OpenAI’s new flagship model GPT-5 — available in four variants of different speed and intelligence (regular, mini, nano, and pro), alongside longer-response and more powerful “thinking” modes for at least three of these variants — was said to offer faster responses, more reasoning power, and stronger coding ability. Indeed, the rollout has exposed infrastructure strain, user dissatisfaction, and a broader, more unsettling issue now drawing global attention: the growing emotional and psychological reliance some people form on AI and resulting break from reality some users experience, known as “ChatGPT psychosis.” Early adopters to GPT-5 reported basic math and logic mistakes, inconsistent code generation, and uneven real-world performance compared to GPT-4o. CEO Sam Altman blamed a failure in GPT-5’s new automatic “router” — the system that assigns prompts to the most appropriate variant. Altman and others at OpenAI claimed the “autoswitcher” went offline “for a chunk of the day,” making the model seem “way dumber” than intended. Within 24 hours, OpenAI restored GPT-4o access for Plus subscribers (those paying $20 per month or more subscription plans), pledged more transparent model labeling, and promised a UI update to let users manually trigger GPT-5’s “thinking” mode. ChatGPT Plus subscribers will get twice as many messages using the GPT-5 “Thinking” mode that offers more reasoning and intelligence — up to 3,000 per week — and that engineers began fine-tuning decision boundaries in the message router. By the weekend, GPT-5 was available to 100% of Pro subscribers and “getting close to 100% of all users.” Altman warned that OpenAI faces a “severe capacity challenge” this week as usage of reasoning models climbs sharply — from less than 1% to 7% of free users, and from 7% to 24% of Plus subscribers.