- Codex received a significant update in September that targeted real-world software engineering tasks.
- The software engineering agent operates in the cloud and can handle multiple assignments simultaneously.
- 92% of OpenAI engineers are now using Codex, according to company disclosures.
- After the update, weekly pull request completions by engineers using Codex increased by 70%.
- Codex’s usage has grown tenfold since August, as reported at the recent DevDay event.
OpenAI rolled out a major upgrade to its cloud-based software engineering tool, Codex, in September, enhancing its ability to manage real-world programming tasks. The update follows Codex’s initial preview launch in May and aims to improve performance for developers using it for everyday work.
Codex now allows teams to complete multiple software engineering assignments at the same time. After the September update, the tool was cited as a breakthrough for OpenAI. At its October DevDay event, the company stated that 92% of its engineers were integrating Codex into their workflow and that those users saw a 70% increase in completed pull requests each week, based on a statement by Co-founder and President Greg Brockman.
In a public post on X, OpenAI CEO Sam Altman commended the Codex team for their systematic effort to address user feedback after the latest upgrade. Codex lead Thibault “Tibo” Sottiaux also highlighted on X that the tool had its “strongest growth in one day” since the recent update, referencing the launch of gpt-5-codex. Sottiaux referenced their ongoing work to investigate and improve every part of the platform’s system and hardware, stating, “Way to motivate the team during a gnarly investigation that’s making us go through every piece of infra, hardware and line of code in our system.”
Codex, designed for cloud-based engineering workloads, has seen accelerated adoption across OpenAI in recent weeks. Altman said during DevDay that usage has increased tenfold since August, as cited by a ZDNET report.
Earlier this week, OpenAI renewed its partnership with Microsoft Corp. as it shifted to a public benefit corporation structure. Reports indicate that OpenAI is currently discussing an initial public offering, aiming to raise $60 billion and achieve a $1 trillion valuation.
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