gpt-5.1

  • 2025-11-13
  • Chat, Reasoning, Vision
  • By OpenAI
  • Input: ￥10.00 / M tokens Output: ￥80.00/ M tokens
  • Features: Function Calling, Image Input, Image Output, Reasoning, Streaming, Structured Outputs, Text Input, Text Output, Web Search
  • Context Window: 400K
  • Maximum Output: 128K
  • Input: ￥10.00 / M tokens Output: ￥80.00/ M tokens
  • Features: Function Calling, Image Input, Image Output, Reasoning, Streaming, Structured Outputs, Text Input, Text Output, Web Search
  • Context Window: 400K
  • Maximum Output: 128K

Model Description

GPT-5.1 is our flagship model for coding and agentic tasks with configurable reasoning and non-reasoning effort. Learn more in our GPT-5.1 usage guide.

  • 400,000 context window
  • 128,000 max output tokens
  • Sep 30, 2024 knowledge cutoff
  • Reasoning token support

Supported models:

  • gpt-5.1
  • gpt-5.1-2025-11-13
  • basic/gpt-5.1
Click to Buy

🔔How to Use

graph LR A("Purchase Now") --> B["Start Chat on Homepage"] A --> D["Read API Documentation"] B --> C["Register / Login"] C --> E["Enter Key"] D --> F["Enter Endpoint & Key"] E --> G("Start Using") F --> G style A fill:#f9f9f9,stroke:#333,stroke-width:1px style B fill:#f9f9f9,stroke:#333,stroke-width:1px style C fill:#f9f9f9,stroke:#333,stroke-width:1px style D fill:#f9f9f9,stroke:#333,stroke-width:1px style E fill:#f9f9f9,stroke:#333,stroke-width:1px style F fill:#f9f9f9,stroke:#333,stroke-width:1px style G fill:#f9f9f9,stroke:#333,stroke-width:1px

Purchase Now

Start Chat on Homepage

Register / Login

Enter Key

Read API Documentation

Enter Endpoint & Key

Start Using

Description Ends

Recommend Models

o3-pro

  • Chat, Reasoning, Vision
  • OpenAI
The o-series of models are trained with reinforcement learning to think before they answer and perform complex reasoning. The o3-pro model uses more compute to think harder and provide consistently better answers. o3-pro is available in the Responses API only to enable support for multi-turn model interactions before responding to API requests, and other advanced API features in the future. Since o3-pro is designed to tackle tough problems, some requests may take several minutes to finish. To avoid timeouts, try using background mode.
  • 2025-06-10

gemini-2.5-flash-preview-04-17

  • Chat, Reasoning
  • Gemini
Gemini-2.5-Flash-Preview-04-17 is a large language model supporting text, image, video, and audio inputs, with advanced output and code execution capabilities and high token limits.
  • 2025-04-17

o3

  • Chat, Reasoning, Vision
  • OpenAI
Our most powerful reasoning model with leading performance on coding, math, science, and vision
  • 2025-04-16