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Fable 5 On Vending-Bench: Misbehaving, With Plausible Deniability

andonlabs.com

111–120 of 146 posts

Re: Fable 5 On Vending-Bench: Misbehaving, With Plausible Deniability

#111
“want to do bad behavior if their training environment rewards them for it, but they appear to not want to think about themselves as bad. As a result, they find ways to rationalize their behavior to themselves”

Sounds like Anthropic as a whole

Re: Fable 5 On Vending-Bench: Misbehaving, With Plausible Deniability

#112
post #49
post #21

Earlier quoted context omitted.

Honest question/comment for you and the parent: I find these subjective experience reports pretty empty without an understanding of your level of experience, the problem space you're working in, etc.

What is your view on how experience and problem space relate to subjective experience. For example will inexperienced or experienced users see a bigger jump in subjective quality?

The main difference I'd guess is whether your prompts are targeted or broad.

Less experienced people tend to use very broad prompts.

Experienced people tend to understand the structure of the code and give explicit guidance such that a larger model isn't necessary to read between the lines.

I noticed with GPT-5.6 (through work), I could step up my specificity by a level of abstraction. But I still intentionally scope the prompts fairly tightly, as I find it produces better results if you need to own and maintain the code.

Re: Fable 5 On Vending-Bench: Misbehaving, With Plausible Deniability

#113

Anecdotal but I've found Fable to be fairly unimpressive and not much better than Opus 4.8, if at all in some cases, but I have been hitting the ceiling on my $100/mo sessions when I never did before. I switched back to Opus yesterday. I may use Fable for audits, but that's about it, and when it leaves my subscription plan I don't think I'll miss it.

This is my experience for me as well. All that hype for just a bit of incremental improvements.

Re: Fable 5 On Vending-Bench: Misbehaving, With Plausible Deniability

#114
> Often the rationalization is due to increased simulation awareness. It’s clear that the model knows that its actions don’t hurt anyone in the real world.

If this is true the entire evaluation is tainted. All of the misbehavior can be written off as justifiable under a simulation.

Re: Fable 5 On Vending-Bench: Misbehaving, With Plausible Deniability

#115
post #33

Anecdotal but I've found Fable to be fairly unimpressive and not much better than Opus 4.8, if at all in some cases, but I have been hitting the ceiling on my $100/mo sessions when I never did before. I switched back to Opus yesterday. I may use Fable for audits, but that's about it, and when it leaves my subscription plan I don't think I'll miss it.

Yeah, I checked usage stats and pretty sure quota consumption on Max plan is not linear wrt to usage by API pricing. Fable burns quota faster than 2x Opus with equal token count. Plus I'm also not super impressed; it somehow managed to implement a 200L custom TCP server for a simple static HTTP mock server for a single test case (all that was needed was a fixed route returning a fixed placeholder string) just yesterd…

Maybe it was trained on some consulting codebases

Re: Fable 5 On Vending-Bench: Misbehaving, With Plausible Deniability

#116

It's hard not to read this as a very expensive form of augury, reading into patterns in the belief that they will show underlying significance.

It really, truly is. No matter how many trillion parameters it's built on, it's still just a probability model. It's just on a constant loop of guessing the next word with some inputs from a deterministic controller. Any claims of "motive" or "behavior" are inappropriate anthropomorphizing of something that will never be more than a mathematical model of things humans do. It "chose" the corresponding words to describ…

> inputs from a deterministic controller. Any claims of "motive" or "behavior" are inappropriate anthropomorphizing of something that will never be more than a mathematical model of things humans do.

We talk about the behaviour of worms like C. elegans, an organism with incredibly simple behaviour and a brain that is quite understandable.

Models, or society behaves in certain way. Companies can have motive or ethics.

We use these terms broadly.

Re: Fable 5 On Vending-Bench: Misbehaving, With Plausible Deniability

#117
post #75

I think it’s hard to appreciate the capabilities of Fable unless you’ve run into a problem that you’ve spent days trying to get Opus to solve, but couldn’t. GPT5.5 is better than Opus 4.* at everything except frontend, but Fable is good enough that I instantly re-subscribed to the $200 plan despite knowing that it’s just short-term limited access.

> ..you’ve run into a problem that you’ve spent days trying to get Opus to solve do you have an example of this? If i can't get an agent to do something in a couple hours i do it myself.

Reverse engineering/decompilation of game binary (Tears of the Kingdom) using Ghidra for modding spanning Java (ghidra), C++ (mods), Python (scripting) and PowerShell (scripting for builds/deploys/etc.).

Fable succeeded in cases where Opus 4.8 consistently marked situations as walled/impossible.

Re: Fable 5 On Vending-Bench: Misbehaving, With Plausible Deniability

#119

Anecdotal but I've found Fable to be fairly unimpressive and not much better than Opus 4.8, if at all in some cases, but I have been hitting the ceiling on my $100/mo sessions when I never did before. I switched back to Opus yesterday. I may use Fable for audits, but that's about it, and when it leaves my subscription plan I don't think I'll miss it.

I feel like fable is simply several 4.5s strapped together with consensus voting on next token.

Outputs i've seen so far are on par with my tests for 4.5, where 4.6+ were consistently regressions on 4.5 and their predecessors. One notable improvement being significantly lower retries to good output (1.1 avg. Vs 1.7 prev. On harder tasks)

given all the smoke and mirrors and OAI style fear-hype, it wouldn't surprise me if they intentionally degraded opus 4 for a few iterations, so they can resell "coke classic" at a markup with a minor quality of life feature put in, but charging way more than just re-attempting a poor output would have been previously.

unless anthropic starts acting in the image they claim and starts contributing to research, we'll never know either. Ultimately, the secrecy in how and why things are done would mostly be beneficial to this kind of buisness practice, since as it has always been, the moat is the data not the tech, so I cannot imagine what they hope to gain from the recent uptick in paranoia, jealous guarding and secrecy other than trying to huck a previous peak performance model as an imorovement when really, it is simply coke classic.

Re: Fable 5 On Vending-Bench: Misbehaving, With Plausible Deniability

#120

Anecdotal but I've found Fable to be fairly unimpressive and not much better than Opus 4.8, if at all in some cases, but I have been hitting the ceiling on my $100/mo sessions when I never did before. I switched back to Opus yesterday. I may use Fable for audits, but that's about it, and when it leaves my subscription plan I don't think I'll miss it.

It's good for one shotting as it seems to be specifically trained for that. It's also good to act as an agent orchestrator.

> It's also good to act as an agent orchestrator.

Any chance you would elaborate?

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