AI Token Counter
Estimate token counts and API costs across GPT, Claude, and Gemini models. Paste your prompt and see results instantly.
Paste text above to estimate token counts and API costs across GPT, Claude, and Gemini models.
What are tokens?
Tokens are the basic units AI models use to process text. A token can be a word, part of a word, or punctuation. On average, one English word equals about 1.3 tokens. Token count affects both API costs and context window limits.
Why token count matters
- Cost control: API pricing is per-token. Knowing your token count helps estimate costs before sending requests.
- Context limits: Each model has a maximum context window. Long prompts may need trimming to fit.
- Prompt optimization: Shorter prompts that achieve the same result save money and reduce latency.
Frequently Asked Questions
What is a token in AI?
A token is the smallest unit of text that AI models process. It can be a whole word, a sub-word, or even a single character. On average, one English word equals about 1.3 tokens. Different models use different tokenization methods, which is why token counts vary across GPT, Claude, and Gemini.
How are AI API costs calculated?
AI API providers charge per token processed — both input (your prompt) and output (the response). Prices vary by model: GPT-4o costs around $2.50 per million input tokens, while Claude 3.5 Sonnet costs $3. Use our Cost Calculator to compare plans side by side.
Is this token counter accurate?
This tool provides estimates based on average word-to-token ratios. For exact counts, each provider has its own tokenizer (e.g., OpenAI's tiktoken). Our estimates are typically within 5-10% of actual counts and are useful for quick cost projections.
Does this tool send my text to any server?
No. The token counter runs 100% in your browser. Your text is never sent to any server, API, or third party. Close the tab and your data is gone.
Privacy
Token estimation runs entirely in your browser using word-count ratios. No text is sent to any server or API.