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Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by PhunkyPhil on Monday November 09, 2026 @01:16PM (#50429301)
I don't have any evidence/study to substantiate this but I have the feeling there's a _massive_ amount of fiddling with the quant/functionality of the models at different stages of the release cycle and account freshness.

Every time a new model drops it feels wildly powerful, then regresses to some sort of generic SOTA level we've been used to over the last 6 months.

I remember my first coding prompt with, I think it was sonnet 4.6, on a fresh account and it was shocking how much it successfully did off a single prompt - I haven't found that with any other model at any other time and I suspect it was because they put me at the top of the priority list to get a "wow" reaction.

Regression after a release is pretty well-agreed upon, but I'm wondering if they secretly have a huge amount in the tank they aren't releasing. Either as a card to play in the future, or because they can't keep up with demand. I've heard anecdotes of people working with these companies saying that the public models aren't even close to their actual capabilities... Anyone have any opinion on this?

Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by RobotToaster on Monday November 09, 2026 @01:27PM (#50429468)
They probably keep it at "full power" when released because that's when most people will be running benchmarks, then cripple it to save money.
Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by WarmWash on Monday November 09, 2026 @01:33PM (#50429540)
It's more likely it follows the compute demands of the development cycle.
Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by pc86 on Monday November 09, 2026 @01:36PM (#50429585)
In a just world this would be considered consumer fraud, or defrauding investors. Things that if you read the law you would imagine that it came with tens or hundreds of millions of dollars in fines and/or jail time for everyone up and down the chain.

If you're selling model capabilities for money, and you change the mobile capabilities, not changing the model designator (name and/or version number) is fraud, full stop.

Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by Obscurity4340 on Monday November 09, 2026 @01:46PM (#50429750)
DeepSeek flash doesnt have this problem. Im routinely astounded how much i was being gypoed
Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by woodson on Monday November 09, 2026 @01:47PM (#50429767)
A VW engineer got jail time for Dieselgate, right?
Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by _blk on Monday November 09, 2026 @02:06PM (#50430086)
Hopefully that was a manager and not an engineer otherwise I'm fearful of doing any engineering in ${conviction location} (Germany?)
Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by FireBeyond on Monday November 09, 2026 @03:13PM (#50431275)
Mindblowingly, the CEO and 4 execs.

Unlike here where the "phantom bank accounts" fraud was successfully pinned on tellers and branch managers who were all "independently" just trying to meet management goals...

Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by pc86 on Monday November 09, 2026 @03:43PM (#50431794)
Hopefully it was every involved from top to bottom. Crime is crime.

And yes, if you're doing engineering that violates the law, you should be fearful of doing. That's kind of the point of punishing criminals.

Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by woodson on Monday November 09, 2026 @03:58PM (#50432022)
> A Volkswagen engineer was sentenced today by U.S. District Judge Sean F. Cox of the Eastern District of Michigan to 40 months in federal prison, and two years of supervised release, for his role in a nearly 10-year conspiracy to defraud U.S. regulators and Volkswagen customers

https://www.justice.gov/archives/opa/pr/volkswagen-engineer-...

Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by onlyrealcuzzo on Monday November 09, 2026 @01:28PM (#50429480)
I noticed an enormous drop in quality around this time.

Opus 5.5 was significantly crushing every task I gave it for quite some time.

Suddenly, it starts making the type of mistakes that even Sol 5.6 would not make. It became noticeably worse than Astra.

I've grown so completely tired of the labs changing the quality of the model out from under our feet that I CANNOT wait until there's viable alternatives at the frontier level.

I will gladly forgo the best available power for consistency - and I see that coming soon (hopefully with Qwen 4 or shortly after).

DeepSeek v4.1 Flash is not even remotely in the same league as an un-nerfed Astra or Opus 5.5 - despite what microbenchmarks may claim.

It's a great model, especially for the cost - but there's a huge difference.

Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by vadansky on Monday November 09, 2026 @01:58PM (#50429942)
Same. I'm doing something security related right now and I swear it was smarter than this before. Right now it keeps pushing me to just allow all connections, or leave a password in plain text, or other insane suggestions. Maybe placebo, maybe bad timing though, but it feels ridiculous.
Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by _doctor_love on Monday November 09, 2026 @01:32PM (#50429537)
> I don't have any evidence/study to substantiate this but I have the feeling there's a _massive_ amount of fiddling with the quant/functionality of the models at different stages of the release cycle and account freshness.

