Untitled is a free, local model router for ChatGPT and Codex on macOS. Pick Untitled Auto once; it routes each request to the lightest model that can handle it—routine edits stay efficient while harder debugging, tooling, and planning step up automatically. Production data shows 55% average savings, giving you 2.2× more Codex from the same plan. One-line install, visible savings, and switch back anytime.