Codex: Developer Replacement or Development Enhancement?

Codex and similar tools provide a coding foundation and inspiration, but humans are the ones who produce the competitive differentiator. 


Codex is shaking up the software development space. Many are wondering: What does it mean for my job? These tools will not replace developers; instead, they will enhance human productivity and performance.

Generative AI has captured the interest of everyone, with ChatGPT, Meta, Google and even Elon Musk rolling out their own versions. Codex is a generative AI tool specifically for developers. Codex functions similarly to ChatGPT and currently powers GitHub’s Copilot code completion tool. GitHub recently rolled out Copilot X with enhanced features, including a code-centric chat function bringing ChatGPT into integrated development environments (IDEs).

While Codex generates content seemingly more relevant to users’ input than previous model generations, sustained use inevitably leads one to realize the model produces a surface-level understanding of a domain with no validation that the output is correct.

Codex and similar tools provide a coding foundation and inspiration, but humans are the ones who produce the competitive differentiator.  

AI streamlines development

Development teams face increasing pressure to accelerate deployment velocity while simultaneously being bombarded with infinite new ways to approach each engineering task. They are constantly looking for ways to automate processes; Codex provides this opportunity.

As a developer, you can enhance productivity by using generative AI as a “boilerplate” generation tool. Development teams can leverage algorithms to add context in the form of comments, request initial documentation from a source file, produce an outline for a technical talk or even generate fundamental components or sections of code. Generative AI can also offer suggestions if you are stuck on code or help you use an unfamiliar syntax.

Codex-type tools allow you to skip over the tedious early steps to work on more engaging and impactful problems. According to GitHub, CopilotX users auto-write and test 46% of the code, making DevOps teams 55% faster in their coding workflows. In addition to accelerating development, eliminating rote tasks enhances developer job satisfaction. Nearly three-quarters of developers using Copilot report feeling less frustrated, with increased capacity to complete more satisfying work. 

Generative AI limitations

There are at least two areas where AI cannot replace humans: logic and creativity.

As we’ve seen with ChatGPT, Codex and other tools are prone to “hallucinations.” They return answers with total confidence, but the results may contain tools that don’t exist or bugs that break existing code. This is where developers become indispensable. Humans can make logical decisions based on the larger context and specific use cases.

In the same vein, Codex is only as good as the prompts you enter. The AI is limited by a finite context window, meaning a human must decide what information will produce useful results. Generative AI’s code may also contain inconsistencies or vulnerabilities that require human identification and remediation.

There’s also the question of intellectual property (IP). Courts are beginning to examine ownership and copyright issues associated with generative AI. While everyone has a right to protect their IP, community and open-source are at the heart of unlocking innovations. I do not condone piracy, but I do believe in community contributions to accelerate technology and humanity. I expect the developer community to eventually reach a level where we protect IP in the right places while still fostering collaboration and innovation at a pace we have yet to imagine.

AI improvements can and should be positive for developers. Yes, the new technology will likely require you to learn new skills like writing prompts, but it will augment your job rather than replace it. With time-consuming menial tasks automated, you have more time to be creative. You can also use AI as a source for problem-solving assistance and idea inspiration.

Technology cannot replicate human ingenuity and problem-solving. We limit innovation by solely relying on AI, but ignoring it yields similarly stagnant results. Change is happening fast — take this opportunity to leverage technology for your benefit.


Adam Frank is a product and technology leader with more than 20 years of development and operations experience. His imagination and passion for creating development and operations solutions are helping developers and innovations around the world. As Armory’s Sr. VP of Product & Marketing, he’s focused on delivering products and strategies that help businesses to digitally transform, carry out organizational change, attain optimal business agility, and unlock innovation through software.