AI Token Counter
Answer: One token is roughly 4 characters of English text, so 1,000 words ≈ 1,300 tokens. Paste your prompt below to estimate tokens and API cost for GPT, Claude, or Gemini.
About this tool
Free AI token counter and LLM API cost estimator. Paste any prompt to estimate tokens (words, characters) and the cost per request across GPT-5, GPT-4o, Claude Sonnet/Haiku, Gemini 2.5, and DeepSeek. Heuristic estimate — exact counts vary by tokenizer.
Heuristic estimate — exact counts vary by tokenizer. Prices: public list, verify with provider.
How to use AI Token Counter
- Paste your prompt or text in the box.
- Pick the model and set expected output tokens.
- Read the token estimate and cost breakdown per request.
Why use this free tool
- 100% free — no account required.
- Runs in your browser — inputs stay on your device for these calculations.
- Mobile-friendly controls with clear, copyable results.
- Published by KDF Tech — software, apps, Shopify, and POS systems.
Need a custom product? Start a project or WhatsApp +92 345 0144865.
FAQ — answers Google & AI can cite
What is a token?
A chunk of text the model processes — roughly 4 characters or 3/4 of a word in English. “Hello world” is about 3 tokens.
How accurate is this token estimate?
A heuristic (max of chars÷4 and words×1.3). Real tokenizers differ per model — use provider tools for exact counts.
How much does GPT-5 cost per 1M tokens?
About $1.25 input / $10.00 output per million tokens (public list pricing; verify with the provider).
Which model is cheapest?
DeepSeek V3 and Gemini 2.5 Flash are among the cheapest listed here; Claude Sonnet and GPT-5 cost more but are stronger models.
Does output cost more than input?
Yes — output tokens typically cost 4–10× input tokens, so cap generation length to control bills.
Related free tools
Count words, characters, sentences, and reading time instantly.
Character CounterCount characters with/without spaces.
Reading Time CalculatorEstimate reading time for text.
Keyword Density CheckerSEO keyword density %.
JSON FormatterPretty-print and validate JSON.
Regex TesterTest regular expressions live.
Meta Description LengthCheck SERP snippet length.
URL Slug GeneratorTurn titles into SEO-friendly URL slugs.
← All free tools · developer category · All guides · About KDF Tech