OpenAI CodexvsPlandex

Full side-by-side comparison — features, pricing, platforms, and which one wins in 2026.

OpenAI Codex

Coding Assistants

Featured

OpenAI coding agent for CLI, IDE, web, desktop, and cloud workflows

Full review →Website ↗

Plandex

Coding Assistants

AI coding agent for complex tasks spanning many files

Full review →Website ↗
FeatureOpenAI CodexPlandex
CategoryCoding AssistantsCoding Assistants
PricingIncluded with eligible ChatGPT plans; additional credits availableFree (open-source)
GitHub Stars
✓ More stars
85k
11k
PlatformsmacOS, Windows, Linux, WebLinux, macOS
Key Features
  • ✓ Terminal coding agent
  • ✓ IDE extension
  • ✓ Web and desktop app
  • ✓ Multi-agent workflows
  • ✓ Cloud environments
  • ✓ Worktrees
  • ✓ PR review
  • ✓ MCP and tool use
  • ✓ Multi-file editing
  • ✓ Version control
  • ✓ Sandbox
  • ✓ Conversation branching
  • ✓ Terminal UI
Pros
  • + Official OpenAI coding agent
  • + Works across CLI, IDE, web, desktop, and cloud
  • + Open-source CLI under Apache-2.0
  • + Strong fit for parallel agent workflows
  • + Designed for end-to-end software tasks and PR review
  • + Multi-file task planning
  • + Version control for AI changes
  • + Terminal-native
  • + Conversation branching
  • + Open-source
Cons
  • − Usage limits vary by ChatGPT plan
  • − Cloud and ChatGPT surfaces are proprietary
  • − Autonomous code changes still require review
  • − Team controls depend on workspace plan
  • − CLI only (no GUI)
  • − Newer project
  • − Requires API key
  • − Limited community
Tags
codingagenticcliideopenaichatgptmulti-agent
codingterminalmulti-fileopen-source

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