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LLM Token Counter
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Token Counts & Costs
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Understanding Tokenization
What Are Tokens?
Tokens are the fundamental units that LLMs process. A token is roughly 3-4 characters or about 3/4 of a word in English. Common words like "the" or "is" are single tokens, while longer or rarer words may be split into multiple tokens.
Why Token Counts Vary
Each provider uses a different tokenizer. OpenAI uses tiktoken (BPE-based), Anthropic uses their own tokenizer, and Google uses SentencePiece. The same text may produce slightly different token counts across providers, though estimates are typically within 5-10%.
Input vs Output Pricing
LLM APIs charge differently for input (prompt) and output (completion) tokens. Output tokens are typically 2-5x more expensive because generation requires more compute. Understanding this distinction helps you estimate costs accurately for your use case.
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All token counting and cost calculations happen entirely in your browser. Your text is never sent to any server. Pricing data is fetched from our API and updated regularly to reflect current API rates from each provider.
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