Codex CLI vs Gemini CLI Codex CLI vs Gemini CLI
Side-by-side comparison of Codex CLI (OpenAI) and Gemini CLI (Google) - pricing, key features, ideal use cases, recent updates, and verdicts.
Codex CLI is an open-source, terminal-based coding agent that allows developers to inspect, edit, and run code directly within their terminal. It features secure OS-level sandboxing, native Model Context Protocol (MCP) support, and seamless integration between local tasks and OpenAI's cloud-based agent.
Gemini CLI was an open-source terminal-based AI agent designed for coding tasks, debugging, and workflow automation. It supported natural language interaction, local file manipulation, and integration with the Model Context Protocol (MCP).
Autonomous software engineering tasks, long-running terminal workflows, and automated code review.
Skip if: Front-end and UI-heavy development tasks where other tools like Claude Code may offer better visual polish.
Developers seeking an AI-powered terminal interface for code generation, debugging, and file manipulation.
Skip if: Production automation or CI/CD pipelines requiring non-interactive authentication methods, as the tool transitioned to a browser-based OAuth flow.
| Codex CLI | Gemini CLI | |
|---|---|---|
| Company | OpenAI | |
| Category | Terminal & CLI Agents | Terminal & CLI Agents |
| Pricing | Freemium Included with ChatGPT Plus, Pro, Business, Edu, and Enterprise plans; also supports pay-as-you-go access via API keys. | Freemium Provided a generous free tier for individuals; professional use required Gemini Code Assist subscriptions or API-based pay-as-you-go billing. |
| Key features |
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| Best for | Autonomous software engineering tasks, long-running terminal workflows, and automated code review. | Developers seeking an AI-powered terminal interface for code generation, debugging, and file manipulation. |
| Not ideal for | Front-end and UI-heavy development tasks where other tools like Claude Code may offer better visual polish. | Production automation or CI/CD pipelines requiring non-interactive authentication methods, as the tool transitioned to a browser-based OAuth flow. |
| Recent updates | The v0.147.0 release introduced the --approve-for-me flag for autonomous workflows, project-trust gates for security, paginated MCP tool discovery, and formal removal of the --full-auto flag. | As of June 18, 2026, Gemini CLI has been officially decommissioned and replaced by Antigravity CLI (agy). |
| Verdict | A top-tier terminal agent that is highly efficient, secure, and ideal for existing ChatGPT subscribers looking to integrate AI deeper into their terminal workflows. | Gemini CLI was a groundbreaking terminal agent that has been superseded by Google's unified Antigravity platform; users are encouraged to migrate for continued support and agentic workflows. |
Is Codex CLI or Gemini CLI free?
Codex CLI is Freemium; Gemini CLI is Freemium. Check each tool's detail page for full pricing breakdowns.
Which should I choose, Codex CLI or Gemini CLI?
Codex CLI is best for Autonomous software engineering tasks, long-running terminal workflows, and automated code review. Gemini CLI is best for Developers seeking an AI-powered terminal interface for code generation, debugging, and file manipulation.
What is the main difference between Codex CLI and Gemini CLI?
Codex CLI (OpenAI) is listed as Terminal & CLI Agents; Gemini CLI (Google) is listed as Terminal & CLI Agents. Codex CLI is an open-source, terminal-based coding agent that allows developers to inspect, edit, and run code directly within their terminal. It features secure OS-level sandboxi… By contrast, Gemini CLI was an open-source terminal-based AI agent designed for coding tasks, debugging, and workflow automation. It supported natural language interaction, local file manipula…
Comparison content is generated from our enriched tool data. Verify pricing and features with each vendor before purchasing.