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Large Language ModelsSimon Willison's WeblogPublished: Apr 20, 2026, 10:00 JST1 min read

Simon Willison's Claude Token Counter tool now enables side-by-side comparison of token usage across different AI models

Simon Willison's Claude Token Counter tool now enables side-by-side comparison of token usage across different AI models

3 Key Points

  1. Token Counter tool has been upgraded with model comparison functionality

  2. Allows users to see how the same text is tokenized differently across various AI models

  3. Helps developers optimize costs by understanding token consumption patterns for Claude and competing models

  4. Available on Simon Willison's website as a free utility for the AI development community

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