Drastic regression in Sonnet 4.5 over the last few days

[0x-Dee-Bugger]

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For the last month and a half of using Sonnet 4.5, it's been amazing. But for the last few days, it feels like a different and worse model. I have to watch it like a hawk and revert mistake after mistake. It's also writing lots of comments, whereas it never did that before. Is there a bug? We want our good model back!
related discussion on reddit: https://www.reddit.com/r/GithubCopilot/comments/1ph7lg4/anyone_else_notice_a_drastic_regression_in_sonnet/

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[TheLifeIsYours]

Bumping this, it's become pretty dumb recently. It has no context clues between messages, it keeps going in circles with "solutions", and generally not using context clues of previous prompts sent moments before.

[alex-nugent]

Same here. Went from amazing to needing to baby sit and spell out everything constantly. Timing with opus 4.5 release is suspect. From now on I will evaluate every model weekly and track this.