
OpenAI Rolls Out GPT‑5.1 with New Tone‑Control Presets and Dual‑Model Architecture
OpenAI has launched GPT‑5.1, a two‑model system that pairs an Instant model for everyday requests with a Thinking model for more complex tasks. The update adds six new tone‑presets—Default, Friendly, Efficient, Professional, Candid and Quirky—plus the existing Cynical and Nerdy options, letting users tailor ChatGPT’s personality. OpenAI says the new models are “warmer, more intelligent, and better at following your instructions.” The rollout will start with paid users before extending to free accounts, while legacy models remain available for a limited period.









