction in GPT-5’s router initially directed queries to weaker engines, causing inconsistent responses that deepened user dissatisfaction.
• GPT-5 remains the default for free users while OpenAI iterates on personality settings and autoswitcher reliability to restore service quality.
• Startups like Cursor, Vercel and Factory have already adopted GPT-5 as their default for coding, reasoning and multi-agent tasks, driving API usage sharply higher.
• Researchers and clinicians caution that abrupt model retirements can harm users with parasocial attachments, urging more thoughtful transition practices.