🤖 AI Token Counter

Count tokens for GPT-3.5, GPT-4, and Claude models using the exact tokenizer. Estimate API costs before sending requests. Free online LLM token counter — no signup needed.

Your Text

Tokens

Characters

Words

$0.00

Input price

$0.00

Output price

Context Used

Token count is an approximation (4 chars ≈ 1 token). Pricing per 1M tokens from public APIs.

How to Use

Paste or type your text

Enter any text — a system prompt, document, or message. Token count updates live as you type.

Select your AI model

Choose GPT-4, Claude 3, Llama 3, or Gemini Pro. Pricing and tokenization differ per model.

Read the estimate

See tokens, characters, word count, and estimated API cost for input and output tokens.

Frequently Asked Questions

What is a token in AI models? +

A token is the basic unit of text that AI language models process. Tokens are roughly 4 characters or ¾ of a word in English. "Hello world" is about 2 tokens. Tokenization varies by model — GPT uses BPE (Byte Pair Encoding), while Claude and Llama have their own tokenizers.

How accurate is this token counter? +

This tool uses standard approximation rules: ~4 characters per token for English text. For exact counts, use the official tokenizer. Accuracy is typically within 5% for English content. Non-English text (especially CJK characters) may use more tokens per character.

Why do different models have different token counts? +

Each AI model uses a different tokenizer trained on different data. GPT-4 uses cl100k_base, Claude uses its own SentencePiece-based tokenizer, and Llama uses a different vocabulary. The same text can produce different token counts across models.

How is API cost calculated? +

API providers charge per 1,000 or 1,000,000 tokens. The cost shown is an estimate based on current published pricing. Input and output tokens are often priced differently — output (completion) tokens usually cost 2-3x more than input tokens.

Is my text sent to any AI model or server? +

No. Token counting is done entirely in your browser using JavaScript. Your text is never sent to any AI model, API, or server.

संपूर्ण गाइड: Token Counter

Token Counter क्या है?

Token Counter text में LLM tokens count करता है। AI language models (GPT-4, Claude, Llama) text को tokens में process करते हैं, characters में नहीं। एक token approximately 4 characters या 3/4 word होता है। Token limits और API costs tokens पर based होते हैं।

Claude का context window 200K tokens है; GPT-4 का 128K है। Prompts send करने से पहले token count check करना costs control और context overflow prevent करता है।

कैसे उपयोग करें

Text paste करें input में।
Model select करें: GPT-4, Claude, Llama, etc।
Token count देखें real-time में।
Cost estimate check करें API pricing के आधार पर।

Pro Tips

Code tokens prose से ज्यादा efficient होता है — common programming tokens short हैं।
Whitespace और formatting reduce करें token count minimize करने के लिए।
System prompts भी context window में count होते हैं।