Claude Opus 5.5 users report nerfed thinking patterns since November 3

A Hacker News thread asks whether Opus 5.5 was nerfed because its thinking patterns changed on November 3. The thread has 320 points and 217 comments.

Who is affected:

People who use Claude Opus 5.5 may see different reasoning behavior than before November 3.

Suggested next step:

Compare results on your own tasks before and after November 3 and check the thread for details.