Simon Willison Adds Model Comparison to Claude Token Counter Tool

Summary

Simon Willison has upgraded his open-source Claude Token Counter tool to support running token counts against different Anthropic Claude models for comparison purposes. The tool, hosted at tools.simonwillison.net, now allows developers to see how tokenization differs across Claude model variants, which can affect cost estimation and context window planning. The update was submitted as a pull request (#269) to Willison's tools repository on GitHub. While the article content is partially truncate