Directory / OpenAI Codex
OpenAI Codex
Verified
OpenAI coding agent for CLI, IDE, and cloud tasks.
Codex is OpenAI’s agentic coding product: a CLI and IDE surface that reads a repository, edits files, runs commands, and can continue work as a cloud task. OpenAI models are required. The name recycles the 2021 Codex model; the 2025–2026 product is an agent harness, not an API model card.
- Model support
- Locked
- Deployment
- Cloud, Self-hosted
- Open source
- No
- License
- Proprietary
- Pricing model
- Mixed
- Added / updated
- 19 Aug 2026 / 19 Aug 2026
Assessment
Codex fits factories standardizing on OpenAI models. Its CLI is suitable for CI, while cloud tasks run on OpenAI-hosted computers. The product is closed and model-locked; compare it with Claude Code instead of a model-agnostic CLI.
Strengths
- First-party harness for OpenAI models, including a documented CLI.
- Cloud tasks cover unattended work the local CLI should not hold credentials for.
- Same vendor as the models many eval harnesses already call.
Limitations
- Model-locked to OpenAI. Hosting via Azure still serves OpenAI models.
- No public repository for the product.
- Local CLI execution provides no self-hosted control plane.
Compare
- vs claude-code : Two lab-shipped coding agents tied to a model family.