Built a tool to see where Codex/Claude Code wastes my tokens

A developer created a tool to analyze token usage with Codex/Claude Code, aiming to understand where tokens are being consumed. The developer's personal usage showed 1.25 billion tokens in three weeks, with approximately one in five calls flagged. About 11% of the API-equivalent spend was identified as optimizable, primarily due to model mismatch and oversized output. The developer is interested in what others are building and how they are acquiring their initial users.

This report uniquely details a developer's personal token usage (1.25B in 3 weeks) and identifies specific optimization areas like model mismatch, unlike general discussions of token waste.