Unlock the Future of Conversation: GPT-5.1 Awaits
Just released—smarter, warmer AI that adapts to you. GPT-5.1 introduces Instant and Thinking modes with adaptive reasoning, enhanced conversational tone, and 8 personality presets. From instant travel hacks to deep code dives, experience OpenAI's latest magic on your terms.
Enter your task and let GPT-5.1 adapt to it instantly
Instant Mode
Quick hits like itinerary tweaks, code snippets, or email drafts. Optimized for immediate answers.
Thinking Mode
Deep reasoning for multi-step plans, debugging sessions, research syntheses, and long-form outputs.
Why GPT-5.1 Changes Everything
Three core capabilities that make GPT-5.1 the smartest, warmest AI companion
Instant Brilliance
GPT-5.1 Instant mode delivers warmer chats, laser-sharp instructions, and adaptive smarts that think before they speak. Perfect for your daily grind—GPT-5.1 Instant is faster than ever, without the fluff. Whether you need quick travel planning, stress relief routines, or instant answers, GPT-5.1 adapts its reasoning depth automatically for optimal speed and accuracy.
Thinking Depth
GPT-5.1 Thinking mode tackles tough puzzles with dynamic reasoning: 2x speed on simple tasks, relentless focus on complex ones. Say goodbye to vague answers—hello, crystal-clear insights. GPT-5.1 Thinking excels in benchmarks like AIME 2025 math and Codeforces coding, automatically detecting query complexity and scaling processing time accordingly.
Your AI, Your Style
Pick from 8 GPT-5.1 personality presets (Quirky? Cynical? Professional?) or tweak on the fly. Make GPT-5.1 yours—empathetic for heart-to-hearts, efficient for work wins. GPT-5.1's customization presets let you match the AI to your vibe, with fine-tuned traits like conciseness, warmth, scannability, and emoji use in real-time.
Why GPT-5.1 Feels Smarter Than Ever
Four pillars powering GPT-5.1's adaptive, human-like intelligence
Adaptive Reasoning Engine
GPT-5.1 continuously detects query complexity and adjusts its reasoning depth on the fly. For quick asks, GPT-5.1 Instant delivers lightning-fast responses; for tougher puzzles, GPT-5.1 Thinking leans in deeper without missing nuance. This adaptive cadence keeps GPT-5.1 accurate, efficient, and context-aware across every interaction.
Enhanced Conversational Tone
GPT-5.1 speaks like a savvy friend—warmer, more playful, and naturally empathetic. By cutting jargon and reading emotional cues, GPT-5.1 keeps chats engaging whether you need encouragement, brainstorming, or honest feedback. It transforms AI talk tracks into relatable, human-level conversations.
Superior Instruction Following
Give GPT-5.1 a multi-step brief and it stays on task. GPT-5.1 aligns tightly with your prompts, minimizing tangents while surfacing relevant details. Teams lean on GPT-5.1 for precise content creation, structured workflows, and code updates that arrive clean and compliant with requirements.
Customization Presets
Choose from 8 GPT-5.1 personalities—Default, Friendly, Efficient, Professional, Candid, Quirky, Nerdy, Cynical—or fine-tune traits like conciseness and emoji use in real time. GPT-5.1 adapts instantly to your tone, making every conversation feel tailored to your brand, mood, or mission.
Power Your World with GPT-5.1
Four signature workflows that show GPT-5.1 in action
Daily Productivity & Support
Let the model handle the day-to-day. Ask for a budget-friendly Japan itinerary and Instant mode returns playful, precise recommendations in seconds. Vent about a stressful deadline and Thinking reframes it with empathetic routines—think guided breathing, gentle checklists, and encouragement that actually lands.
Creative & Technical Work
Ship faster with the Nerdy persona walking your repo, spotting bugs, and explaining fixes with witty clarity. Need launch copy? Candid drafts campaigns that feel honest yet on brand. From code scaffolding to script polishing, momentum stays high.
Emotional & Social Guidance
Real talk, minus the judgment. Share an embarrassing moment and Friendly calmly introduces concepts like the spotlight effect, so you bounce back quicker. It adapts tone in real time, delivering warmth, encouragement, and context that genuinely helps.
Enterprise & Developer Applications
Deploy Efficient as a lightning-fast support agent, or spin up Candid for R&D brainstorms that aren’t afraid to challenge assumptions. With API access to Instant and Thinking, teams orchestrate customer journeys, generate research insights, and prototype products with adaptive intelligence at every step.
