Question 1

How do I count tokens online?

Accepted Answer

Paste your text into the token counter above, select your AI model, and see the token count instantly. For OpenAI models (GPT-4o, o3, o4-mini) we use tiktoken for exact counts. For Claude, Gemini, and other models, we estimate based on character analysis.

Question 2

What is a token in LLM?

Accepted Answer

A token is the basic unit that AI models use to process text. Roughly, 1 token equals 4 characters in English or about 0.75 words. AI providers like OpenAI, Anthropic, and Google charge based on the number of tokens processed in API calls.

Question 3

How accurate is this token counter?

Accepted Answer

For OpenAI models (GPT-4o, GPT-4o Mini, o3, o4-mini), we use tiktoken for exact byte-level tokenization. For Anthropic Claude and Google Gemini, we provide estimates based on approximately 4 characters per token for English text and 1.5 characters for Chinese text.

Question 4

Can I count tokens for Claude?

Accepted Answer

Yes. Select Claude Sonnet 4 or Claude Haiku 4 from the model dropdown. Since Anthropic does not publish their tokenizer, we estimate token counts based on character analysis. The estimate is typically within 5-10% of the actual count.

Question 5

How do I count tokens in Python?

Accepted Answer

For OpenAI models, install tiktoken: `pip install tiktoken` then use `tiktoken.encoding_for_model("gpt-4o").encode(text)`. For other models, use the token counting APIs provided by each provider. This website gives you instant counts without writing any code.

Token Counter Online