AI Context Window Calculator
Calculate if your prompt and response tokens fit inside AI model context limits.
Context Window Calculator
This context window calculator helps developers check whether their prompt and response tokens fit within an AI model's context window. Modern AI systems such as GPT, Claude and Gemini have token limits that define how much text they can process in one request.
What is an AI Context Window?
An AI context window is the maximum number of tokens an AI model can process at once. The context window includes both the input prompt and the generated response.
GPT Context Window Size
The GPT context window size defines how many tokens GPT models can handle. Newer models like GPT-4o support up to 128,000 tokens.
Claude Context Window
The Claude context window allows up to 200,000 tokens, making it useful for processing long documents and conversations.
AI Model Context Window Sizes
| Model | Context Window |
|---|---|
| GPT-4o | 128,000 tokens |
| Claude 3 Sonnet | 200,000 tokens |
| Claude 3 Haiku | 200,000 tokens |
| Gemini 1.5 Pro | 1,000,000 tokens |
AI Context Window and Token Limits
Modern language models operate within a defined AI context window. This limit determines how many tokens a model can process in a single request. Developers often use a context window calculator to verify that their prompts and expected responses stay within the allowed token limits.
For example, when working with OpenAI models, understanding the GPT context window size is essential. GPT models such as GPT-4o support context windows up to 128k tokens. If your prompt and response exceed this limit, the API request may fail.
GPT Token Limit Calculator
A GPT token limit calculator helps developers estimate whether their prompts fit inside the model's token limit. This is especially useful when building large AI workflows, processing documents or generating long responses.
Claude Context Window
The Claude context window is larger than many other models. Claude 3 Sonnet and Haiku support up to 200k tokens, making them ideal for processing long conversations and large text datasets.
AI Context Window Size Calculator
This AI context window size calculator allows you to check your prompt token count and expected response tokens instantly. It works as an AI token limit checker and helps developers avoid exceeding token limits when using GPT, Claude or Gemini models.
LLM Context Window Size Explained
The LLM context window size defines the memory capacity of a large language model. Tools like this prompt token calculator help developers understand token usage and optimize prompts for better results.
Frequently Asked Questions
What is a context window?
A context window is the maximum number of tokens an AI model can process in a single request.
Does the context window include prompt and response?
Yes. Both the prompt and the generated response are counted toward the total token limit.
What happens if I exceed the token limit?
If your total tokens exceed the model context window, the request may fail or be truncated.