Augment Code vs Codex: Side-by-Side Comparison 2026

Augment Code vs Codex comparison for 2026. Features, pricing, AI capabilities, and editor support analyzed side by side to help you choose the right coding tool for your workflow.

Augment Code is an editor extension from Augment — context-aware ai coding with deep project understanding. Codex is an AI agent and a CLI-based coding agent from OpenAI — asynchronous autonomous coding agent.

Augment Code

Context-aware AI agent for VS Code, JetBrains, and CLI. Indexes your codebase to provide repo-aware completions and chat. Indie ($20/mo) through Max ($200/mo) plans use a credit-based usage model.

  • ✓ Code completions
  • ✓ AI chat
  • ✓ Agentic mode
  • ✓ Multi-file editing
  • ✓ Test generation

$20/mo · 4 plans

Codex🏆 Approved

OpenAI's autonomous coding agent. Available via web, desktop app (macOS), CLI (macOS/Linux/Windows), and VS Code extension.

  • ✓ Code completions
  • ✓ AI chat
  • ✓ Agentic mode
  • ✓ Multi-file editing
  • ✓ Terminal commands

Free / $8/mo · 6 plans

Feature Augment Code Codex
Category ExtensionAgent / CLI
Starting Price $20/mo Free
Model Family Multi-modelGPT / Codex
Terminal Commands — ✓
Open Source NoYes (CLI)

Pricing verified May 4, 2026. Augment Code pricing | Codex pricing

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Key Differences

  • Category: Augment Code is an editor extension; Codex is an AI agent and a CLI-based coding agent.
  • Free tier: Codex has a free tier; Augment Code does not.
  • Starting price: Augment Code starts at $20/mo; Codex starts at $8/mo.
  • Model family: Augment Code uses Multi-model; Codex uses GPT / Codex.
  • Open source: Augment Code: No. Codex: Yes (CLI).
  • Bring your own key: Codex supports BYOK; Augment Code does not.
  • Platforms: Augment Code runs on Desktop; Codex runs on Linux, Web, Windows (experimental), macOS.
  • Provider: Augment Code is built by Augment; Codex is built by OpenAI.
  • Capabilities: Codex has terminal commands.

Which Should You Choose?

Choose Augment Code if you want 200K token Context Engine for deep project understanding. Choose Codex if you want asynchronous coding tasks you can fire off and review when ready. Read our full reviews to see which fits your workflow.

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