OpenAI released its GPT-5.1 model, which brings updated conversational options. The latest update builds on the GPT-5 release from earlier this year with GPT‑5.1 Instant and GPT‑5.1 Thinking modes. OpenAI claims Instant is “warmer, more intelligent, and better at following your instructions” while Thinking is “easier to understand and faster on simple tasks, more persistent on complex ones”.
OpenAI is also allowing users to fine-tune ChatGPT’s tone style directly from settings. In addition, GPT-5.1 users can also toggle between eight conversational tone presets, including: Default, Professional, Friendly, Candid, Quirky, Efficient, Nerdy, and Cynical.
GPT‑5.1 Instant and Thinking are now available for Pro, Plus, Go, and Business users, while the free tier will get them in the coming days. GPT‑5.1 is set to become the default model for all interactions.
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