India, Nov. 13 -- OpenAI announced a critical update to its foundational models with the release of GPT-5.1 Instant and GPT-5.1 Thinking. The update focuses on enhancing both raw intelligence and conversational style, a move aimed at broad user adoption, from casual chat to high-stakes enterprise applications. The release provides significant new control over how ChatGPT sounds and acts, giving users customisation options beyond simple custom instructions.

The most widely used model, GPT-5.1 Instant, receives two primary upgrades. First, it adopts a default tone described as "warmer" and more conversational. Second, and more crucial for technical use, it now uses adaptive reasoning. This means the Instant model can decide when to engage ...