Overview

• GPT-5 replaces GPT-3.5, GPT-4o and previous variants as the unified foundation powering ChatGPT for over 700 million free and paid users worldwide.
• It is offered in three optimized tiers—standard, GPT-5 Mini and GPT-5 Nano—to balance reasoning power, cost efficiency and response latency.
• The model delivers faster responses, more natural language generation, advanced coding assistance and a reduced rate of hallucinations.
• Users can choose from four optional conversational personalities and link their Gmail, Google Calendar and Contacts for context-aware interactions.
• Built-in safety features compel GPT-5 to acknowledge its limits and issue safe completions, and an autonomous agent mode is set to roll out for professional subscribers.