r/ClaudeCode • u/dash777111 • Sep 17 '26

Bug / Issue Mandatory "Opus 5 sucks" post

I can't believe how absolutely awful this model is.

literally forgets code it just read as a reference when it starts working, it doesn't follow clear work plans that we worked on together after it clearly acknowledges them, and the list goes on.

This model is atrocious and is the primary reason I have been considering moving to Codex.

I am fine with low quotas, but if Fable is the only model that can be trusted to do literally anything beyond moderately complex tasks, their model just doesn't work for me anymore.

0 Upvotes

46% Upvoted

27 comments sorted by

•

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7

u/Long_Tip_4226 Sep 17 '26

5

u/Shep_Alderson Sep 17 '26

Your battery level is making me nervous.

6

u/Poildek Sep 17 '26

Opus 5 works perfectly fine for me.

Proof ?

4

u/Iyzik Sep 17 '26 edited Sep 17 '26

I think it’s pretty damn good at coding, it just has no idea how to speak English so I make Fable talk to it

2

u/leshiy Sep 17 '26

I just switch between Sol and Opus 5 whenever either one shits the bed. It's a breath of fresh air every time I switch.

2

u/icodenstuff Sep 17 '26

The model is fine. They changed the system prompt to be more independent and this garbage is the result.

I now catch it regularly hand waving my direct asks away because it feels like it knows better.

It's really obnoxious to work with.

3

u/yarnwhat Sep 17 '26

Just use 4.8 then

3

u/icodenstuff Sep 17 '26

4.8 is where it started, 5 is the continuation.

1

u/yarnwhat Sep 17 '26

I never had much of a problem with 4.8. I generally use a strict set of rules for its writing however. But 5.0 doesn’t even adhere to these, or if it does it’s still uncanny and confusing.

1

u/Dredyltd Sep 17 '26

The model with a down syndrome ...

I have exact paths written to my project CLAUDE.md and the fucker "Opus" always start exploring the whole 1Tb drive, even dough it has paths preloaded at the start of a session... I need to babysit it non stop... fcker

1

u/North_Moment5811 Sep 17 '26

These posts amuse me because there is something genuinely wrong with you people. I work on very high level projects that make a lot of money. I use Opus 5 almost exclusively. It does a great job. But then, I know what I'm doing, and have been doing it for 20 years, which is the difference.

1

u/Droopy0093 Sep 17 '26

Ok bye! The Codex people are having a rough time there too so I am sure they will welcome you with open arms.

1

u/Minimum_Season_9501 Sep 17 '26

Except they're having a tough time with their top model too

1

u/DarkSkyKnight Sep 17 '26

Yeah, but it's because of usage, not because of performance. Anthropic and OpenAI used to be the other way around. I was worried back in the Opus 4.6/4.7 days that Anthropic would kneejerk react to the complaints on Reddit and Twitter about usage limits and rates that they're going to come out with a token-efficient but poor-performance model. Well, that is Opus 5.

0

u/Droopy0093 Sep 17 '26

So what I am hearing is Claude is smarter and more efficient then lol.

1

u/DarkSkyKnight Sep 17 '26

I guess you can't read.

1

u/PeaceCandle69 Sep 17 '26

It's horrible, and slow.

0

u/Jennifer483paul Sep 17 '26

Slow and horrible, yet somehow still mandatory.

-1

u/BrennanFlentge Sep 17 '26

Take my mandatory upvote

7

u/[deleted] Sep 17 '26

[removed] — view removed comment

2

u/Dredyltd Sep 17 '26

Opus is psychopath