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Gemini CLI vs OpenCode

A side-by-side comparison of Gemini CLI and OpenCode, two IDE tools, drawn from Ignaite's continuously-verified listings.

Compared from listings verified as of

Gemini CLI

IDE

Google's open-source Gemini AI agent, in your terminal.

View Gemini CLI

OpenCode

IDE

The open-source, provider-agnostic AI coding agent for your terminal, IDE, or desktop.

View OpenCode

At a glance

Feature comparison of Gemini CLI and OpenCode
AttributeGemini CLIOpenCode
CategoryIDEIDE
PricingFREEMIUMFREEMIUM
LicenseOpen coreOpen core
DeploymentLocalLocal
Platforms (differs)CLI, macOS, Linux, WindowsCLI, macOS, Windows, Linux, VS Code extension
Model support (differs)Single model (proprietary)Model-agnostic
Vendor (differs)GoogleAnomaly
Capabilities (differs)
  • Terminal / CLI agent
  • Autonomous coding agent
  • Code generation
  • Sandboxed code execution
  • Tool / function calling
  • Web research agent
  • Autonomous coding agent
  • Terminal / CLI agent
  • Code generation
  • IDE integration
  • Multi-model access

The honest brief

Gemini CLI

Its free tier serves Gemini 2.5 Pro at a 1M-token context via a personal Google account — unusually generous limits for a terminal coding agent.

  • Apache-2.0 and fully open source
  • Generous free tier via Google account
  • Built-in Google Search grounding + MCP
  • Non-interactive mode for CI scripting
  • Locked to Gemini models
  • Younger ecosystem than Claude Code
  • Free-tier request limits and quota throttling

OpenCode

Fully open-source and provider-agnostic where most agent CLIs are vendor-locked — swap among 75+ providers, including local models.

  • Fully open source
  • Swap among many providers and local models
  • Terminal, desktop, and IDE surfaces
  • No code stored on external servers
  • Quality varies with chosen model
  • Fast-moving, frequent releases
  • Zen's curated models cost extra

When to pick which

Both cover Terminal / CLI agent, Autonomous coding agent, and Code generation.

Pick Gemini CLI if you need Sandboxed code execution, Tool / function calling, and Web research agent.

  • Sandboxed code execution (secondary capability)
  • Tool / function calling (secondary capability)
  • Web research agent (secondary capability)

Pick OpenCode if you need IDE integration and Multi-model access.

  • IDE integration (secondary capability)
  • Multi-model access (secondary capability)

They share capabilities, but each leads with different ones as a headline job:

Gemini CLI is built around Terminal / CLI agent.

  • Terminal / CLI agent (primary capability)

OpenCode is built around Code generation.

  • Code generation (primary capability)

They also differ on:

Platforms
CLI, macOS, Linux, Windows · CLI, macOS, Windows, Linux, VS Code extension
Gemini CLI detailsOpenCode detailsAll IDE apps