Coding Agents

OpenAI Codex CLI

OpenAI's coding agent — delegate tasks from the CLI or cloud and get back reviewed diffs.

As of 1 September 2026, OpenAI Codex CLI ranks 6th of 29 in Coding Agents on the Agent Reality Index — scored 66.6 of 100, led by market demand.

#666.6Index / 100

Score breakdown

Market demand63
Developer adoption55
Real usage94
Momentum64
Production readiness61
Community43

Why this rank: the index weights market demand most heavily — how much OpenAI Codex CLI is actually searched for and asked about inside AI tools.

Real-world demand

22kGoogle searches / mo
321AI / LLM searches / mo
121kGitHub stars

Demand measured via Disambiguated brand search · confidence: medium

GitHub repository ↗Full Coding Agents board →Methodology →
Common questions

OpenAI Codex CLI — frequently asked questions

What is OpenAI Codex CLI?

OpenAI's coding agent — delegate tasks from the CLI or cloud and get back reviewed diffs. It is tracked in the Coding Agents category of the Agent Reality Index.

What is OpenAI Codex CLI's Agent Reality Index ranking?

As of 1 September 2026, OpenAI Codex CLI ranks 6th of 29 in Coding Agents, with an overall Agent Reality Index score of 66.6 of 100.

How is OpenAI Codex CLI scored?

The index blends six real-world signals — market demand (weighted most heavily), developer adoption, real usage, momentum, production-readiness, and community — into a 0–100 score, rather than relying on GitHub stars or vendor opinion.

Is OpenAI Codex CLI open source?

OpenAI Codex CLI is open source; its code is publicly available on GitHub.

How popular is OpenAI Codex CLI?

Measured 1 September 2026, OpenAI Codex CLI draws about 22k Google searches a month, around 321 AI and LLM searches, roughly 121k GitHub stars. Demand confidence is rated medium.

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