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Show HN: MicroCodex Reimplements OpenAI Codex in C++ as a Sub-1MB Binary

First seen · 8/3/2026, 04:11 AMLatest activity · 8/3/2026, 04:11 AM

MicroCodex is a GitHub project that presents a C++ reimplementation of OpenAI/codex, with the stated goal of producing a binary smaller than 1 MB. It was surfaced through a Show HN submission, whose page reports a score of 19 and 20 comments. The project is relevant as an experiment in building a compact coding agent, although the supplied information does not establish feature parity, runtime performance, security properties, or compatibility with the original Codex implementation.

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  1. CommunityHacker News8/3, 04:11 AMnot independentcommunity 19 pts / 20 commentsRepresentative
    Show HN: MicroCodex Reimplements OpenAI Codex in C++ as a Sub-1MB Binary