Codex
OpenAI's coding agent — runs in CLI, IDE, and cloud-hosted runtimes. Drives the Plus/Pro coding workflow.
Capabilities
- terminal
- file_io
- shell_exec
- cloud_runtime
Pricing & license
- Pricing
- Included with ChatGPT Plus/Pro
Base models
Related news
Running Codex safely at OpenAI
OpenAI says it runs Codex with sandboxing, approval gates, network policies, and agent-native telemetry to support secure coding-agent use. These controls are meant to reduce risk while making it possible to adopt Codex in compliant production environments.
Simplex rethinks software development with Codex
Simplex is using ChatGPT Enterprise and Codex to speed up software development, cutting time spent on design, build, and testing while scaling AI-driven workflows. This matters because it shows Codex being used as a practical developer tool in an enterprise setting to compress the software delivery cycle.
Singular Bank helps bankers move fast with ChatGPT and Codex
Singular Bank built Singularity, an internal assistant powered by ChatGPT and Codex, to help bankers with meeting prep, portfolio analysis, and follow-up. The bank says the tool saves each banker 60–90 minutes a day, showing how LLMs can cut repetitive financial work at scale.
How frontier firms are pulling ahead
OpenAI’s B2B Signals research says frontier enterprises are deepening AI adoption by scaling Codex-powered agentic workflows. The report argues this is creating durable competitive advantage, highlighting how firms that operationalize AI more broadly are pulling ahead.
OpenAI models, Codex, and Managed Agents come to AWS
OpenAI GPT models, Codex, and Managed Agents are now available on AWS for enterprises to use within their AWS environments. The move matters because it gives organizations a way to build secure AI workflows on AWS while using OpenAI’s models and agent tooling.
An open-source spec for orchestration: Symphony
Symphony is an open-source specification for Codex orchestration that turns issue trackers into always-on agent systems. It is notable because it aims to boost engineering output and reduce context switching by coordinating work directly from tracked issues.
Working with Codex
OpenAI’s Codex guide explains how to set up a Codex workspace, create threads and projects, manage files, and begin completing tasks step by step. It matters because it provides the basic workflow for using Codex effectively in a structured development environment.
How to get started with Codex
OpenAI’s Codex getting-started guide walks users through setting up projects, creating threads, and completing their first tasks with step-by-step instructions. It matters because it lowers the barrier to using Codex by turning initial setup and workflow basics into a guided process.