updating GPT-5 to GPT-5.1 Instant and GPT-5.1
ChatGPTOpenAI
November 12, 2025
GPT-5.1 in ChatGPT
We’re updating GPT-5 to GPT-5.1 Instant and GPT-5.1 Thinking, making answers both smarter and more conversational. GPT-5.1 Instant now uses light adaptive reasoning for tougher questions while staying fast, and GPT-5.1 Thinking adapts its thinking time more precisely for complex tasks with clearer, less jargony responses.
GPT-5.1 Auto continues to route each query to the best model, and GPT-5 models remain available for three months under the Legacy models dropdown so you can compare and transition at your own pace.
GPT-5.1 Instant and Thinking are rolling out first to paid (Pro, Plus, Go, Business) users, then to free and logged-out users, with Enterprise and Edu getting a temporary early-access toggle; GPT-5.1 will also be available soon in the API as gpt-5.1-chat-latest (Instant) and gpt-5.1 (Thinking).
New tone and personalization controls
We’re updating ChatGPT’s tone controls so it’s easier to make responses sound the way you prefer. You can now choose from updated presets like Default, Friendly, Efficient, Professional, Candid, and Quirky (with Cynical and Nerdy still available), and we’re experimenting with more granular controls over how concise, warm, or scannable responses are, plus how often emojis appear.
Changes you make in Personalization now apply across all chats immediately (including existing conversations), and GPT-5.1 models follow your custom instructions and style preferences more reliably.
