Codex pricing is not one number: Codex is bundled into ChatGPT Free, Go, Plus, Pro, Business and Enterprise, each with its own usage allowance, and then extended with token-based credits or an API key. I went through the Codex pricing page, the developer docs and the usage-limit tables to lay out what each tier actually buys, how the per-model limits work, and where the money goes once you hit them. Ask “how much does Codex cost” and the honest answer is “it depends which ChatGPT plan yo...