Amazon Q Developer vs Codex: Side-by-Side Comparison 2026
Amazon Q Developer vs Codex comparison 2026. Side-by-side features, pricing & capabilities.
Amazon Q Developer is an editor extension from Amazon (AWS) — ai coding assistant built for aws developers. Codex is an AI agent and a CLI-based coding agent from OpenAI — asynchronous autonomous coding agent.
Amazon Q Developer
Amazon Q Developer — AI Code Assistant from Amazon (AWS). IDE Integration.
- ✓ Code completions
- ✓ AI chat
- ✓ Agentic mode
- ✓ Multi-file editing
- ✓ Terminal commands
Free / $19/mo · 2 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 | Amazon Q Developer | Codex |
|---|---|---|
| Category | Extension | Agent / CLI |
| Starting Price | Free | Free |
| Model Family | Multi-model | GPT / Codex |
| Open Source | No | Yes (CLI) |
Pricing verified Mar 20, 2026. Amazon Q Developer pricing | Codex pricing
Key Differences
- Category: Amazon Q Developer is an editor extension; Codex is an AI agent and a CLI-based coding agent.
- Starting price: Amazon Q Developer starts at $19/mo; Codex starts at $8/mo.
- Model family: Amazon Q Developer uses Multi-model; Codex uses GPT / Codex.
- Open source: Amazon Q Developer: No. Codex: Yes (CLI).
- Bring your own key: Codex supports BYOK; Amazon Q Developer does not.
- Platforms: Amazon Q Developer runs on Desktop, Web; Codex runs on Linux, Web, Windows (experimental), macOS.
- Provider: Amazon Q Developer is built by Amazon (AWS); Codex is built by OpenAI.
Which Should You Choose?
Choose Amazon Q Developer if you want AWS-integrated coding with deep cloud service 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.