Paste any prompt to estimate token count and cost per call across AI models.
AI models process text as tokens — chunks of about 4 characters or three-quarters of a word in English. The exact tokenization varies by model, but a rough estimate of 1 token per 4 characters is reliable for planning purposes. This tool uses that approximation.
For exact token counts, use the official tokenizer tools from OpenAI or Anthropic. For cost planning and budgeting, this estimator gives you a solid ballpark.