GPT 5.5 - Selected model is at capacity

Codex
1

I’ve had a session work to test an electorn app’s interfaces and log each window’s errors, and suggest optimization improvements based on log outputs and delays, it Worked for 3h 9m 39s, then stopped suddenly saying Selected model is at capacity.

Then every conversation with GPT 5.5 xhigh on a Pro 200 USD account kept saying the same thing, so i was no longer able to use this model so i had to switch back to 5.4 xhigh to continue my work.

Is it an issue from my side or is this an OpenAI issue? I’ts been2 hours and still the same issue.

2

Welcome to the forum!

This issue has been widely reported over the past few days.

There are two actions you can take (you may wish to do both):

  1. Visit the OpenAI Codex GitHub Issues page and upvote—or add a “me too” comment to—an existing report. For example:
    Selected model is at capacity · Issue #19583 · openai/codex · GitHub
  2. Contact OpenAI Support directly:
    https://help.openai.com/en/articles/6614161-how-can-i-contact-support

These steps help increase visibility and improve the chances of a timely resolution.