OpenAI Codex
ResearchedCodingAgents
In short
OpenAI Codex is openAI's coding agent; the open-source Codex CLI is a lightweight coding agent that runs in your terminal. It has a free plan; it is open source (Apache-2.0 (Codex CLI)).
Last checked Oct 25, 2026 · Test depth: Researched · Sources
OpenAI Codex pricing and key facts
- Official site
- https://developers.openai.com/codex
- Pricing (as of Oct 25, 2026)
- Included with ChatGPT plans: limited on Free and Go, expanded on Plus and Pro; can also be used with an API key (API pricing).
- Free tier
- Yes
- Open source
- Yes — Apache-2.0 (Codex CLI)
- Repository
- openai/codex · 130,819 stars (as of Oct 25, 2026)
- Test depth
- Researched Compiled from official pages and public sources. Not used hands-on yet.
- Last checked
- Oct 25, 2026
OpenAI Codex score: 82/100
| Test depth | 40 | Researched |
| Value | 100 | free tier/plan verified: +50; OSI open-source license: +30; fully usable for free (open source): +20 |
| Freshness | 100 | checked 0 day(s) before this build |
OpenAI Codex alternatives
| Tool | Free plan | Paid from | Open source | Score |
|---|---|---|---|---|
| OpenAI Codex | Yes | Free / usage-based | Yes | 82 |
| AAider | Yes | Free / usage-based | Yes | 82 |
 Browser Use | Yes | Free / usage-based | Yes | 82 |
 Cline | Yes | Free / usage-based | Yes | 82 |
 CrewAI | Yes | Free / usage-based | Yes | 82 |
 LangGraph | Yes | Free / usage-based | Yes | 82 |
 OpenHands | Yes | Free / usage-based | Yes | 82 |
Alternatives share OpenAI Codex's category and are sorted by score. See the Coding leaderboard.
Sources
- Official pricing / plans page — checked Oct 25, 2026
- GitHub repository (license, stars, last push via GitHub API) — checked Oct 25, 2026
- Logo: fetched from www.google.com on Oct 25, 2026; trademarks belong to their owners.