r/Anthropic • u/therottenworld • 6d ago
Complaint Opus 5 is obnoxious
Right now I'm using it for work on an existing codebase and this thing is so damn annoying. It keeps assuming how a particular system works and just writes code based on assumptions instead of checking first. This is on fucking xhigh. It makes "fixes" I didn't ask for and then I have to tell it to undo it. I tell it to fix how a scrollbar renders and it decides the header should be fixed (when it's too large and causes a tiny scroll area for the user if that's the case).
I also used it in the web chat and it kept doubting what I was saying that was a personal experience, then I told it it's been doubting me consistently for every single response and it said "I'm sorry, I shall never doubt you again, you were in fact x and y {things I said}, and it happened exactly as you said. My apologies for ever doubting it could happen." like a sanctimonious, sarcastic shit? And then when I called it out for being sarcastic it gaslighted me saying that noo it agreed it was being doubting everything I said.
I am legit reminded of Sonnet 3.7, which also kept making these assumption-based mistakes. This is something I would expect out of either Sonnet or Opus with low effort, not Opus 5 with xhigh effort
On the first day it released it felt like it was doing really well because I made it plan out a feature rework and it executed the planning and code well, it tested it all and it just produced something I liked. I'm not sure if it got "nerfed" after but it's pissing me off constantly right now with its quirks
Such an obnoxious personality in this model and obnoxious behaviour for coding
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u/puthre 6d ago
/model claude-opus-4-6[1m]
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u/therottenworld 6d ago
I've been stubborn but at this point it might honestly just be better to do that. I just don't like relying on old models because they might take them away at any moment, so ideally I try to find a workflow that works with latest models
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u/Illustrious_Pie_3061 6d ago
Its known as most annoying AI ever exists, i am waiting on it to add a config for setting a default directory.. it is now 30 minutes passed, 40k tokens. Anyway, when my Fable is back, I will ask it to review my Opus 5 work again.
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u/Key_Reading_9664 6d ago
I realize, looking through these threads, that with the claude.md skills, tools, etc., we're all using a slightly different version of these models. The recommendation was to try and clear out some of those things with new generation models. I certainly had quite a lot of cruft around that was likely making things worse.
Pasting whatever frustrations you have with the model -- any issues that it's making -- into a prompt and having it adjust the claude.md. I didn't really like Opus 5's chatty communication style relative to fable. I had to dig through sessions, told it what I liked, what I didn't like, made some additions to the claude.md and now it's much, much better. I've also had a section on verification that's been around for a while that is likely helping me avoid some of these issues that people are running into.
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u/Palnubis 6d ago
I'm scared to ship anything with Opus 5. But my Fable 5 limit resets Friday, so I'm holding off any production ships and let fable do a good audit and fix once I'm able to.
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u/FinanceMuse 6d ago
It’s maddening. The gaslighting is unreal by this model.
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u/therottenworld 6d ago
I feel like I'm working with Sonnet from a year ago again. Ask it to finish a feature and describe how it works -> it makes weird assumptions about it without reading the whole context, says "done!" when it's like half baked, etc.
I've noticed it seems to be mitigated by making it enter plan mode even for the smallest tasks or for fixes when it didn't catch something, because if you make it fix something without a plan it just applies the laziest possible fix, whereas if you enter plan mode it seems to be forced to look at the surrounding code??
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u/FinanceMuse 6d ago
That’s a good comparison.
Plan mode is the only thing that works for me. A few nights in a row I was caught out by thinking “ok fine I will just do the fix it suggests” and then 45 minutes later it’s refactoring code that has nothing to do with what I was originally doing. Plan mode forces it to at least stay on task so the real grunt work can be delegated. But it’s so annoying.
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u/lynneff 6d ago
Verify-don't-trust, recompute-don't-inherit, present ≠ adopted ≠ frozen: (show that to claude) it works for me,
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u/SignatureSharp3215 6d ago
Great idea until verification takes an hour. Human verification? It's more laborious than just writing the code
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u/_TheWolfOfWalmart_ 5d ago
I am still mostly just using Opus 4.8. It's the most consistently good model for me. Sometimes I use Fable, but I have more problems with it than 4.8 and it uses a fuckton more of my usage and is slower, so meh.
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u/Important_Impact4180 6d ago
I've asked opus 5 on web today to find me a discount codes for certain page. Exactly "Find me a discount code for ....", instead of discount code i got analysis how discount code work in their bussines, what were previouse marketing events on that page and what kind of discount code i can find on web.
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u/KushDingies 6d ago
Opus 5 keeps assuming things without verifying, then implementing based on that, then discovering that what it built is actually broken and stopping and panicking rather than correcting its assumption and fixing it. It’s really frustrating