🤖 AI Token Counter
Estimate how many tokens your text uses for popular LLMs — instantly, in your browser
Estimated tokens per model
| Model family | Estimated tokens |
|---|---|
| GPT-4o / GPT-4.1 (o200k) | ~0 |
| GPT-4 / GPT-3.5 (cl100k) | ~0 |
| Claude 3.5 / Claude 4 family | ~0 |
| Llama 3 family | ~0 |
Estimate how many tokens a piece of text uses for GPT and Claude-class language models. Paste your text to get an approximate token count, useful for staying within context limits and estimating API costs — calculated locally in your browser.
Frequently asked questions
How accurate is the token count?
It is an estimate based on a heuristic, not the model’s real tokenizer, so expect it to differ from the true count by a few percent — more for code, unusual languages or heavy punctuation. For exact counts, use the official tokenizer or API for your specific model.
What is a token?
Language models split text into tokens — chunks that are usually a word, part of a word, or a punctuation mark. In English, one token averages roughly four characters or three-quarters of a word, but the exact split depends on the model’s tokenizer.
Why do token counts matter?
Models have context limits measured in tokens, and API usage is billed per token. Estimating the count helps you check whether a prompt fits and roughly what a request will cost before sending it.