Maybe related to them potentially releasing a new model soon, but in the past week I've spent about 30% of what i've spent in the last month in the last week alone undoing what Opus 5.5 has started doing; it's barely usable at this point.

It lies, ignores instructions, actively invents requirements, and silently breaks parts of my codebase it morally disagrees with and then refuses to fix it. I'm pretty much ready to switch to open source models exclusively once the next generation comes around and they're at previous fable/astra performance.

I'm sick and tired of the bait-and-switch. It's also pretty clear to me that whenever I work on anything even tangentially related to Anthropic's business (I'm looking at you, agent harnesses or storing chat transcripts), it actively deteriorates in quality to the point where I'm left nearly weeping in frustration.

Can't wait for the future in which our corporate overlords pay Anthropic and AI not to advertise, but to silently break and degrade service for people building competing products.

What a brave, new world.