What is ChatGPT Context Size Tool?

The ChatGPT Context Size Tool helps you track how much of a model’s context window is being used. GPT models have a maximum context size (in tokens), which includes both your prompt (input) and the AI’s completion (output). This tool calculates total usage, remaining tokens, and percentage of the context used, helping you avoid exceeding limits and manage long conversations efficiently.

How to Use:

1. Enter Prompt Tokens: Type the number of tokens in your input prompt.
2. Enter Completion Tokens: Type the number of tokens you expect or received from the AI’s output.
3. Enter Model Max Context: Input the model’s total context window in tokens (e.g., 8192 for 8k, 128000 for 128k).
4. Click “Calculate”: The tool calculates the total tokens used, the percentage of the context window consumed, and remaining tokens.
5. Review Results: If usage exceeds the model’s context, the tool will indicate by how many tokens and suggest reducing prompt or output size.