Hey guys, yes another token article but this one is different.

I work at MongoDB, and my primary db is Mongo, but I use raw SQL for some things, so I run both in the same app.

I was building a token optimizer for my own sessions. I noticed more token usage on the SQL interactions and I didnt understand why. I wasnt doing anything special with the SQL data so I was curious what was happening.

So I wrote a hook that logs the token count of every database statement Claude generates, instead of counting turns. The first thing it showed was that the same object cost way more tokens on SQL (about 18x). That surprised me, because you don't think about database statements. Every database has them, every app has them, they're just there. It never occurred to me they were a token cost at all. They're not the biggest thing in a session, but they add up, especially since Claude loves writing multiple files with database calls just to check the data.…