Gemini Code Assist or Gemini CLI? Google ships both
Google ships two ways to put Gemini in your development loop, and the naming does not help: Gemini Code Assist, the extension for VS Code and JetBrains IDEs, and Gemini CLI, the open-source terminal agent. Teams keep asking which one to standardize on. It is the wrong question.
Under the hood they share a brain: the same long-context Gemini models, the same GEMINI.md context files once you are in agent territory, and increasingly the same engine. Code Assist's agent mode now embeds Gemini CLI's core instead of reimplementing it. What differs is ergonomics. Ergonomics decide everything.
Where each surface wins
| You are mostly doing | Reach for |
|---|---|
| Completion-heavy feature work in one buffer | Code Assist |
| Reviewing and applying inline diffs as you code | Code Assist |
| Pipes, scripts, SSH sessions, batch jobs | Gemini CLI |
| Long-context audits, MCP servers, CI | Gemini CLI |
Code Assist wins when the work centers on the buffer in front of you. Completion while you type, chat that sees the open file, agent mode that applies multi-file changes as diffs you accept in place. If your day is writing code with occasional AI assists, the IDE surface is lower friction: you never context-switch.
The CLI wins the moment work leaves the buffer. It pipes, it scripts, it runs over SSH on the box where the bug actually lives, it loads MCP servers and extensions, and it goes headless in CI. It is also where new agent capability tends to land first. If you have never opened it, the quickstart is a ten-minute investment.
One brain, two mouths. The right choice is per task, not per team.
They meet in the middle
The convergence is the tell. Code Assist swallowed the CLI to power its agent mode; the CLI grew IDE integration so its diffs can render in a proper editor pane instead of a terminal scroll. Even the free tiers are joined: the CLI's individual allowance is provisioned through a Code Assist license. One product, two doors.
The seams still show, though. Settings, tool allowlists, and conversation history do not travel cleanly between the surfaces, so you end up configuring trust twice and re-explaining context when you switch mid-task. Until that heals, running both costs some duplicated setup.
If the dilemma feels familiar, it is the same split JetBrains users face between Junie inside the IDE and terminal agents outside it (I mapped that trade-off in Junie vs terminal agents). The industry keeps arriving at the same shape: an IDE surface for flow, a terminal surface for reach.
So run both — for individuals they cost nothing, and they do not compete for the same moments. My split after a few months: Code Assist for the hours spent inside the editor, the CLI for anything that should be a command. Standardize on the models and the context files, not the surface. And if a team rollout forces a single pick, pick the CLI: an IDE plugin only helps the people in that IDE, but everyone has a terminal.