OpenAI Launches GPT-5, Claiming PhD-Level Expertise for ChatGPT

OpenAI has officially unveiled GPT-5, the latest and most advanced version of its AI language model powering ChatGPT. CEO Sam Altman described the upgrade as delivering “PhD-level” expertise across a vast range of topics, available instantly on demand (The Guardian, Axios).

The new model offers significant improvements in accuracy, reasoning, and domain-specific knowledge, while reducing “hallucinations” — the AI term for false or misleading outputs (Wired). GPT-5 can now handle more complex tasks in areas such as advanced coding, creative writing, medical analysis, and data interpretation.

OpenAI has also introduced specialized modes like GPT-5-Thinking for deep problem-solving and lighter versions such as Mini and Nano for faster, cost-efficient responses (OpenAI Official Blog).

With these upgrades, ChatGPT continues to blur the line between human-level expertise and AI capability — a move that could reshape industries from education to professional consulting.