AI Token Counter | GPT-5, Claude & LLM Token Estimator

Estimate token count for GPT-5, Claude 3, Gemini, and Llama models. Paste any text to see token usage and estimated API cost instantly. Designed specifically for developers and professionals, this free online ai-tool runs entirely in your browser to process tasks quickly and securely. Enjoy unlimited usage with no data tracking and no registration required.

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Model:

Text Input

Token Estimate — GPT-5.5

—

estimated tokens

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Characters

—

Words

—

Lines

Context window usage— of 1,000,000 tokens

API Cost Estimate

Input cost

—

$5/1M tokens

Output cost (if same length)

—

$30/1M tokens

Estimates use word/char heuristics (±10%). For exact counts use official tokenizers. Prices are indicative and may change.

About AI Token Counter

Estimate token usage for GPT-4o, Claude 3.5, Gemini, Llama, and other LLMs. See context window fill percentage and approximate API cost before sending requests.

Key Features

Supports 10 major models: GPT-4o, Claude 3.5 Sonnet, Gemini 1.5 Pro, Llama 3, and more
Real-time token estimation as you type
Context window usage bar — see how close you are to the limit
Input and output API cost estimates with per-model pricing
Download a text report for your records
Word, character, and line counts alongside token estimates

Use Cases

Check if a prompt fits within a model's context window
Estimate cost before running large batch API jobs
Compare token efficiency across different models
Optimise system prompts to reduce token spend
Debug unexpected API cost increases

Related Keywords

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Privacy & Security

All processing happens locally in your browser. Your data never leaves your computer, ensuring complete privacy and security.

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Frequently asked questions

What is AI Token Counter used for?

Estimate token count for GPT-5, Claude 3, Gemini, and Llama models. Paste any text to see token usage and estimated API cost instantly.

Is AI Token Counter free to use?

Yes. AI Token Counter is completely free with no usage limits, and there is no paid tier required to use it.

Do I need an account to use AI Token Counter?

No. AI Token Counter works immediately in your browser with no signup, login, or email address required.

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