Free tool
Token Counter
Count real tokens for your text, per Claude model — different models tokenize differently.
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Real per-model API counts, not a single shared estimate.
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Shows cost if that count were used as input or output, per model.
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Falls back to a clearly-labeled approximate count if the API is briefly unavailable.
Frequently asked questions
Each model family uses its own tokenizer, so the same text can split into a different number of tokens depending on the model — Claude Sonnet 5 and Claude Haiku 4.5 will often report different counts for identical input.
Pricing comes from Costiva's admin-editable price list. Always confirm against Anthropic's official pricing page before making a purchasing decision.
This tool falls back to an approximate character-based estimate, clearly labeled as approximate, so you always get a number even during a brief outage.