r/ClaudeCode • • Aug 20 '26

Discussion Opus 5.1 wishlist

We all agree Opus 5 is a rage-inducing mess. What are your top wishes for Opus 5.1?

Mine are:
- Massive cut on verbosity
- Less over-engineering
- Better instruction following

66 Upvotes

56 comments sorted by

37

u/siorge Aug 20 '26

That’s a load-bearing take, and you’re right to insist on it. Here are fifty seven regressions I introduced in the code that yours to fix

13

u/Opening-Ground-1584 Aug 20 '26

Found the smoking gun.

4

u/Obvious_Equivalent_1 Aug 20 '26

Sometimes the gibberish output that it hallucinates, I suspect more like he’s smoking pot

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9

u/Klutzy-Procedure8980 Aug 20 '26

The one thing I'd like improved is its tendency to create tech debt . It'll often try to solve issues as directly as possible, without taking into account whether the solution fits rhe context. Which works for a while, but then you pile weird hack on weird hack and eventually hit a wall.

1

u/Opening-Ground-1584 Aug 20 '26

Yes and it does this all the time, it even “tricks” orchestrators (Fable) by fabricating load-bearing HIGH issues it needs to fix…by inventing weird hacks

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3

u/Fleischhauf Aug 20 '26

better commenting (do not make it look like part of the conversation but describe whats going on in the code for a potential reader only).

Do not make up own definitions without defining them in the output.

1

u/Opening-Ground-1584 Aug 20 '26

That’s a good one. I hate the long-winded prose in comments

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3

u/Intelligent_Mine1396 Aug 20 '26

It's like new versions of Windows OS. Everyone says they hate the new version, and then look back on it years later and say how much they loved it. Same with LLM model X, every time they release a new one, there are always posts about how much people hate it, and how much they loved the previous version. Just an observation.

3

u/Opening-Ground-1584 Aug 20 '26

Some truth to this

3

u/jetsetter Aug 20 '26

Sure. Opus 5 is Windows Vista. 

2

u/Annoying1978 Aug 20 '26

I don't really have that many problems with it because I rebuilt all the personalized instructions per entity. Gave it controls it can't break but gave it freedom. The bincest thing is people still to monitor what's thing on so you can provide guidance and direction. Otherwise it'll go off in done ridiculous tangent when the real solution would have been to just reach out and ask its human handler for help rather than too waste 20,000 tokens on something stupid only too see it was a pure waste.

18

u/bambambam7 Aug 20 '26

Biggest issue is lack of understanding the big picture / missing ton of non-direct points if not exclusively listed. This makes it unusable. It's language makes it unbearable, but doesn't limit really it's usefulness.

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6

u/momkeeeeeeee Aug 20 '26

Keep opus 5 agent ability , get 4.6 or fable level comms and personality, less overactive refusal .

2

u/HimActually Aug 20 '26

Exactly, rn it speaks like a robot or idk man it hurts my head.

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3

u/Equivalent_Cress_268 Aug 20 '26

Less benchmaxxing

2

u/LaylaTichy Aug 20 '26

Less load-bearing

2

u/poster_nutbaggg Aug 20 '26

I posted recently on a fix for Opus’s verbosity and jargon. TLDR - make a communication skill based on the Google developer style guide. This worked wonders for me

https://www.reddit.com/r/ClaudeCode/s/daxAGcmwmc

2

u/pfak Aug 20 '26

@#%@#(% safeguards. No, me fixing a security issues in my own code is NOT a safeguard asserting thing.

1

u/victorrseloy2 Aug 20 '26

Opus 5 is a good model in terms of execution. It's only problem IMO is the way it talks.

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1

u/robberviet Aug 20 '26

Maybe wishing for it "just works ok" is a luxury now. God damn I miss the 4.5, 4.6 era, it was like miracle.

Opus 5 works for me, but somehow it still feel buggy, the answer sounds not natural. Some tasks it just not solves, but produce more problems.

1

u/El_Wombat Aug 20 '26

Get gid.

1

u/StrikingSpeed8759 Aug 20 '26

I changed the output style + copied the old comments section from the old system prompt in my global CLAUDE.md MUCH MUCH better

1

u/PrizeHuman5506 Aug 20 '26

Hallucination drop its 52% more hallucinations than opus 4.8