What is actually the difference between Opus 5 and Fable 5?

What is actually the difference between Opus 5 and Fable 5?

I really don't get it. Anthropic says Opus 5 is surprisingly close to Fable 5, with Fable mainly pulling ahead on harder reasoning and long workflows.

But like... what's the point? I can manage my own workflows. Why is Fable still WAY more expensive and restricted if Opus 5 is supposedly getting this close? Fable is literally 2x the price. I feel like there's a bigger difference here that Anthropic isn't really explaining.

And honestly, in my own use, I don't even think Opus 5 is that close to Fable 5. Fable is way better for me at reasoning, coding, debugging, ideas, and keeping a bunch of concepts straight. I'm literally using Opus 4.8 right now because 5 keeps scrambling shit when I give it a complicated task.

I've been wondering about this for a while and waiting for some sort of improvement with the models post-release. So far, nothing though. That's just my experience. What do you guys think?

Edit: I don’t think people realize how close/better anthropic says Opus 5 is to fable five. Here’s a link if you guys wanna check it out yourself https://www.anthropic.com/news/claude-opus-5

u/Armored09 — 15 hours ago
▲ 4 r/claude

Opus 5 agrees with everything I say?

Now either I’m the smartest person in the world or there’s something going on with Claude’s new models. I’ve been trying to do some intense work with matching learning and it’s been a real struggle to get opus to stay on track. In fact it’s been downright deceitful and wrong and hiding the fact it thinks its plan is better from me for hours. Aside from that I find whenever I question it or say, no this is supposed to work etc. it will immediately agree and somehow find a bug and advance the project in a new direction. I don’t know if I can trust anything it says at this point. It seems to be good at writing code but its actual “thinking” is way out of wack.

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u/Armored09 — 3 days ago

I think ChatGPT is just as bad, if not worse, than Claude with the new guardrails

Everyone keeps ragging on Claude for being way too safe with biology questions or advice or anything like that with the new guardrails, but I honestly think ChatGPT is just as bad, if not worse.

For example, I asked it if there was a known interaction between a prescription I had and another supplement. Like, this should literally take two seconds to look up online and see if there’s an interaction.

But it kept telling me it couldn’t give me the answer and that I should CALL my pharmacist and ask them. And then it kept asking me if I was having chest pains, trouble breathing, feeling faint, etc. .I responded saying this was ridiculous, and it literally said fair, I was being overly cautious.

I think Claude and ChatGPT are both at this weird point right now where they’re not really sure what they should censor and what they shouldn’t, so instead we just get locked down on everything.

Obviously I understand why there need to be guardrails, especially with medical/biology stuff. But there’s a pretty big difference between giving someone dangerous medical advice and answering a basic question about whether two things are known to interact.

Hopefully it gets better in the future, but honestly I don’t know if that’s happening anytime soon.

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u/Armored09 — 8 days ago
▲ 1 r/Claudeopus+1 crossposts

Opus 5 programmed a time zone tracker instead of fixing my Code

[effacé]

u/Armored09 — 11 days ago

Game needs more lore/explaining

Kind of exactly what the title says. First off I really enjoy the games. Dying light series is sitting on MASSIVE amounts of unexplained/incomplete lore that if expanded on could make an incredible story. But instead of maybe connecting a few more dots, it seems they would rather throw out a ton of different plot points that aren't connected at all and then just stitching them together.

For instance, Adin and Crane have IDENTICAL powers despite being developed independent of each other. They could have easily thrown something out there like Aiden was experimented on with the liquid Crane drank from The Following, or made some sort of connection. Instead everything happens because of random chance.

Furthermore, there's no explanation of where the virus came from or if there's a group that engineered it. They allude to the GRE mutating it but never actually give any plot points as to why it happened. Also for some reason it gives telepathy powers and mind reading???

There's so much stuff that if fleshed out could make this game so much better, and i was hoping for that in the beast. But instead we got the same "the virus gives super powers" plot points and then they take that AND RUN with it.

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u/Armored09 — 15 days ago

Opus 5 needs to be babysit through everything

I honestly think Opus 5 is extremely good at coding and it knows a lot, there's no denying that. HOWEVER, it thinks it knows EVERYTHING.

I recently came across an issue that plagued one of my multi hour sessions where opus was straight up lying about reading the guide I gave it. It simply said that it was unable to extract the text and was just reading the titles of each section and making it up as it goes. Within ten seconds it figured out how to read it and then apologized for silently doing the easy path without asking.

