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OpenAI Codex CLI vs Gemini CLI

Side-by-side facts from official pages, checked 2026-10-12. We do not pick a winner; use the "Best for" row and your own needs.

OpenAI Codex CLI
OpenAIGemini CLI
Google

Pricing tiers

OpenAI Codex CLIIncluded in ChatGPT plans: Free $0, Go $8/mo, Plus $20/mo, Pro $100, $200 or $500/mo; Business, Edu and Enterprise also include it. API-key use is billed at API pricing.

Source: developers.openai.com/codex/pricing · Checked 2026-10-12

Gemini CLIFree with a personal Google account; usage-based billing via Gemini API key for higher limits; paid Gemini Code Assist licenses for organizations. Exact paid prices not stated in the README.

Source: github.com/google-gemini/gemini-cli · Checked 2026-10-12

Free tier

OpenAI Codex CLIYes. Free plan: GPT-6 Luna at Standard speed in the desktop app, subject to rollout. Plus lists Codex in the CLI; the CLI is also usable with an API key. A fixed Free-plan message limit is not published.

Source: developers.openai.com/codex/pricing · Checked 2026-10-12

Gemini CLIYes: 60 requests/min and 1,000 requests/day with a personal Google account (README).

Source: github.com/google-gemini/gemini-cli · Checked 2026-10-12

Models

OpenAI Codex CLIGPT-6.1 Sol, GPT-6 Sol, GPT-6 Luna, GPT-6 Astra (plus GPT-5.6 family, GPT-5.5 retiring Oct 14, 2026). With an API key, the models available to that key.

Source: developers.openai.com/codex/pricing · Checked 2026-10-12

Gemini CLIGemini 3 models, 1M token context window.

Source: github.com/google-gemini/gemini-cli · Checked 2026-10-12

Local vs cloud

OpenAI Codex CLIBoth: local CLI/IDE/desktop chats plus Codex cloud tasks (cloud features not available with API-key auth).

Source: developers.openai.com/codex/pricing · Checked 2026-10-12

Gemini CLILocal CLI in your terminal; models run in Google's cloud.

Source: github.com/google-gemini/gemini-cli · Checked 2026-10-12

Platforms

OpenAI Codex CLICLI, IDE extension, ChatGPT desktop app, web, iOS (Plus and up).

Source: developers.openai.com/codex/pricing · Checked 2026-10-12

Gemini CLITerminal, installed via npm (Node.js). Specific OS list: Unknown.

Source: geminicli.com · Checked 2026-10-12

Key features

OpenAI Codex CLI
  • Local code review with /review
  • Sandboxing and permission controls
  • Worktrees and built-in Git tools
  • AGENTS.md, skills, plugins, MCP
  • Subagents and custom agents
  • GitHub PR delegation and automatic reviews (cloud)
  • codex exec / SDK for scripting and CI

Source: developers.openai.com/codex/pricing · Checked 2026-10-12

Gemini CLI
  • Open source (Apache 2.0)
  • Query and edit large codebases
  • MCP servers
  • Non-interactive scripting
  • GitHub integration (@gemini-cli in issues/PRs)

Source: github.com/google-gemini/gemini-cli · Checked 2026-10-12

Best for

OpenAI Codex CLIChatGPT subscribers who want a terminal agent plus cloud tasks and GitHub review in one plan.

Source: Editorial summary of the sourced facts · Checked 2026-10-12

Gemini CLIDevelopers who want a generous free tier and an open-source terminal agent.

Source: Editorial summary of the sourced facts · Checked 2026-10-12

More comparisons

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