ChatGPT Pro (20x) accounts appear to receive Pro 5x Codex usage capacity

What happened?

Multiple active ChatGPT Pro accounts still show the paid Pro (20x) subscription, and the official Codex usage API continues to identify them as plan_type: "pro". However, their effective Codex usage allowance now behaves like the much smaller Pro 5x tier.

The issue is therefore not the displayed subscription name or the plan_type field. It is the amount of usable quota actually allocated to accounts that are still subscribed to Pro (20x).

Observed behavior

• The affected accounts remain active ChatGPT Pro subscriptions.
• The official usage response still reports plan_type: "pro".
• Despite that, usage percentages rise and limits are reached at a level consistent with Pro 5x rather than the expected Pro 20x allowance.
• This was observed across multiple separately subscribed Pro accounts, not just one account.
• The change appeared at roughly the same time across the affected accounts.

Expected behavior

Accounts subscribed to ChatGPT Pro (20x) should receive the corresponding Pro 20x Codex usage allowance.

Actual behavior

The accounts are labeled and authenticated as Pro, but their effective Codex quota appears to be provisioned at approximately the Pro 5x level.

Request

Could the team please investigate the effective quota allocation for active Pro subscriptions, including whether some Pro 20x accounts were accidentally assigned the lower 5x allowance during a quota reset or entitlement rollout?

No account identifiers, email addresses, credentials, or private infrastructure details are included in this report.

No repository files, tests, or entry points are named. Start by examining the official usage API responses for affected Pro accounts and compare the reported plan_type with the observed quota; done means determining whether active Pro subscriptions receive the expected Pro 20x allowance.