Simon Willison Ships Claude Token Counter with Model Comparisons — 216pts on HN

Simon Willison·medium signal

Simon Willison released an updated Claude Token Counter tool with model comparison features, hitting 216 points and 83 comments on HN. The tool lets developers compare token counts across Claude models, making the cost-per-request transparent when choosing between Opus, Sonnet, and Haiku. For builders optimizing inference costs, this provides the kind of concrete, per-request token accounting that's become essential as agentic workflows balloon context windows and multi-turn conversations accumulate tokens across sessions.