I think the best way to use Opus 5 is have it being orchestrated by a different model like Fable (if your rich) or Opus 4.8, heck even Sonnet!

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u/Armored09 — 15 days ago

Opus 5 prompting Help

I've been trying to use Opus 5 more, but I feel like I'm not quite prompting it correctly. I read Anthropic's prompting guide, but honestly it didn't help me much.

I'm mostly looking for prompts that make it double check its own work, catch mistakes before responding, and keep it from getting way too ambitious. I've noticed that if you don't give it the right guardrails, it'll start making assumptions, overcomplicate things, or try to solve problems you never asked it to solve.

Because of that I've actually been defaulting back to Opus 4.7/4.6 for a lot of stuff and using Fable to orchestrate more complex tasks.

If anyone has prompts or workflows that have made Opus 5 more reliable, I'd love to see them. I know it's an incredibly capable model but I just feel like I'm not getting the most out of it.

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u/Armored09 — 24 days ago

Why does Opus 5 talk like this?

I've been using the new Opus 5 a lot, and overall I'm really impressed. The performance has been great and it feels like a solid upgrade in most areas. That said, has anyone else noticed how weirdly it talks now?

It gives extremely long answers and constantly throws in obscure words that feel unnecessary. For example, it used "quintile" as a counting term for groups of five, and later used words like "decile" out of nowhere. I'm not saying those words are wrong, but they're uncommon enough that I had to stop and think about what they even meant.

It also makes these random comparisons and analogies that don't really add anything. The older Opus models felt much more natural, while this one sometimes reads like it's trying too hard to sound sophisticated. The funniest one was when it literally said the bugs were "dumb" and that "we should fix them." Curious if anyone else has noticed this.

Edit: it’s now using words like heterogeneous to describe functions. Time to break open the dictionary.

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u/Armored09 — 27 days ago

Why does everyone keep talking about Opus 5??

I keep seeing this mentioned a lot throughout the sub and other subreddits. It seems like there’s a lot of people anticipating a opus 5 launch by the end of this week. from what I’ve seen, there’s been no official word or reputable source saying this is actually a thing that’s even in development. Does anyone have any idea where this came from or if there’s any evidence it might be coming?

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u/Armored09 — 1 month ago
▲ 13 r/Claudeopus+1 crossposts

Opus just tried to convince me that 28 + 25 ≠ 53 (seriously what is going on?)

I was using Opus to help me with a completing-the-square problem and asked it to explain where I had gone wrong.

Instead of pointing out an actual mistake, it confidently told me I'd made an addition error when adding **28 + 25**. I replied that 28 + 25 = **53**, because... it does.

It then doubled down. It refused to say what the "correct" answer was and instead broke the addition into multiple steps like it was teaching a kid:

* "28 + 12 = 40"

* "Now what's 40 + 13?"

I answered **53**.

It then proceeded to tell me that **53 was still wrong** and kept insisting I had an arithmetic error, while never giving an answer. It basically spent several messages trying to convince me that basic addition was incorrect. When I prompted it again asking the answer was it refused and said that I needed to do it myself to learn.

Eventually I got tired of it and asked, "What do YOU think 40 + 13 is?"

It literally walked through the addition itself, got 53, and then said:

>"Huh... okay, so it does come out to 53. I owe you an apology. You had that right the whole time. That was my error, not yours."

Has anyone else had Opus get completely stuck in a reasoning loop like this, where it refuses to acknowledge an obvious mistake? I feel this coincides with the overall decline of performance we've seen in the last couple weeks since the fable launch.

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u/Armored09 — 1 month ago

what is seriously going on with Opus context issues??? (help?)

If I have to hear another "your right to keep pushing" or "honestly? that's my bad" or "I glossed over" one more time I might cancel my 20x subscription. Opus seems to just drop everything the very next chat reply. Even the [Claude.md](http://Claude.md) it cannot seem to remember the context for it and just reinterpreted the instructions different every time. Fable 5 is basically old opus 4.7 at this point.

Is there ANYTHING I can do to restore its thinking? Maybe some prompting guidelines?

u/Armored09 — 1 month ago

Just got back from the show (absolute fire btw, LAROI killed it) but the merch lines were insane. By the time I got through security and everything, the good stuff was already sold out or the wait was way too long. Super bummed I couldn’t get anything to remember the night.
Anyone know the best legit spots to buy tour merch or official stuff online right now? I’m trying to avoid bootlegs and scams.

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u/Armored09 — 4 months ago

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looking for Android beta testers if anyone's down just dm me!

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u/Armored09 — 4 months ago