OpenAI Launches GPT-5.1: Adaptive Reasoning, 6 Personality Presets, and Group Chats After Mixed GPT-5 Reviews

OpenAI releases GPT-5.1 Instant and Thinking just 3 months after GPT-5, adding adaptive reasoning, warmer tone, 6 personality presets, and piloting group chats for up to 20 people in select regions.