openai/codex
Lightweight coding agent that runs in your terminal
Open source alternative to Claude Code
Codex CLI is an open source Rust project by openai, created in April 2025. It has 130,271 stars and 20,536 forks on GitHub and is released under the Apache-2.0 license. Its most recent commit was on Oct 21, 2026, and it has 23,779 open issues. On FindOpenSource.dev it is listed under AI Coding Agents.
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