For clarity, while both are called 20X, in Codex they apply specifically to weekly usage limits. And we also don't have 5h limits for both Pro plans.
The Pro 20X is quite precisely 20X the usage of the Plus subscription, so it does exactly what it says on the tin. https://t.co/vMchMCT80Z
context window — The maximum amount of text a model can consider at once — its working memory for the current conversation or task.
AI agent — An AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.
Why it matters
Codex Pro's 20X is measured against Plus on weekly usage, and Codex Pro plans carry no five-hour window, so long AI agentAn AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.Full definition → sessions are bounded by the week rather than by short rolling bursts.
