GPT-5.1

OpenAI gpt-5-1

Model Information
Slug gpt-5-1
Release Date November 13, 2025
Aliases gpt-5.1-2025-11-13 gpt-5-1 gpt-5-1-2025-11-13 gpt-5.1
Organization
Name OpenAI
Description

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 Context: 400000

Available at 9 Providers
Provider Input Price ($/1M) Output Price ($/1M) Free
GitHub Copilot $0.00 $0.00
OpenCode Zen $1.07 $8.50
Poe $1.10 $9.00
Abacus $1.25 $10.00
Helicone $1.25 $10.00
Cloudflare AI Gateway $1.25 $10.00
ZenMux $1.25 $10.00
OpenRouter $1.25 $10.00
Factory.ai - -