How to Count Tokens for LLM API Cost Estimation
Step-by-step guide to counting tokens in your prompts for GPT-4, Claude, Llama, and Gemini using the DevHexLab Token Counter.
Tool Used
Token Counter
Open the Token Counter
Navigate to /tools/developer/token-counter.
Paste or type your text
Enter the prompt or document you want to measure. This can be a system prompt, a user message, a document you plan to include in context, or a combination of all of them.
Select the model
Choose the target model from the selector — GPT-4, Claude, Llama, Gemini, or others. Each model uses a different tokenizer, so counts will differ between models for the same text.
Read the token count and cost estimate
The tool shows the total token count and an estimated cost based on the model's published input pricing. Use this to verify your prompt fits within the model's context window and to project API costs.
All done!
You are ready to use Token Counter like a pro.