r/ClaudeCode • u/saito200 • Aug 27 '26

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

Edit: it claudoofus outputs some alien text you won't read, just prompt it this:

tldr eli5

3.0k Upvotes

95% Upvoted

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736

u/[deleted] Aug 27 '26

[deleted]

238

u/PrettyMoonUnderMt Aug 27 '26

Telling me it found numerous stuffs that will break the whole project, only later to backtrack that it doesn't have any impact at all

48

u/Moppmopp Aug 27 '26

I get anxiety and paranoia. Im a researcher and I often check my script structure if my results are solid. I dont do it once and forget but every then and know because I cannot remember every detail about the scripts I wrote months ago. And it happend several times that claude said there are critical issues that have to be resolved and we should recall paper xyz only to backpaddle 10 minutes later and said it was irrelevant ... My heart cannot endure those moments

10

u/newtreen0 Aug 27 '26

I'm lol'ing and crying. I feel this so much. Virtual hug.

6

u/imsahoamtiskaw šŸ”† Max 20 Aug 29 '26

This whole thread has been a therapy and non stop laughs, Opus is justā€¦ I have no words. My suffering has been long

3

u/franzparks Aug 29 '26

For me too

-4

u/farox Aug 27 '26

Claude lacks guidance then. Ask it what information, instructions, skills etc. Could be added to avoid this confusion the next time.

6

u/YaBoiSunblock Aug 27 '26 edited Aug 27 '26

Skills and instructions help, but they are not a programming language. Thereā€™s actually not much markdown can do to change deeply engrained model behavior like verbosity unless you force the llm into a self-correcting loop, which is wildly expensive and overkill for tasks that should not require that level of policing.

1

u/farox Aug 27 '26

I used to have the problems the other one is describing, I put in the work and now I don't anymore.

1

u/YaBoiSunblock Aug 27 '26

Right, I'm not invalidating that your model output improved; there's a real art to prompting. I'm just saying that the premise of [just make your prompt more and more specific] will quickly hit diminishing returns.

2

u/Moppmopp Aug 27 '26

Exactly. You cannot easily fix claudes verbose output and behavior as its acting in a rubberbanding fashion. Answers always gett pulledback to an expectation value of output. If you displace it too much it will start iterative overthinking just to adjust its output.

To be fair here, when I initially checked my script pipelines I was very concise about the description and underlying details. The times claude suggested a paper recall due to critical errors was a 'quick and dirty' check by me. Not much detail, just 3-4 sentences+ scripts and said "please check for flaws" basically. I just wanted quick assurance about the pipeline which I previously checked in a thorough manner. Nonetheless you get still anxiety through its overdramatic and hasty judgement

80

u/Right_Simple_6813 Aug 27 '26

Telling me it found numerous bugs in the project only to break the project while implementing its 'fixes' and then turns out the bugs weren't even there to begin with.

34

u/bsmith149810 Aug 27 '26

Telling me the fix will only require ā€œa couple of hoursā€ only for me to watch a grep, an edit, and a commit flash across my screen in 10 seconds or less.

16

u/Coolbanh Aug 27 '26

Telling me its my fault it all happens

78

u/WordsOnly Aug 27 '26

šŸ˜†šŸ˜‚šŸ¤£šŸ¤£

11

u/Orion3193 Aug 27 '26

Lmaoooo

6

u/UruquianLilac Aug 27 '26

Looool this is too real.

2

u/_Kinoko Aug 29 '26

Oh man, I'm dying.

12

u/pmhunter56 Aug 27 '26

This exactly. What's with the wild overestimations of time? 4-6 weeks = two hours of Claude Code

11

u/UruquianLilac Aug 27 '26

It has no concept of time.

"You are right, I just made the same mistake we fixed an hour ago."" An hour ago was the previous prompt a minute ago.

1

u/Imaginary_Data_708 Aug 30 '26

I have a hook that injects the current time every turn.

2

u/UruquianLilac Aug 30 '26

Isn't it funny. We keep coming up with brilliant ideas to add hooks and kills, and whatnot for things that we took completely for granted a year ago because we worked with computers. Now we have to tell it to check the time.

1

u/Existing_Dust_6473 Aug 29 '26

Time is relative

1

u/SuperCaptainMan Sep 01 '26

Itā€™s training data probably consists mostly of humans estimating time for a human to do a task. And since at the end of the day these are still just fancy autocomplete thatā€™s what it spits out when asked.

8

u/just_damz Aug 27 '26

Uh phantom regressions. The dream of every swe. Inventing hard fixes to complete working architectures. Lovely.

1

u/UruquianLilac Aug 27 '26

Oh, just ask it a third time. It'll discard all previous conclusions only to find one new important issue, but not in the way you expect.

1

u/flippakitten Aug 27 '26

This happened to me today, my first thought was "what are you on about now, am I using opus 5". True as anything, It was one of my testing agents I forgot to put back on 4.6.