How to Slash Token Costs on Claude Code, Codex, and OpenCode by Up to 90%
This guide explains why input tokens dominate cost, then details concrete techniques—file filtering, context compression, documentation‑driven prompts, memory management, plan mode, output trimming, and model switching—for Claude Code, GitHub Copilot (Codex) and OpenCode, culminating in a 10‑step checklist that can cut token usage by up to 90 %.
