OpenAI’s Codex is called open source, but the UI code still seems missing

lucasmeijer · x · 2026-07-28

The post criticizes OpenAI for describing Codex as an open-source harness while the UI code for that harness appears to be missing. It is essentially a complaint about what is and isn’t actually open in the product’s codebase.

As a short industry signal, it’s useful because it highlights the gap between “open-source” branding and the code people can inspect or reuse.

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