OpenAI: GPT-5.1 has begun rolling out to all ChatGPT users this week

ChainCatcher News, according to an announcement from OpenAI, GPT-5.1 has begun rolling out to all Chat GPT users this week. This version features significant improvements in following custom instructions, reasoning accuracy, and conversational naturalness. GPT-5.1 supports adaptive reasoning, allowing it to intelligently extend thinking time for complex questions, resulting in clearer responses with less jargon. GPT-5 users can continue to use it for three more months, while the Pro version will be updated to GPT-5.1 Pro.