Open-source coding agents like OpenCode, Cline, and Aider are reshaping the AI dev tools market. And OpenCode's new $10/month tier signals falling LLM costs. These agents act as a layer between developers and LLMs, interpreting tasks, navigating repositories, and coordinating model calls. They offer flexibility, allowing developers to connect their own providers and API keys, and are becoming increasingly popular as a way to manage the economics of running large language models. The emergence of these tools indicates a shift in value towards the agent layer itself, with subscriptions becoming a standard packaging method.