Oh good Lord, they stir the pots constantly. Anthropic is hella naughty about this. Someone else on HN said it well, Anthropic has too much of a "researcher" mindset. You cant experiment on human populations tool use the same way you run AI/ML experiments.

I want a stable tool that works consistently, not a hammer that changes mid-swing (credit Mario Zechner for this analogy).

Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by brainwad on Monday November 09, 2026 @01:53PM (#50429855)
> You cant experiment on human populations tool use the same way you run AI/ML experiments.

Google and Facebook have proven otherwise. Unless you are very, very lucky you are always part of multiple running experiments on their products, and nobody really cares.

Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by _blk on Monday November 09, 2026 @02:12PM (#50430170)
If it's mostly indiscernible from baseline that's perfectly fine and allows for incremental improvement. Think infinitesimal changes in light of multiple dimensions. When you have separate development and stable versions there's always the risk of packing too many large changes and no one actually wanting to upgrade (given a choice) because the product is already good enough. Pro and con for both approaches but IMO, you need mostly small changes and occasional big steps when small ones can't get you there.
Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by monkeydust on Monday November 09, 2026 @01:38PM (#50429632)
It's kind of crazy they can do this without informing customers. Essentially we like many other knowledge working companies are slowly outsourcing intelligence to a 3rd party that can, at will it seems, alter that intelligence without informing us. Just means we have to invest more in harnesses, guardrails and keep active in open model space.
Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by youngprogrammer on Monday November 09, 2026 @02:20PM (#50430321)
Google isn't informing customers everytime it updates its algorithm
Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by abustamam on Monday November 09, 2026 @03:19PM (#50431382)
1. Two things can suck independently at the same time. One thing sucking is not a justification for another thing sucking.

2. Google doesn't pretend that its algorithm has certain capabilities while serving the user a nerfed version

Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by radlad on Monday November 09, 2026 @05:01PM (#50432879)
I think (2) is the important one. Anthropic provides benchmarks with their model releases. If they are making changes that make models perform worse on advertised benchmarks, how can this be legal?
Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by tortasaur on Monday November 09, 2026 @05:46PM (#50433391)
In fact, people accepting that the new thing can suck is why newer things suck more. That's how the frog boils.
Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by pydry on Monday November 09, 2026 @03:04PM (#50431137)
caveat emptor
Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by Y_Y on Monday November 09, 2026 @05:05PM (#50432924)
But like, you wouldn't say that about other services where we trust the provider out of necessity, like engineering or pharma.
Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by SpicyLemonZest on Monday November 09, 2026 @05:50PM (#50433436)
Seems to me that imposing reputational consequences on supply shenanigans is one of the key ways that an emptor may cavere.
Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by 93po on Monday November 09, 2026 @01:41PM (#50429678)
There's direct evidence - OpenAI employees on twitter (tibo) flatly say they are constantly adjusting models after release, and even specifically state "improvements" to efficiency etc for models post-release. They presumably release to maximize benchmarks at the start, then make them "more efficient", and if you want to give them the benefit of the doubt, then presumably more efficient with negligible loss in benchmark scores.
Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by nickalaso on Monday November 09, 2026 @01:53PM (#50429857)
So, IMO, they have much better capability internally because they have 'unlimited' usage. I also suspect a lot of 'Fable' is just a shit ton of nested subagents doing necessary backend work with a very solid fine tuned LLM conversing with the user.

I worked recently for a German megacorp, for whatever reason they gave us unlimited access to a bunch of models, up to sonnet 4.5/Gpt o1 etc, so not the best or latest models. And no agentic tools.

So I built a custom Claude Code clone because they exposed the api from their custom 'LLM Chat' clone in the client and accepted my user credentials for access.

Essentially a frankenstein AI harness using various models for their strengths, including using the OpenAI best model for memory context consolidation and compaction + Sonnet as orchestrator, etc. I was able to spawn 20+ agents to do my work and basically automate my entire job at that corp. I think my internal bill was something like 5k euros per month and I was being careful to not abuse it...

