Profile “Most used reasoning” shows Max despite exclusively using Ultra

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

26.903.71938 (build 8576), verified from the installed app bundle.

What subscription do you have?

Pro

What platform is your computer?

macOS 26.6.2 (build 25G83), Apple Silicon / arm64.

What issue are you seeing?

In Profile → Activity insights, Most used reasoning displays Max · 49%.

I only use Ultra and never select Max, so this does not match my usage. My current local default also reads model_reasoning_effort = "ultra".

What steps can reproduce the bug?

Observed on my existing account:

1. Use Codex with Ultra selected as the reasoning effort.
2. Open Settings → Profile.
3. Look at Activity insights → Most used reasoning.
4. The displayed value is Max · 49%, despite exclusively selecting Ultra.

I have not tested reproduction on a fresh account.

What is the expected behavior?

The activity summary should reflect the selected reasoning tier, showing Ultra when that is the most-used level. If this statistic intentionally groups or normalizes Ultra into Max, the UI should explain that instead of presenting Max as the tier I selected.

Additional information

The reported label and percentage are transcribed from the profile screenshot. I have not established whether the mismatch comes from labeling, aggregation, or recording the reasoning effort.

Related: #30585 reports Ultra-to-max request normalization with a backend rejection. This report concerns the user-facing Profile statistic and does not establish an execution downgrade.

Start at Settings → Profile → Activity insights and trace how the Most used reasoning value is recorded, aggregated, and labeled. Compare the displayed Max value with the selected Ultra effort and add regression coverage; done when Ultra is shown for Ultra usage or any intentional grouping is clearly explained in the UI.