In a video demonstrating the application, Andrew Mayne, who works for OpenAI, says it's a "voice and natural language code creation tool" that works with Python and Javascript. When you're done speaking to it, it runs a terminal to test that the code works.

It's exciting how voice apps using OpenAI Codex can help visually impaired people with coding.

It uses OpenAI's Codex, a "descendent" of GPT-3. OpenAI Codex is trained on a dataset of publicly-available code, like public Github repositories.

Source: https://www.vice.com/en/article/dyveay/learning-to-code-openai-codex-natural-language-processing