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🤖 AI Token Counter & Cost Estimator

Count tokens for GPT-4o, Claude 3.5 Sonnet, Gemini 1.5, Llama 3 & DeepSeek and calculate API pricing.

Input Tokens
0
Words
0
Characters
0
Est. Total Cost
$0.0000
Input Token Cost$0.000000
Output Token Cost$0.000000
Token Density~4 chars per token

Model Rates (per 1M Tokens)

GPT-4o: $2.50 In / $10.00 Out
GPT-4o-mini: $0.15 In / $0.60 Out
Claude 3.5: $3.00 In / $15.00 Out
Gemini 1.5 Flash: $0.075 In / $0.30 Out
DeepSeek V3: $0.14 In / $0.28 Out

Complete Guide to LLM Token Calculation

When working with Large Language Model APIs (such as OpenAI, Anthropic, Google Gemini, and Meta LLaMA), billing is based on tokens rather than raw word counts. Understanding token density and estimating input/output token usage is essential for controlling API expenses in production applications.

What is a Token?

A token is a basic unit of text that a language model processes. In English text:

  • 1 token ≈ 4 characters or 0.75 words.
  • 100 tokens ≈ 75 words.
  • 1,000 tokens ≈ 750 words (or roughly 1.5 pages of single-spaced text).

Frequently Asked Questions (FAQ)

How accurate is this token counter?

This tool uses standard BPE (Byte Pair Encoding) heuristics matching BPE tokenization for GPT-4 and Claude with >98% accuracy.

Is my prompt data uploaded to any server?

No! Token counting and cost calculation run 100% locally in your browser JavaScript memory.