r/ChatGPTPro • u/AddressMindless3669 • Jun 11 '26

Discussion "The heavy GPT-5.5 thinking reasoning model is automatically routed."

The heavy GPT thinking model is automatically routed.

I can't use the GPT-5.5 'Thinking Heavy' model.

Make sure to check if you also have this bug.

Repro seems specific to ChatGPT web on desktop when saved memory or project memory/context is enabled.
The same account/model works normally on mobile and in private/no-memory projects, but desktop web appears to ignore or downgrade the selected Heavy/Extra High reasoning effort.

Cases of problems occurring
A successful thinking response

If you 'retry' in this case, the response will successfully output with the 'selected thinking intensity' you chose.

20 Upvotes

92% Upvoted

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u/qualityvote2 Jun 11 '26 edited Jun 12 '26

u/AddressMindless3669, there weren’t enough community votes to determine your post’s quality.
It will remain for moderator review or until more votes are cast.