These tools competes with
OpenAI Codex CLIvsGemini CLI
OpenAI's open-source terminal agent for autonomous coding tasks versus Google's open-source terminal AI agent
Compare interactively in Explore →Choose OpenAI Codex CLI when…
- •using OpenAI models and want a terminal coding agent
- •prefer open-source with full control over the agent loop
- •need to integrate with existing OpenAI API infrastructure
Choose Gemini CLI when…
- •You want a free terminal AI agent with a 1M token context window
- •You're already using Gemini and want CLI-level access
- •You want an OSS Claude Code alternative backed by Google
Side-by-side comparison
Field
OpenAI Codex CLI
Gemini CLI
Category
Coding Assistants
Coding Assistants
Type
Open Source
Open Source
Free Tier
✗ No
✓ Yes
Pricing Plans
Pay-as-you-go: OpenAI API tokens
Free: Free (Gemini API limits)
GitHub Stars
⭐ 28,000
⭐ 50,000
Health
●90 — Active
●80 — Active
OpenAI Codex CLI
OpenAI Codex CLI is an open-source terminal agent that applies natural language instructions to your local codebase. Running in your terminal, it reads files, writes code, runs tests, and iterates until the task is complete — powered by OpenAI's o4-mini model.
Shared Connections2 tools both integrate with
Only OpenAI Codex CLI (2)
WarpGemini CLI
Only Gemini CLI (2)
OpenAI Codex CLIGoogle Gemini API
Explore the full AI landscape
See how OpenAI Codex CLI and Gemini CLI fit into the bigger picture — 235 tools, 543 relationships, all mapped.