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Top 5 · 2026-05-15 · source-backed
RTK (Rust Token Killer) is a single Rust binary that sits between your terminal commands and your AI coding agent. When Claude Code or Cursor calls git status or ls -la, RTK intercepts the output and compresses it before it hits the context window. That's it. One trick. And it saves 60-90% of your tokens.
The numbers are specific. A typical 30-minute Claude Code session burns around 150K tokens. With RTK proxying your commands, that drops to roughly 45K. The overhead is under 10ms per command. You won't notice it's there.
I installed this last week in my personal projects, and the savings are real. Most of the token waste in AI coding sessions isn't your code or your prompts. It's the raw output of dev tools that the model needs to understand your environment. Git diffs, directory listings, test output, compiler errors. All of it gets shoved into context verbatim, and most of it is repetitive structure that compresses well.
RTK supports 12 AI coding tools: Claude Code, Cursor, Codex, Gemini CLI, Windsurf, Aider, and more. It works through transparent auto-rewrite hooks, meaning you don't change your workflow. Install it, configure which tools to proxy, and your token consumption drops.
At 48,258 stars and climbing, RTK is the most practical cost-reduction tool in the agentic coding stack right now. If you're paying per-token or bumping into context limits on complex codebases, this should be the next thing you install. Not next week. Today.
Each link below shares sources, entities, or timing with this story.
RTK supports Gemini CLI / Shared entities / Same source / Shared topic / Earlier coverage
Linked by a graph relationship (RTK supports Gemini CLI); both cover Aider, Claude Code, Codex, Cursor; cite the same source (Source: GitHub).
Linked by a graph relationship (RTK supports Gemini CLI); both cover Claude Code, Cursor, GitHub, RTK; cite the same source (Source: GitHub).
RTK supports Cursor / Shared entities / Same source / Shared topic / Earlier coverage
Linked by a graph relationship (RTK supports Cursor); both cover Aider, Claude Code, Codex, Cursor; cite the same source (Source: GitHub).
Linked by a graph relationship (RTK supports Cursor); both cover Claude Code, Codex, Cursor, GitHub; cite the same source (Source: GitHub).
RTK supports Gemini CLI / Shared entities / Same source domain / Shared topic / Earlier coverage / Tension
Linked by a graph relationship (RTK supports Gemini CLI); both cover Claude Code, Codex, Cursor, Gemini CLI; reported by the same outlet (github.com).
Superpowers uses Gemini CLI / Shared entities / Same source domain / Shared topic / Earlier coverage
Linked by a graph relationship (Superpowers uses Gemini CLI); both cover Claude Code, Cursor, Gemini CLI, GitHub; reported by the same outlet (github.com).
RTK supports Windsurf / Shared entities / Same source domain / Shared topic / What happened next
Linked by a graph relationship (RTK supports Windsurf); both cover Claude Code, Codex, Cursor, GitHub; reported by the same outlet (github.com).
Google deprecates Gemini CLI / Shared entities / Same source domain / Shared topic / Earlier coverage
Linked by a graph relationship (Google deprecates Gemini CLI); both cover Claude Code, Codex, Cursor, Gemini CLI; reported by the same outlet (github.com).