AI Token Counter
Count tokens and calculate costs across 18+ AI models instantly.
What are tokens?
Tokens are the basic units that AI language models use to process text. A token can be a word, part of a word, or even a single character. On average, 1 token is approximately 4 characters or 0.75 words in English.
How is cost calculated?
AI API providers charge per token processed. Input tokens (your prompt) and output tokens (the model's response) are priced differently. This tool shows the cost if your entire text were sent as input, and what it would cost if the same number of tokens were generated as output.
Accuracy
OpenAI models use the exact tiktoken tokenizer (loaded via WebAssembly). All other models use a character-based estimation (~4 chars per token for English text, ~3.5 for code). Actual token counts may vary by 5-15% for estimated models.