Alternatives to Codex CLI
Codex CLI and 4 alternative tools evaluated on the Tekai technology radar.
Codex CLI
SubjectOpenAI's open-source terminal AI coding agent with OS-level sandboxing, subagent delegation, and AGENTS.md support.
vendor Apache-2.0
Alternatives
Claude Code
Anthropic's terminal-based AI coding agent with file access, command execution, layered memory, and MCP integration.
vendor Proprietary
Gemini CLI
Google's open-source terminal AI coding agent using Gemini models with a ReAct loop, 1M token context, and a generous free tier.
open-source Apache-2.0
OpenCode
An open-source AI coding agent with a terminal UI, desktop apps, and IDE extensions, connecting to 75+ LLM providers via the Vercel AI SDK.
open-source MIT
Goose
An open-source, MCP-native on-machine AI agent by Block that autonomously executes multi-step development workflows with any LLM provider.
open-source Apache-2.0
Comparison Summary
| Tool | Radar | Type | License |
|---|---|---|---|
| Codex CLI | trial | vendor | Apache-2.0 |
| Claude Code | trial | vendor | Proprietary |
| Gemini CLI | assess | open-source | Apache-2.0 |
| OpenCode | assess | open-source | MIT |
| Goose | trial | open-source | Apache-2.0 |