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I would say "Elected errors _in_ Claude Opus 5" wouldn't be incorrect either.. Opus 5 isn't very reliable for coding and introduces a lot of regressions every single time I use it. Do you have the same experiences?
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I detect the regression already in planning with Opus 5, so I do not let Opus 5 implement anything. But it is a waste of time and tokens! Does planning with Opus 5 works out for you?
It sounds like you just need to correct the plan it lays out to avoid the regression? I'm just looking to debug with you, not defending the model. I've mostly used Opus 5 for code reviews & bugfixes.
Lots of errors. Opus 5 is also giving me many more hallucinations, including things that aren't even in the right territory. It's also telling me that it's making many mistakes, and the language feels off-kilter as if it's not using typical clear phrases.
stop posting these on hn
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Opus 5 isn't very reliable for coding and introduces a lot of regressions every single time I use it. And GPT 5.6 Sol over engineers just about everything. No LLM is perfect, its about learning the issues with each LLM and figuring out if you can live with it. Knowledge means that you can anticipate if it tries to pull something funny, and harness it against that behavior.
Sure, but I am a long time Opus user 4.5,4.6,4.7,4.8 and I wonder what's wrong with 5?
But yes, I also think it's not the greatest model for programming. On the other hand, for agentic tasks that are not programming related it's hard to beat Opus 4.8. It can try different things and pivot even when the user is not great with prompting. 5.0 seems to not be worse, but definitely wastes more tokens and costs more.
These bursts of downtime are one of the reasons I end up with multiple smaller subscriptions between providers. I'd just end up being really annoyed about the downtime if it lands in the middle of a working day.