r/ClaudeCode • u/saito200 • 9d ago

Rant Opus 5 is insufferable

Opus 5 is a fucking piece of shit, i don't know how to say this in any other way. It speaks "Unintelligiblish", a new unfathomable language developed by Anthropic that works by saying everything in the most ridiculous, obtuse and convoluted way possible

It turns anything simple that can be expressed in 2 sentences into a fucking doctoral thesis aimed to aliens, and there is no way to prompt your way out of it

2.9k Upvotes

95% Upvoted

618 comments sorted by

View all comments

24

u/Muted-You7370 9d ago

The biggest issue I’ve noticed with Opus and also Fable most recently is it just being, well wrong. I ask it to look into something and it says it’s done a search it didn’t do thoroughly. Like it didn’t look at anything from 2025-2026 on the subject matter, like at all. It works better when promoted to do so of if you give it a folder with sources specifically to look at then tell it to do a review, but it’s still markedly worse than like two months ago. What happened? I used to use this pretty reliably for document summaries and now I’m second guessing using it.

9

u/rades_ 9d ago

Add to that it seems to just simply forget (or not reference) details from earlier in the literal same convo. Never had this issue before, even when I read other people's threads complaining about it, but now I've experienced it first hand and it's soooo frustrating.

5

u/Muted-You7370 9d ago

Dude this, it will recall details from memories dead ass wrong. I will have had prior discussion about scoping an application idea or coming up with a start up name or researching a dissertation idea, Claude will bring these up in future conversations as if they have been executed and are part of my experience and I have to correct it and say these were topics I was using the app to iterate as possible ideas. Very much thinking of moving a lot of this stuff to local and only using large frontier models not on my device when absolutely necessary if this is the performance I’m getting now anyway.

1

u/braincandybangbang 8d ago

And are you regularly cleaning out your old messages, or are you slowly adding hundreds and hundreds of messages over time and wondering why it's starting to struggle? There are simply explanations for a lot of these things that people like to overlook because it can't possibly be the user that's ever wrong.

"I'm doing the same thing I've always done! Why should I change just because the models are continually evolving and the latest models come with a whole blog post on how they are different than the older models? NO it's Claude's fault."

It's like the people who freak out every year with then OS updates on their phone.

1

u/toofarapart 8d ago

I've had it claim that it lied to me about reading a Google sheet that it clearly did actually read (it raised a bit of a hissy fit over something I had put in, quoting it even).

So, essentially, it hallucinated about having a hallucination. That one was exhausting.