Microsoft's TokenEconomizer cuts Claude Code context by 31%

Microsoft Research and UC Berkeley released TokenEconomizer, an open-source plugin for Claude Code, Codex and Copilot CLI. In testing it cut Claude Code context per request by 31% and session cost by 15% with no lost tasks; the authors report 18.4–30.9% savings on SWE-Bench.

• Context per request fell from 25,966 to 17,795 tokens (−31%)
• Session cost dropped from $0.72 to $0.61 (−15%)
• Paper reports 18.4–30.9% savings on SWE-Bench across 277 tasks
• Plugin is free, Apache 2.0, makes no model calls of its own