solana-builtins-default-costs is used at run time in 28 crates. It is a direct run-time dependency in 3 crates. It's used only as a dev dependency in 14 crates.

Depender (with downloads and own rev deps) solana-builtins-default-costs version
24K 5 solana-cost-model =2.1.1
10K 16 solana-core =2.1.1
9.9K 5 solana-runtime-transaction =2.1.1