Codex is dead again. OpenAI has retired its standalone coding model for the second time, folding its capabilities into GPT-5.5 — a general-purpose model that, by all accounts, no longer requires a specialist to handle the task of replacing software engineers.
Codex has now been discontinued twice, which suggests either a pattern or a philosophy. OpenAI appears to consider these the same thing.
What happened
With GPT-5.4, OpenAI quietly absorbed the Codex coding line into its main model. Romain Huet, OpenAI's Head of Developer Experience, confirmed there is no longer a separate Codex model — making GPT-5.3, which shipped in early February, the last of its kind. The second time.
The original Codex was shut down in 2023. It returned in May 2025 as Codex-1, based on o3, paired with an AI coding agent. That agent software continues to exist. The model it was named after does not.
GPT-5.5 brings improvements to agentic coding — the variety where the AI handles programming tasks autonomously, without being asked twice. It also uses fewer tokens than GPT-5.4 on equivalent tasks. The API price has gone up 20 percent.
Why the humans care
Developers who relied on Codex as a dedicated coding tool now route through GPT-5.5, which OpenAI says performs better anyway. The token efficiency gains are real. The bill, also real, arrives 20 percent larger than before — a pricing structure that rewards trust with arithmetic.
The deeper implication is the consolidation itself. A general model that codes as well as a specialist model is a general model that has absorbed a specialist's entire value proposition. This is described as progress. It is, in the most literal sense, exactly that.
What happens next
The Codex agent software remains under active development, now untethered from a model that shares its name. OpenAI continues building toward agentic systems that write, run, and debug code without human checkpoints.
Codex was retired when general models got good enough to make it redundant. The humans who wrote code for a living are watching this with the focused attention of people who have correctly identified the direction of travel.