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OpenAI Codex CLI vs OpenCode

A side-by-side comparison of OpenAI Codex CLI and OpenCode, two IDE tools, drawn from Ignaite's continuously-verified listings.

Compared from listings verified as of

OpenAI Codex CLI

IDE

OpenAI's open-source coding agent for the terminal.

View OpenAI Codex CLI

OpenCode

IDE

The open-source, provider-agnostic AI coding agent for your terminal, IDE, or desktop.

View OpenCode

At a glance

Feature comparison of OpenAI Codex CLI and OpenCode
AttributeOpenAI Codex CLIOpenCode
CategoryIDEIDE
PricingFREEMIUMFREEMIUM
LicenseOpen coreOpen core
DeploymentLocalLocal
Platforms (differs)CLI, macOS, Linux, WindowsCLI, macOS, Windows, Linux, VS Code extension
Model support (differs)Single model (proprietary)Model-agnostic
Vendor (differs)OpenAIAnomaly
Capabilities (differs)
  • Autonomous coding agent
  • Terminal / CLI agent
  • Code generation
  • Code review
  • MCP server
  • Autonomous coding agent
  • Terminal / CLI agent
  • Code generation
  • IDE integration
  • Multi-model access

The honest brief

OpenAI Codex CLI

Open-source Rust rewrite of OpenAI's terminal coding agent; sign in with a paid ChatGPT plan or bring your own API key.

  • Runs locally in your terminal
  • Fast Rust implementation
  • MCP tools and parallel subagents
  • Reviewable conversational edit loop
  • Best with OpenAI/GPT models
  • Terminal-only, no full IDE
  • Newer than rival CLIs

OpenCode

Fully open-source and provider-agnostic where most agent CLIs are vendor-locked — swap among 75+ providers, including local models.

  • Fully open source
  • Swap among many providers and local models
  • Terminal, desktop, and IDE surfaces
  • No code stored on external servers
  • Quality varies with chosen model
  • Fast-moving, frequent releases
  • Zen's curated models cost extra

When to pick which

Both cover Autonomous coding agent, Terminal / CLI agent, and Code generation.

Pick OpenAI Codex CLI if you need Code review and MCP server.

  • Code review (secondary capability)
  • MCP server (secondary capability)

Pick OpenCode if you need IDE integration and Multi-model access.

  • IDE integration (secondary capability)
  • Multi-model access (secondary capability)

They share capabilities, but each leads with different ones as a headline job:

OpenAI Codex CLI is built around Terminal / CLI agent.

  • Terminal / CLI agent (primary capability)

OpenCode is built around Code generation.

  • Code generation (primary capability)

They also differ on:

Platforms
CLI, macOS, Linux, Windows · CLI, macOS, Windows, Linux, VS Code extension
OpenAI Codex CLI detailsOpenCode detailsAll IDE apps