Overview

Rating

10.0 / 10

Rating

Best For

Developers who work in the terminal and want a coding agent powered by Gemini models

Best For

Terminal-first developers who want a privacy-respecting, provider-agnostic coding agent with multi-session support

Product Summary

Gemini CLI is Google's open-source AI agent for the terminal, with Gemini models, a 1M token context window, MCP support, and a free tier.

Product Summary

OpenCode is an open-source AI coding agent built for the terminal by Anomaly. It connects to 75+ LLM providers via Models.dev, supports parallel agent sessions on the same project, and has a privacy-first design — no code or context data is ever stored. Available as a TUI, IDE extensions, and a beta desktop app for macOS, Windows, and Linux.

Starting Price

$0Per forever

Free Trial

Yes

Free Version

Yes

Free Version

Yes

Website

geminicli.com

Website

github.com

Key features

Core capabilities each platform advertises.

Gemini CLI

Terminal agent with file, shell, web fetch, and Google Search tools
Gemini models with a 1M token context window
MCP servers and custom extensions
Conversation checkpointing and sandboxed execution

Open Code

Privacy-first — zero retention of code, prompts, or context data
75+ LLM providers via Models.dev (Claude, GPT, Gemini, GitHub Copilot, ChatGPT Plus/Pro, local)
Multi-session capability — run planning + build agents in parallel on the same repo
LSP-enabled code understanding across languages
Shareable session links for debugging and team review

Strengths and tradeoffs

What each tool does well, and the limitations to keep in mind.

Gemini CLI

Pros

Apache 2.0 license
Free tier of 1,000 requests per day with a Google account
1M token context window for large codebases
Headless mode with structured output for scripting

Cons

Works with Gemini models only
Free tier quotas apply per account, so heavy use moves to paid API or license billing
Code Assist quotas are shared with Code Assist's agent mode in the IDE

Open Code

Pros

Open-source under MIT — 147K+ GitHub stars, no vendor lock-in
Privacy-first design with zero data retention
75+ providers including local, GitHub Copilot, and ChatGPT Plus/Pro accounts
Multi-session parallel agents (build + plan modes)
Free with optional Zen service for optimized models

Cons

What people are saying

Gemini CLI

Data not available

Open Code

jeremy_kHacker News

It was the first time I felt like I could write up a large prompt, walk away from my laptop, and come back to a lot of work having been done.

Read full review

Gemini CLI or Open Code — which should you choose?

Choose Gemini CLI if you wantChoose if you want

Querying and editing large codebases from the terminal
Automating rebases, PR queries, and other repo tasks
Running an agent inside CI scripts

Choose Open Code if you wantChoose if you want

Terminal-first AI pair programming for keyboard-driven developers
Privacy-sensitive or air-gapped engineering environments
Parallel agent workflows (planner + builder) on the same codebase
BYOK across many providers without changing tools
Debugging with shareable session traces for team review

Compare Gemini CLI and Open Code on your own traffic

10KFree traces/mo

1,000+Models

5 minSetup

Respan lets you trace LLM and agent calls across any model or framework, A/B test prompts on production traffic, and route requests across 1,000+ models through one gateway.

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Gemini CLI vs Open Code (2026)

Overview

Key features

Strengths and tradeoffs

What people are saying

Gemini CLI or Open Code — which should you choose?

Compare Gemini CLI and Open Code on your own traffic

Frequently Asked Questions

Other popular comparisons

Gemini CLI vs Open Code (2026)

Overview

Key features

Strengths and tradeoffs

What people are saying

Gemini CLI or Open Code — which should you choose?

Compare Gemini CLI and Open Code on your own traffic

Frequently Asked Questions

What is a coding agent?

Will coding agents replace developers?

How do I choose between GitHub Copilot, Cursor, and Claude Code?

Other popular comparisons