OpenAI Releases GPT-5.1 With New Instant and Thinking Variants for Paid Users

OpenAI rolled out GPT-5.1, introducing Instant and Thinking versions designed to improve speed, reasoning, and task accuracy across coding, math, and enterprise workflows. Paid users received immediate access to the upgraded models alongside expanded customization features and enhanced chat controls. The company confirmed that additional capabilities will reach free-tier accounts in the coming phases. The update strengthens OpenAI’s competitive positioning as AI adoption accelerates across global markets. Developers and businesses cited improved reliability, faster inference, and more predictable output as key benefits.