Slow Performance on M5 MacBook Pro

Open 💬 1 comment Opened Jun 26, 2026 by G-ManiX

What version of the Codex App are you using (From “About Codex” dialog)?

26.623.31921

What subscription do you have?

Pro

What platform is your computer?

Macbook Pro M5 32GB 1TB

What issue are you seeing?

Feedback ID: 019f03d3-8b54-7263-97a9-d98cd19b1023

I experienced performance issue when using Codex if you change thinking levels. It has been very persistent forcing me every time have to reboot machine.

What steps can reproduce the bug?

I am using Chat GPT Pro no matter even if the tokens are at its peak still this issue happens randomly

What is the expected behavior?

I expect with the Mac Specs I have for M5 to be the best with no hussle

Additional information

_No response_

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