AI Token Counter

Count tokens and estimate API costs for GPT, Claude, Llama and Gemini models

AI Token Counter GPT-4o

Select AI Model

Enter or Paste Text

Token counts are approximate using a BPE-style algorithm. Actual counts may vary slightly by model.

Token Statistics

0
Tokens

Characters

Words

Estimated Cost (per 1M tokens)

Input cost $0.000000

Output cost $0.000000

All processing happens in your browser. No text is sent to any server.

Usage Examples

Prompt Cost Check

Paste your system prompt or user message to see how many tokens it uses and what it will cost across different AI models.

Conversation Budget

Estimate the total tokens for a multi-turn conversation to plan your API usage and stay within budget.

Document Analysis

Check if a long document fits within model context windows and calculate the processing cost before sending it.

Features

Real-Time Counting

Token count and cost update instantly as you type, no button click needed

Cost Estimation

Input and output costs calculated for every supported model based on official pricing

Multi-Model Support

GPT-4o, GPT-4o mini, GPT-3.5, Claude 3.5 Sonnet, Claude 3 Haiku, Llama 3.1 70B, Gemini 1.5 Flash

Privacy First

All processing is local in your browser. Your prompts never leave your device

How to Use?

Select a Model

Choose the AI model you plan to use from the dropdown menu. Pricing updates automatically.

Enter Your Text

Type or paste your prompt or document. Token count and cost estimate update in real-time.

Review the Results

Check the token count, character count, word count, and estimated input/output costs in the stats panel.

Frequently Asked Questions

The counter uses a BPE-style approximation that is very close to actual model tokenizers. Results may differ by 1-5% from the exact count returned by official APIs like tiktoken.

AI models charge separately for input tokens (your prompt) and output tokens (the model's response). Output tokens are typically more expensive. This tool shows both so you can budget accurately.

No. All token counting and cost calculation happens entirely in your browser using JavaScript. Your text never leaves your device.

Different model families use different tokenizers (e.g., tiktoken for GPT, Claude's tokenizer). The same text may produce slightly different token counts. This tool provides a good approximation suitable for cost planning.

What is an AI Token Counter?

An AI token counter estimates how many tokens a piece of text will consume when sent to a large language model (LLM). Tokens are the basic units that AI models like GPT-4o and Claude use to process text — roughly 4 characters or 0.75 words per token for English. Knowing your token count before making an API call lets you predict costs, avoid context window limits, and optimize your prompts.

Why Count Tokens Before Using the API?

API costs for AI models are billed per token. A long system prompt or large document can consume thousands of tokens and significantly impact your monthly bill. By counting tokens upfront, developers and businesses can trim unnecessary words, split long documents into chunks, and choose the most cost-effective model for each task. This tool shows you both input and output costs, since output tokens are usually 2-3x more expensive than input tokens.

Security and Privacy

Your data security is our priority

Local Processing

All processing happens in your browser

No Data Transfer

Your data is not sent to our servers

No Data Storage

No data is stored or shared

SSL Encryption

SSL encryption for secure connection

Next Step

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