ChatGPT 5.1: Smarter, More Conversational AI Arrives
Launch
OpenAI has unveiled GPT‑5.1, the next evolution of its flagship AI model series, rolling out beginning Nov 12 2025. :contentReference[oaicite:2]{index=2}
Variants
GPT-5.1 comes in two variants: “Instant” for faster, conversational replies; “Thinking” for deeper reasoning and complex tasks. :contentReference[oaicite:3]{index=3}
Conversation
Instant mode is designed to feel warmer and more natural in chat, better at following your instructions and adapting tone. :contentReference[oaicite:4]{index=4}
Reasoning
Thinking mode intelligently allocates more “thinking time” to complex prompts and less for easy ones - improving both speed and depth. :contentReference[oaicite:5]{index=5}
Tone Control
Users now get enhanced tone controls with presets like Friendly, Professional, Quirky - letting ChatGPT mirror your preferred conversational style. :contentReference[oaicite:6]{index=6}
Instruction-Following
GPT-5.1 boasts stronger instruction-following - it’s more reliable when you ask it to follow tight constraints or special formats. :contentReference[oaicite:7]{index=7}
Performance
Under the hood, upgrades include improved accuracy across math, code and reasoning benchmarks compared with GPT-5. :contentReference[oaicite:8]{index=8}
Roll-out
The rollout begins with paid users (Plus, Pro, Business) and then expands to free-tier users over days. Legacy GPT-5 models remain for a limited time. :contentReference[oaicite:9]{index=9}
Use-Cases
Whether drafting emails, generating code, or brainstorming ideas, GPT-5.1’s choice of mode helps it adapt: easy tasks go to Instant, tough ones to Thinking. :contentReference[oaicite:10]{index=10}
Implication
This update signals a shift: AI that not only *knows* more, but *chat feels like a person*. Prepare for smarter, friendlier assistants.