Gemini CLI, released by Google in 2025, brings Gemini's models into the terminal as an open-source agentic coding tool, positioned directly against terminal-first competitors like Claude Code and Aider rather than as a graphical IDE experience.
It operates against a real codebase and shell environment, reading files, making edits, and running commands as part of completing a task, with Google backing it with notably generous free usage limits relative to some competitors' paid-only or more restricted free access. Being open source lets developers inspect or extend it directly rather than treating it as a closed product.
Gemini CLI is free to use, with usage limits tied to a Google account. For a developer who wants a terminal-native coding agent backed by Google's Gemini models without a subscription requirement to get started, Gemini CLI's free, open-source access is a direct, low-barrier entry point into this specific style of tool.