How GPT-5.1 Works
Set up a GPT-5.1 conversation in four simple steps
Pick Your Mode
Choose GPT-5.1 Instant when you need rapid-fire answers, or GPT-5.1 Thinking when depth and persistence matter.
Choose a Personality
Select one of the 8 GPT-5.1 presets—or customize warmth, conciseness, and emoji use—to match the tone you want.
Describe Your Task
Share goals, constraints, or sample context. GPT-5.1 reads the room, gauges complexity, and plans its approach automatically.
Review & Iterate
Receive GPT-5.1’s response, adjust mode or persona on the fly, and loop until it feels just right—Instant for speed, Thinking for depth.
Choose GPT-5.1: AI That Thinks Like You Do
GPT-5.1 positions itself as 'AI that thinks like you do'—faster, smarter, and more attuned to human nuances. GPT-5.1 isn't revolutionary like GPT-4's jump, but it refines the conversational companion angle with adaptive reasoning, warmer interactions, and 8 personality presets. Whether you're planning a trip, debugging code, or seeking emotional support, GPT-5.1 adapts to your needs in real-time. Experience the future of natural AI conversation with GPT-5.1.
“Faster on simples. Deeper on complexes. Warmer always. GPT-5.1 adapts to you.”
Frequently Asked Questions About GPT-5.1
Everything you need to know about GPT-5.1
What is GPT-5.1?
GPT-5.1 is OpenAI's latest AI model, launched on November 12, 2025, as an iterative upgrade to GPT-5. The release focuses on natural, efficient, and personalized interactions with two core variants—Instant for speed and Thinking for complex tasks—plus 8 built-in personality presets for adaptive intelligence.
What's the difference between GPT-5.1 Instant and GPT-5.1 Thinking?
In GPT-5.1, Instant mode is optimized for quick, everyday use—perfect for travel planning, instant answers, or casual chats. Thinking mode is built for complex work like math problems, code debugging, or deep analysis, scaling processing time so it stays fast on simple prompts and thoughtful on harder ones.
What are the 8 personality presets in GPT-5.1?
GPT-5.1 offers eight built-in personality presets: Default, Friendly, Efficient, Professional, Candid, Quirky, Nerdy, and Cynical. Each preset fine-tunes traits such as conciseness, warmth, scannability, and emoji use, and you can switch personas in real time or customize them further.
How does GPT-5.1's adaptive reasoning work?
GPT-5.1 automatically detects query complexity and adjusts processing depth. Simple questions get quick replies, while tougher puzzles trigger deeper reasoning—one reason it scores highly on AIME 2025 math and Codeforces coding benchmarks.
When was GPT-5.1 released?
OpenAI released GPT-5.1 on November 12, 2025. Paid users receive first access, with free tiers following soon; legacy GPT-5 remains available for three months, and the API exposes the Instant variant via the gpt-5.1-chat-latest endpoint.
How does GPT-5.1 compare to GPT-5?
Compared with GPT-5, GPT-5.1 introduces a dual-mode architecture, eight personality presets, warmer conversations, and tighter instruction following. It's not the leap GPT-4 represented, but it sharpens the conversational companion experience with smarter defaults and more adaptive behavior.
Can I customize GPT-5.1's personality?
Yes. Beyond the eight presets, you can fine-tune GPT-5.1's traits like conciseness, warmth, scannability, and emoji use in real time. The system even suggests tweaks during chats so you can keep the tone empathetic, efficient, or quirky depending on the moment.
What makes GPT-5.1's conversational tone warmer?
OpenAI refined GPT-5.1's conversational stack so responses feel playful and empathetic by default. It trims jargon, reads emotional cues, and adapts register quickly, making everything from casual catch-ups to serious conversations feel more like talking to a savvy friend.
Is GPT-5.1 available for free users?
Rollout happens in stages: Pro and Plus subscribers gain access first, followed by free tiers. Developers can already tap the Instant variant through the gpt-5.1-chat-latest API, while the older GPT-5 endpoint stays live during the transition.
How do I get started with GPT-5.1?
Sign in to your OpenAI account, pick Instant or Thinking, select a personality preset, and start chatting. You can adjust mode or tone at any point, and developers can connect directly to the gpt-5.1-chat-latest endpoint for programmatic access.
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