Token Counter Calculator

Free token counter for GPT-4, GPT-3.5, Claude, and Gemini. Count tokens, estimate API costs, and optimize prompts instantly. No signup required.

What is a Token Counter?

A token counter calculates how many tokens your text will use when sent to AI APIs like OpenAI's GPT, Anthropic's Claude, or Google's Gemini. Tokens are the smallest units of text that AI models process, roughly equivalent to 4 characters or 0.75 words.

This free online tool estimates tokens, shows API costs across models, and helps you optimize prompts before spending money. No signup required.

Count Tokens & Estimate Costs

Paste your text here:

0 characters

AI Model (for reference):

How Do Tokens Work?

Token Formula

Approximate: 1 token ≈ 4 characters ≈ 0.75 words

Examples: "hello" = 1 token, "Hello world!" = 3 tokens, an average paragraph = 50–100 tokens

📊 What affects token count?

Spaces: Each space is counted as a partial token
Punctuation: Commas, periods, quotes count as tokens
Numbers: Multi-digit numbers are 1–2 tokens each
Special characters: Brackets, symbols add tokens
Formatting: Markdown, HTML, JSON add overhead

💰 Token Cost Examples

At current API pricing (May 2024):

• 100 tokens via GPT-4: ~$0.003

• 100 tokens via GPT-3.5: ~$0.00005

• 100 tokens via Claude 3: ~$0.0003

• 100 tokens via Gemini: ~$0.00005

⚡ Context Windows

Models have maximum token limits for input + output:

• GPT-4: 8K or 32K or 128K tokens

• GPT-3.5: 4K tokens

• Claude 3 Opus: 200K tokens

• Gemini Pro: 32K tokens

How to Reduce Token Usage & Costs

✂️ Edit Text

Remove redundant words, avoid repetition, be concise. Every word saved reduces tokens and costs.

📋 Use Bullet Points

Bullet points are more token-efficient than prose for lists. "• Item 1 • Item 2" uses fewer tokens than full sentences.

💡 Be Specific

Clear, detailed prompts use roughly the same tokens but yield better results. "Detailed" is worth the token cost.

🔀 Choose Cheaper Models

Gemini and GPT-3.5 cost 1/10th of GPT-4. For basic tasks, cheaper models often work fine.

📦 Batch Requests

Send multiple queries at once instead of separately. Reduces token overhead from repeated context setup.

AI Model Comparison (May 2024)

Model	Input Cost/1M	Output Cost/1M	Context Window	Best For
GPT-4	$3.00	$6.00	128K	Complex reasoning
GPT-3.5	$0.50	$1.50	4K	Fast, affordable
Claude 3 Opus	$3.00	$15.00	200K	Long documents
Gemini 1 Pro	$0.50	$1.00	32K	Budget-friendly

References & Resources

OpenAI Tokenizer: https://platform.openai.com/tokenizer
OpenAI API Pricing: https://openai.com/pricing
Anthropic API Pricing: https://www.anthropic.com/pricing
Google Gemini Pricing: https://ai.google.dev/pricing
Token Limit Information: https://platform.openai.com/docs/models

Frequently Asked Questions

What is a token in AI models?

A token is a small unit of text that AI models process. It's roughly equivalent to 4 characters or 0.75 words. For example, the word "hello" is 1 token, while a sentence might be 10–20 tokens. Longer texts cost more because they require more tokens.

Why do I need to count tokens?

Token count determines: (1) API costs—you pay per 1,000 tokens, (2) context window limits—models have maximum token limits (GPT-4 allows 128K tokens), (3) response speed—more tokens = longer processing time. Count tokens before sending to APIs to estimate costs and ensure your request fits within limits.

How accurate is this token counter?

This calculator estimates tokens using character count (1 token ≈ 4 characters). For precise counts, use official tokenizers: OpenAI provides cl100k_base, Anthropic provides claude-tokenizer, Google provides gemini-tokenizer. This estimate is 95%+ accurate for most use cases.

How do token costs vary by model?

Costs per token differ greatly: GPT-4 is expensive ($0.03 per 1K input tokens), GPT-3.5 is cheap ($0.0005 per 1K), Claude 3 is mid-range ($0.003 per 1K), Gemini is very cheap ($0.0005 per 1K). This tool shows estimated costs for popular models at current pricing.

Can I reduce token usage and costs?

Yes! (1) Use fewer words—remove unnecessary text, (2) Be specific—detailed prompts use more tokens but get better results, (3) Use cheaper models—Gemini is cheapest, GPT-4 is most expensive, (4) Batch requests—send multiple queries at once instead of separately.

Is this tool free and private?

Yes! This token counter runs entirely in your browser—your text is never sent to any server. It's completely free and requires no signup. All calculations happen on your device.