GPT-5.1
by OpenAI
GPT-5.1 is the latest frontier-grade model in the GPT-5 series, offering stronger general-purpose reasoning, improved instruction adherence, and a more natural conversational style compared to GPT-5. It uses adaptive reasoning to allocate computation dynamically, responding quickly to simple queries while spending more depth on complex tasks. The model produces clearer, more grounded explanations with reduced jargon, making it easier to follow even on technical or multi-step problems. Built for broad task coverage, GPT-5.1 delivers consistent gains across math, coding, and structured analysis workloads, with more coherent long-form answers and improved tool-use reliability. It also features refined conversational alignment, enabling warmer, more intuitive responses without compromising precision. GPT-5.1 serves as the primary full-capability successor to GPT-5
Specifications
Technical details and pricing.
Benchmarks
10 benchmark scores from Artificial Analysis.
Composite Indices
Intelligence, Coding, Math
Standard Benchmarks
Academic and industry benchmarks
Frequently Asked Questions
What is GPT-5.1 good for?
Use GPT-5.1 for everyday tasks like writing, summarizing, brainstorming, and getting clear explanations.
How much does GPT-5.1 cost?
Pricing is based on usage. Current rates are $1.25/1M tokens for input and $10.00/1M tokens for output.
Can I try GPT-5.1 for free?
Yes. You can start a chat instantly and test the model before deciding on a plan.
Does GPT-5.1 support images or audio?
GPT-5.1 can understand images.
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Benchmarks and pricing are sourced from Artificial Analysis where available. OpenRouter specs are used as a fallback.