How to use Claude Code FREE Forever (Openrouter)

A walkthrough on how to use Claude Code's agentic framework with alternative models via OpenRouter, reducing or eliminating API costs. The guide covers setting up an OpenRouter API key, comparing five model options (Claude Opus/Sonnet, Gemini Flash, DeepSeek V3, Qwen) across cost, speed, performance, and security trade-offs, and using a tool called anti-gravity to switch models in Claude Code's config. It also demonstrates that Claude skills (like Bitly link generation) remain portable across model swaps, and explains how to revert back to Claude at any time.