Codex CLI (ChatGPT login, Pro 20x): frequent ‘stream disconnected before completion’ + repeated ‘Selected model is at capacity’ (Request ID 68f16728-07bb-4a24-b7ca-500757169524)

I’m using Codex CLI on Linux, authenticated via “Sign in with ChatGPT” (not an API key). My account is on a ChatGPT Pro 20x tier. Starting today, reliability has degraded significantly and is seriously impacting usage.

Problem A — Streaming disconnects (incomplete responses):

• During normal prompts, the CLI often fails mid-response with: “stream disconnected before completion … An error occurred while processing your request.”
• This interrupts generation and forces retries; work cannot be completed reliably.
• Example request ID: 68f16728-07bb-4a24-b7ca-500757169524 (please correlate with my timestamps/time zone).

Problem B — Capacity message blocks the selected model:

• Frequently see: “Selected model is at capacity. Please try a different model.”
• This happens repeatedly today (previously rare) and prevents consistent use of the selected model.

Network / environment notes:

• Initially observed on CERN internal network; I also reproduced after switching to a different network, so it’s not isolated to that network.
• OS: Linux (CLI). Codex CLI version: (fill in from codex --version)
• Model selected: (fill in)
• Approx timestamps + timezone: (fill in)

Expected: Stable streaming responses and model access consistent with my plan.
Actual: Frequent disconnects and repeated capacity blocks; overall experience is not acceptable for a paid Pro-tier workflow.

Start at the CLI entry point by collecting codex --version, the selected model, and approximate timestamps with timezone; the issue also supplies request ID 68f16728-07bb-4a24-b7ca-500757169524 for correlation. No source file or test is identified, and the missing environment details must be filled in before completion can be verified.