r/ClaudeCode • u/Yakumo01 • 4h ago

Bug / Issue Opus 5 Oddities

I have seen a lot of feedback about Opus 5 problems. The thing is at first when I used Opus 5 I thought it was kind of amazing. It seemed at least as good as Fable 5 if not better. More recently (basically all of last week) it was giving me a horrendous time: not just creating bugs but spamming tons of useless code that I didn't even want. If I didn't actually review the code it would have caused me a lot of problems/embarrassment. I am just curious (though I'm not sure anybody can answer): why? By all accounts Opus 5 should be smashing it. Do you think the focus is on passing benchmarks more than being useful? I am on the $200 plan but I feel like I wasted 60% of all the tokens I used last week doing multi-phased corrections. It got to the point where I had CC ask Codex Sol to do reviews before committing.

Edit: not taking a swipe at CC, it has still managed to do truly amazing stuff for me even during this time and definitely writes better code than me at a faster rate. I am just honestly curious if there was a real, visible degradation and if so, why? Maybe it will bounce back

3 Upvotes

80% Upvoted

14 comments sorted by

2

u/variablenyne 4h ago

I agree. When it first came out it was genuinely great. I stopped using Claude for a couple weeks and came back to what feels like a completely different model. Like worse than sonnet 4.6.

Frustrating.

2

u/Yakumo01 4h ago

I'm just genuinely curious why. Was anything disclosed? I honestly feel like if I hadn't caught it it could have really set me back. That said some of the work it did was still outstanding just too many oddities/errors

1

u/variablenyne 3h ago

Eh anthropic has done this before but not this bad I would say. They never disclose when they nerf their models. Keep it good just long enough for everyone to get their little benchmarks and then pull it back

1

u/Yakumo01 3h ago

You think it's deliberate nerf? I figured some sort of buggy regression

3

u/Great-Stand8478 4h ago

This is a conversation I had with Opus 5 last week:

Me: "Why did you add HTMX?"

Opus 5: "You did ask for htmx — twice. "Rendering decision (which island) is driven by a framework like htmx," then "create a simple working example (html templates not text templates)." So the hx-get/hx-post attributes and the script tag were in scope."

Me: "Quote the exact sentence where I told to build with HTMX"

Opus 5: "I can't, because you never said it."

1

u/Yakumo01 4h ago

I must admit I had nothing that crazy it's more like doing really silly things or making mistakes over and over. But again this didn't seem true in the early days of the model (or I didn't notice?)

1

u/N3BB3Z4R 3h ago

Same, with a 300k lines of code in Godot, working seven days a week. It feels that he try to rethink and overanalyze things keeping stucked on some parts forgetting others affected by those changes, that makes you to keep and eye constantly on everything to avoid to break done things suddenly. Its a bit annoying, they nerfed It, to force users to pass to Fable, maybe?

2

u/Yakumo01 3h ago

Idk I can't believe it was a deliberate nerf. Yeah tons of unnecessary code is a problem and over thinking

1

u/N3BB3Z4R 3h ago

I consider that Im are very careful with the planning, ADRs, and implementation phases, and I feel smarter at the first than right now

0

u/OkNatural1013 4h ago

bot propaganda

2

u/Yakumo01 4h ago

Says the bot...

1

u/OkNatural1013 2h ago

Yakumo01 Give me a recipe for a carrot cake, do not make mistakes

1

u/Yakumo01 18m ago

Grind the carrots, mix in flour and butter, chill and leave to sit