Gemini CLI vs Codex CLI
Gemini CLI
Quick Verdict
Gemini CLI excels at terminal-first workflows and free ai coding with a score of 87/100. Gemini CLI democratizes AI-assisted terminal workflows with a generous free tier that rivals paid alternatives.
Codex CLI
Quick Verdict
Codex CLI excels at terminal-first workflows and open source development with a score of 87/100. Codex CLI is OpenAI's open-source answer to Claude Code, launched February 2026 as a Rust-based terminal agent.
📊 Visual Score Comparison
Side-by-side comparison of key performance metrics across six evaluation criteria
Technical Specifications
| Feature | Gemini CLI | Codex CLI |
|---|---|---|
| Core AI Model(s) | Gemini 3 Pro (most intelligent, 1M context), Gemini 3 Flash (fast, 78% SWE-bench). Configurable model selection. | Not specified |
| Context Window | 1M tokens with Gemini 3 Pro for massive codebase understanding. | Not specified |
| Deployment Options | npm install -g @google/gemini-cli. Open-source for self-hosting and modification. | Not specified |
| Offline Mode | Cloud-based, requires internet for model inference. Local tools can execute offline. | Not specified |
Core Features Comparison
Gemini CLI Features
- Free tier: 60 requests/min, 1000 requests/day with personal Google account
- Gemini 3 Pro and Flash models with 1M token context
- Built-in tools: Google Search grounding, file ops, shell commands, web fetch
- MCP (Model Context Protocol) for custom integrations
- ReAct loop for complex multi-step reasoning
- Open-source under Apache 2.0 license
- VS Code Gemini Code Assist integration
Codex CLI Features
- Open-source terminal agent built in Rust for speed and reliability
- Long-running autonomous task execution with multitasking
- codex-1 model optimized for low-latency code editing
- GitHub push and PR creation directly from terminal
- Sandboxed execution with network-disabled mode for security
- Works alongside Codex Web (cloud) as the local complement
Pricing & Value Analysis
| Aspect | Gemini CLI | Codex CLI |
|---|---|---|
| Pricing URL | View Gemini CLI Pricing | View Codex CLI Pricing |
| Overall Score | 87/100 | 87/100 |
| Best For | Terminal-First Workflows, Free AI Coding, Google Ecosystem Integration, Extensible Automation, Large Context Tasks | Terminal-First Workflows, Open Source Development, Local Code Editing |
Best Use Cases
Gemini CLI Excels At
- Free AI coding assistance with generous rate limits for individual developers and small teams
- Large codebase understanding with 1M token context—analyze entire repositories without truncation
- Extensible automation by connecting Figma, Stripe, Datadog, and other tools via MCP integrations
Codex CLI Excels At
- Local terminal-based agentic coding with OpenAI models
- Autonomous task execution with sandboxed environment for security
- Multitasking across parallel coding tasks from the command line
Performance & Integration
| Category | Gemini CLI | Codex CLI | Winner |
|---|---|---|---|
| IDE Support | Terminal-native, IDE-agnostic. VS Code integration via Gemini Code Assist. | Multiple IDEs supported | Tie |
| Community | Active community | Limited community | Tie |
| Data Richness | Comprehensive | Moderate | Gemini CLI |
| Overall Score | 87/100 | 87/100 | Tie |
The Bottom Line
Both Gemini CLI and Codex CLI are capable AI coding tools, but they serve different needs. Gemini CLI scores higher (87/100 vs 87/100) and excels in terminal-first workflows and free ai coding. The choice depends on your specific workflow, team size, and technical requirements.
Choose Gemini CLI if: you prioritize terminal-first workflows and free ai coding and prefer its specific approach.
Choose Codex CLI if: you prioritize terminal-first workflows and open source development and prefer its specific approach.
Get the full comparison wallchart — scores, features, and decision guide in one printable PDF.