Developers budgeting for Claude Opus 4.7 should account for up to ~40% higher costs on text workloads due to tokenizer inflation, and should test their specific content types — PDFs, images, and raw text behave very differently — using the updated token counter tool before migrating from Opus 4.6.
Researchers and practitioners tracking Claude's behavior over time can use this git-based structure to precisely diff system prompt changes between model versions without manual parsing.