AIトークンカウンター

テキストを正確にトークン化し、各AIモデル（GPT-4、Claude、Gemini等）のトークン数とコストを計算。

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Estimation Method

Token counts are estimates. Actual tokenization varies by model. We use character-based approximation calibrated per model family.

Disclaimer: These are approximations. For exact counts, use the official tokenizer for your model.