Amazon Q Developer
Amazon Q Developer is the world's most powerful Agentic AI coding assistant from AWS
Codex is OpenAI’s “cloud + local binary AI coding intelligence” (One agent for everywhere you code), which has been fully embedded in the ChatGPT system-wide payment plan. 2025, after its debut in May, the GPT-5-Codex model was upgraded in September, the CLI was made open-source in October, and cloud task billing went live in November. The cloud task billing went live in November. It is no longer a “code completion”, but a virtual programmer that can independently read repositories, change files, run tests, propose PR, and review code. 76.8% of SWE-bench scores and 98% of internal OpenAI engineers’ utilization rate.
List of Core Features (2025 Update)
| Functions | What it can do | 2025 New Killer Apps |
|---|---|---|
| Native Pair Programming | Real-time code chat in terminal/IDE | Auto-Edit mode: one sentence “plus dark mode” → auto diff + preview |
| Cloud Delegate | Drop tasks to the cloud, drink coffee and wait for PR | Parallelize 50+ tasks: each run in a separate sandbox, 7-hour long run without lagging |
| Mobile Code | Kick tasks in ChatGPT App | Review PRs in the subway, merge in seconds |
| GitHub auto-review | @codex call | Run a full set of tests + catch 0-day vulnerabilities with 94% accuracy. |
| Slack assignments | @Codex Fix bugs | Automatically contextualize conversations and deliver solutions in 3 minutes. |
| SDK embedding | GitHub Actions Automated CI repair | Failed job → auto PR |
| AGENTS.md Smart Guidelines | Putting “house rules” in the repository | AI understands your lint rules, test commands, and more! |
| Best-of-N parallel brainstorming | Simultaneously spit out 5 versions to realize | One click to pick the best, save 80% iteration time. |
| Checkpoint + Undo | Every step must be archived | Double-click Esc to rollback, dare to let AI do it alone. |
Four unique features (beat Copilot / Claude Code)
- Local ↔ Cloud Seamless switching Terminal change half → cloud relay → mobile merge, one ChatGPT account for the whole process.
- GPT-5-Codex proprietary model Specialized training 100,000 real PR, code style 99% like people, test coverage +35%.
- Military-grade sandbox Cloud tasks zero extranet, Windows Sandbox + Seatbelt double insurance; local 0 permissions pop-up windows.
- Open source CLI + community plugin GitHub openai/codex has 18k star, 30 days 500+ PR.
Supported environments (full scenario coverage)
- Terminal: npm i -g @openai/codex → codex
- IDE: VS Code / Cursor / Windsurf official extension
- Web: chatgpt.com/codex
- Mobile: ChatGPT iOS/Android App
- Team: Slack, GitHub, GitHub Actions
- API: Responses API (OpenAI SDK compatible)
30 Second Getting Started Guide
- Open the terminal → codex → Login to ChatGPT
- Type: “Implement image upload drag and drop”
- Look at live diff → enter to accept
- “/test” → autocomplete 18 edge cases → all green
- “/pr” → GitHub PR ready for review by @codex
Pricing family bucket (2025.11)
| Plan | Monthly Fee | Codex Amount |
|---|---|---|
| Plus | $20 | Unlimited Local + 50 Hours Cloud |
| Pro | $200 | Unlimited + Best-of-N |
| Team | 25 per person | Share AGENTS.md + Audit |
| Enterprise | Customization | Private Sandbox + 1 week long run |
Student/Open Source → Plus Free for 6 months Excess? Buy on-demand credits ($0.1/minute)
Who is better than Copilot / Claude Code?
| Programs | Codex | Copilot | Claude Code |
|---|---|---|---|
| Cloud Autonomy | 7 hours of parallelism | 3 Minute Limit | 1 hour limit |
| Mobile Native | Full Featured | No | None |
| Review Depth | Running tests to catch bugs | Static lint | Static |
| Open Source CLI | Apache 2.0 | Closed source | Partially open source |
| Models | GPT-5-Codex | GPT-5 mini | Sonnet 4.5 |
| Price threshold | From Plus | Pro+ $39 | Max $100 |
Real Developer Voices
- “It used to take 2 days to refactor 3,000 rows, but now you can sleep in the cloud and wake up with a green PR.” –Duolingo Engineer
- “@codex kills 3 interns at Slack.” –Vanta TL
- “Merged 12 PRs on my phone, client thought I was watching code 7×24.” — Lone Wolf Developer –Lone Wolf Developer
In a nutshell
The Codex of 2025 will be a full-fledged AI employee who can talk locally, run in the cloud, manage a cell phone, and dare to be a full-fledged employee. Open a terminal and hit codex, your code will be 85% less keyboard and 200% more architecture! 🚀
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