Codex
OpenAI's code-generating model, trained on public code repositories; powered GitHub Copilot but is now superseded by GPT-4.
Think of it like
The middle child; impressive at its time but replaced by its smarter sibling.
Example
Codex (2021) was the first model many developers interacted with; it powered Copilot code suggestions.
How it actually works
Codex was GPT-3 fine-tuned on GitHub code. It was good at boilerplate and simple functions but struggled with complex logic. GPT-4 is better; Codex is deprecated.
For product teams
Obsolete; GPT-4 replaced it for better performance.
For engineers
Historical: Codex proved code generation was viable; led to GitHub Copilot adoption.
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