OpenAI Unleashes GPT-5.1: A Game-Changing Leap in ChatGPT Personalisation

OpenAI is rolling out GPT-5.1, a major upgrade that boosts speed, enhances reasoning, and expands personalisation in ChatGPT. The release includes GPT-5.1 Instant for natural conversation and GPT-5.1 Thinking for complex tasks with adaptive reasoning. Users get improved tone controls and presets, and both models will be available through the API later this week.