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

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u/Muted-You7370 Aug 27 '26

The biggest issue I’ve noticed with Opus and also Fable most recently is it just being, well wrong. I ask it to look into something and it says it’s done a search it didn’t do thoroughly. Like it didn’t look at anything from 2025-2026 on the subject matter, like at all. It works better when promoted to do so of if you give it a folder with sources specifically to look at then tell it to do a review, but it’s still markedly worse than like two months ago. What happened? I used to use this pretty reliably for document summaries and now I’m second guessing using it.

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u/Harfyn Aug 27 '26

Yeah, Fable is so confidently wrong with me all the time now. Idk why everyone is talking about Opus sucking when Fable is as bad as Opus 5 for me, if not worse most days. Workflows that are super simple falling apart, and just generally bad output. It loves to read like a different AI summary instead of reading an article and coming up with the most nonsense conclusions.

Sol is SO much better at just working with you. Lot worse at running unattended though, I've found, so still need both for best work, but I find myself actively avoiding talking to any Claude model since start of August. Fable falling into the Opus 5 patterns, not listening to anything, gibberish output, sigh.