Simon Willison’s Weblog

14th March 2025

Tool Token Usage Calculator — Calculate token usage across your Claude and other LLM API calls by pasting YAML output from the LLM tool's `llm logs -su` command. The calculator automatically groups token consumption by model and displays total input and output tokens for each. This helps you track and analyze API usage patterns across multiple conversations and model versions.

Posted 14th March 2025 at 12:20 am

Recent articles

One-shotting a Raccoon Heist game using Claude Fable 5 - 5th August 2026
New release of LLM adds support for reasoning traces, OpenAI Responses, server-side tools, and smarter logging - 4th August 2026
Stateless MCP has recaptured my interest (and inspired mcp-explorer and datasette-mcp) - 31st July 2026

This is a beat by Simon Willison, posted on 14th March 2025.

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