OpenAI has formally unveiled GPT-5.1, the newest evolution of its flagship AI mannequin, that includes two superior variants—GPT-5.1 On the spot and GPT-5.1 Pondering. This main replace focuses on delivering extra pure, partaking conversations whereas dramatically bettering reasoning and process efficiency. The discharge comes simply three months after the debut of GPT-5, which drew criticism from customers for feeling “chilly” and inconsistent in comparison with earlier variations.
GPT-5.1 On the spot now powers most ChatGPT conversations, providing quicker, extra lifelike dialogue, whereas GPT-5.1 Pondering handles deeper and extra complicated reasoning duties. Each fashions can dynamically assess query problem, spending additional processing time on difficult issues and giving faster responses to easier ones—making conversations smoother and extra environment friendly.
GPT-5.1 Introduces Eight Personalities and Customizable Tone Controls
One in every of GPT-5.1’s most fun updates is its new character presets. Customers can now select from eight distinct modes—Default, Skilled, Pleasant, Candid, Quirky, Environment friendly, Nerdy, and Cynical—to form the AI’s tone and conversational type. Further customization instruments let customers alter heat, brevity, and even emoji utilization in actual time, guaranteeing a extra private chat expertise. The characteristic applies immediately throughout all chats, each present and new.
Paid customers underneath Professional, Plus, Go, and Enterprise plans would be the first to entry GPT-5.1, whereas free-tier customers will obtain the replace quickly after. Enterprise and Schooling plan subscribers will take pleasure in a one-week preview window earlier than GPT-5.1 turns into the default mannequin.
Stronger Efficiency, Clearer Explanations, and Broader Rollout
OpenAI notes that GPT-5.1 delivers main enhancements in mathematical reasoning and coding, outperforming GPT-5 in benchmarks like AIME 2025 and Codeforces. The Pondering variant additionally simplifies complicated matters, eradicating pointless jargon and explaining intricate concepts in clear, accessible language.
The replace displays OpenAI’s effort to make AI really feel “not solely good but additionally fulfilling to speak to,” in response to Fidji Simo, CEO of Functions at OpenAI. GPT-5.1 goals to stability mental depth with emotional heat—a mix that many customers felt was lacking in GPT-5.
Each GPT-5.1 On the spot and GPT-5.1 Pondering will likely be out there by way of the API later this week, with a gradual rollout deliberate to make sure platform stability. Legacy GPT-5 fashions will stay out there for the subsequent three months in a dropdown menu for paying customers, giving everybody time to regulate to OpenAI’s smarter, friendlier new AI companion.