Rankings › Coding agents › OpenAI Codex
OpenAI Codex
Ranked #4 in Coding agents
OpenAI's coding agent across CLI, IDE and cloud. Good if you already pay for ChatGPT.
Visit Official Site →Features
- Codex on web, CLI, IDE extension and iOS
- Cloud integrations like automatic GitHub code review and Slack
- API-key mode for CI and automation
- AGENTS.md custom instructions, skills, MCP, subagents
Pricing & free plan
Included in ChatGPT plans: Free $0, Go $8/mo, Plus $20/mo, Pro from $100/mo; or pay API rates with an API key.
Free plan: Yes: limited Codex access on the ChatGPT Free plan (desktop app, subject to rollout).
Researched from the official site on 2026-10-16: openai.com/codex · developers.openai.com/codex/pricing. Prices change; always confirm on the official pricing page.
Deal & discount
Verified code not available yet.
Pros
- Included if you already pay for ChatGPT
- Runs locally, in the cloud and in CI
Cons
- Usage allowance varies by model and task size
- Cloud features are not available with API-key auth
Alternatives
- Claude Code: Terminal-first agent that handles multi-file changes and long tasks well. Best if you're comfortable in a CLI. compare
- Cursor: VS Code-style editor with strong agent mode and tab completion. The easiest daily driver for most builders. compare
- GitHub Copilot: Works in almost every editor and now ships a cloud coding agent. Safe default if your code is on GitHub. compare
- Windsurf: Agentic IDE with a capable assistant (Cascade). A solid Cursor alternative. compare
Related guides
- Best AI Code Editor in 2026: Cursor, Windsurf, Copilot and the Alternatives
- The Best AI Coding Agents for Builders in 2026
- Best AI Tools for Game Developers and Indie Devs
- The Best Free AI Tools for Developers and Vibe Coders
Ready to try OpenAI Codex?
Visit Official Site →OpenAI CodexVisit Official Site →