Use Codex for FREE with Tencent HY3 (OpenRouter API) + OmniRoot BackupThe video shows how to use Codex for free by plugging Tencent’s new open-source HY3 model into Codex via a free OpenRouter API (available for about two weeks, until around July 21). The creator demonstrates a custom setup with goal mode and a workspace where you can preview and manage past builds, plus a separate “HY3 Coder” that runs directly on HY3 without Codex. They explain the workflow: Codex acts as the hands (writes files, runs commands) while HY3 is the brain (agentic coding and tool calling), and you can swap the model in the config or have Claude/Claude Desktop set it up. If rate-limited, you can switch to OmniRoot, another free API, and also use HY3 inside Hermes as a free agent profile.00:00 Free Codex With HY300:35 Workspace Demo01:08 Setup Via OpenRouter02:10 HY3 Coder Alternative02:44 Hands And Brain Explained03:36 Hermes And OmniRoot04:29 Live Task Switching05:23 HY3 Performance Benchmarks06:11 Token Saving Workflow07:16 Get The Full Agent OS08:22 Final Thanks