GPT-5.1
GPT-5.1 is OpenAI’s advanced reasoning flagship featuring adaptive thinking, native multimodality, and state-of-the-art performance in math and technical...
openaiGPT-52025-11-13Try GPT-5.1 Free
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About GPT-5.1
Learn about GPT-5.1's capabilities, features, and how it can help you achieve better results.
A New Frontier in Reasoning
GPT-5.1 represents a significant evolution in OpenAI's frontier models, marking the first release where every model in the ecosystem features native reasoning capabilities. This update focuses on moving beyond the clinical feel of previous iterations to provide a warmer, more intuitive user experience through System 2 thinking. By integrating adaptive reasoning, GPT-5.1 can dynamically decide how much processing time is needed for a specific prompt, allowing it to solve complex PhD-level science and math problems that require multi-step logical deductions.
Multimodality and Personalization
The model is built on an omni multimodal architecture, supporting text and vision with significantly improved memory systems and enhanced instruction-following. It introduces sophisticated style and trait features that allow users to steer the model's personality ranging from professional and academic to more casual and expressive tones. These updates ensure that the model retains personal context and adheres strictly to complex user requirements over long-horizon tasks, particularly in agentic software engineering.
Use Cases for GPT-5.1
Discover the different ways you can use GPT-5.1 to achieve great results.
Software Refactoring
Planning top-down redesigns of legacy applications with over 100,000 lines of code via GPT-5.1 Codex.
Math Olympiad Solving
Providing proofs for obscure Olympiad problems with integer and symbolic reasoning at a 94% success rate.
Technical Specification Mapping
Identifying and explaining complex column structures for niche database tables from visual or text inputs.
Advanced Logical Inference
Developing internally consistent narratives for complex world-building and alternate history fiction.
AI Integration Proposals
Generating professional, data-backed presentations for integrating agentic systems into production environments.
Strategic Architectural Review
Analyzing multi-step project structures to create phase-based implementation plans and risk assessments.
Strengths
Limitations
API Quick Start
openai/gpt-5.1
import OpenAI from "openai";
const openai = new OpenAI();
async function main() {
const completion = await openai.chat.completions.create({
model: "gpt-5.1",
messages: [
{ role: "system", content: "You are a reasoning assistant." },
{ role: "user", content: "Analyze this complex physics problem." }
],
reasoning_effort: "high"
});
console.log(completion.choices[0].message);
}
main();Install the SDK and start making API calls in minutes.
What People Are Saying About GPT-5.1
See what the community thinks about GPT-5.1
"GPT-5.1 Thinking now more effectively adjusts its thinking time based on the question"
"GPT-5 Pro is absolutely SOTA in this area [math]"
"I've got you, Ron — that's totally normal, especially with everything you've got going on lately"
"GPT-5.1 Codex Max fixed it instantly. OpenAI still runs the coding game"
"The reasoning depth is frighteningly good for system architecture"
"It actually feels like it knows me now with the memory update"
Videos About GPT-5.1
Watch tutorials, reviews, and discussions about GPT-5.1
“Compared to GPT5, it will think for almost twice as long for what it thinks are the top 10% hardest questions”
“GPT 5.1 auto... the miniature model that decides whether your query is worth spending time over”
“This dynamic compute scaling is exactly what we needed for serious research”
“The output length is insane, you can actually build whole apps in one go”
“OpenAI is definitely leaning into the reasoning-first strategy here”
“For the first time ever, all of the models in chat are reasoning models”
“This model's expressive range is much more wide”
“We wanted to give the model a sense of personality that isn't just clinical”
“Users can now influence traits like optimism or skepticism through system settings”
“The reasoning effort is something the user can now control directly”
“GPT 5.1 codecs for the coders among you will be a fairly strict improvement”
“Claude frequently overstated its findings and occasionally fabricated data... GPT-5.1 is more honest”
“The AIME 2025 scores are a massive jump over standard GPT-5”
“It's slower, yes, but the quality of the 'Thinking' trace is superior”
“The context window management seems much tighter than the competition”
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Pro Tips
Expert tips to help you get the most out of this model and achieve better results.
Set Reasoning Effort
Manually set the reasoning_effort parameter to high for complex logic or none for instant conversational tasks.
Leverage Persona Styles
Use the new style and trait settings to toggle between Professional, Candid, and Quirky tones.
Manage Active Memory
Regularly review and manage saved memories to ground the model's warm responses in correct personal context.
Verify Citations
Since the model cites sources, cross-reference its technical output against cited documentation for high-stakes tasks.
Testimonials
What Our Users Say
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CEO, qannas.pro
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Ben Bressington
CTO, AiChatSolutions
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Sarah Chen
Head of Growth, ScaleUp Labs
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David Park
Founder, DataDriven.io
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Frequently Asked Questions
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