It was better than the best you could get from claude at the time (about a year ago now I think), in terms of task performance completion.

So imagine what someone with essentially infinite spend can do with endless fable agents. AKA US government and Anthropic internal.

Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by aucisson_masque on Monday November 09, 2026 @05:41PM (#50433317)
> I was able to spawn 20+ agents to do my work and basically automate my entire job at that corp

Not a great plan

Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by CamperBob2 on Monday November 09, 2026 @02:10PM (#50430150)
I'd venture to say they are about to drop Fable 5.5 or perhaps the next Opus version. Over the weekend, their current models were objectively much slower than usual and subjectively not very bright.

I don't know who they think they're fooling.

Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by stefanfisk on Monday November 09, 2026 @02:12PM (#50430183)
Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by mrinterweb on Monday November 09, 2026 @02:44PM (#50430800)
The thing that bothers me is the false advertising. The models are announced with specific capabilities and benchmark scores. Then they silently nerf the models after release. Without a public acknowledgement that a production model has been nerfed and what the new benchmarks are, people are assuming the model has the original capabilities. People are choosing to pay for models based on their reported capabilities. Customers trust these models to deliver the reported capability. It feels like false advertising to me when they say one thing and deliver something less silently hoping no one finds out.

If I order a 16oz beer and get a 12oz pour, I'm going to call it out.

Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by Joker_vD on Monday November 09, 2026 @02:46PM (#50430830)
> If I order a 16oz beer and get a 12oz pour, I'm going to call it out.

And then Sam Altman is gonna sue your ass for owning a measuring cup.

Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by rexpop on Monday November 09, 2026 @03:57PM (#50432010)
This is why somebody should stick a graduated cylinder up his.
Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by rmetzler on Monday November 09, 2026 @05:10PM (#50432980)
I wonder if the questions about the quality in claude code have something to do with it. Like as long as you say it's great, they can take little steps dialing the effort back.
Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by espeed on Monday November 09, 2026 @02:51PM (#50430917)
Last night Fable was so stupid and its responses were LLM babel. After every response, my reaction was "What?". I stopped using it. This morning I wake up to this: "Why are you mixing up the datalog stuff in here? you're working on emacs." It replied, "I did the work the datalog session sent here instead of passing it to you."
Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by tibbon on Monday November 09, 2026 @02:58PM (#50431050)
I had assumed this was just me. I keep seeing the models do things nearly magical upfront, and then regress is subsequent weeks.
Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by j45 on Monday November 09, 2026 @03:12PM (#50431254)
I agree, it seems like they try to find optimization twoards a baseline short and long term, and maybe one for transition time for a new model.
Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by dofm on Monday November 09, 2026 @03:13PM (#50431272)
> Every time a new model drops it feels wildly powerful, then regresses to some sort of generic SOTA level we've been used to over the last 6 months.

Is this 2026's "my macbook feels 'snappy' when I update it", though? (That is to say, not really much in evidence)

House of El covered this in her latest video incidentally.

Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by giancarlostoro on Monday November 09, 2026 @03:31PM (#50431606)
It would be nice if Anthropic would be more transparent about these things.

I'll gladly sign up to be a "Experimental Settings" beta tester (with knobs of how extreme I want to go) for a slight discount (or just bill me the same, just gift me a reset every week? idk whatever).

Doing A/B testing in prod on a frontier model that could really mess with the users in really bad ways is a bad idea.

Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by augment_me on Monday November 09, 2026 @04:41PM (#50432641)
Why would they ever do this instead of just rolling things out like they are now? What is the incentive to give you anything when they can move faster and just get the same result without it?
Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by giancarlostoro on Monday November 09, 2026 @04:44PM (#50432678)
Because sometimes when they do these things some users are affected for weeks and leave for competitors, I guess they don't care as long as they don't have to be beholden to stock investors, but eventually that too will matter.
Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by augment_me on Monday November 09, 2026 @05:03PM (#50432903)
Don't you think that this is a calculated trade-off? You can roll out the A/B testing to 2%, or 10%, or 50%. There are statistics on all this. Individual user feedback is irrelevant.
Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by NewsaHackO on Monday November 09, 2026 @03:53PM (#50431961)
I feel like I am taking crazy pills when reading the other responses, but come on, this seems like normal human psychology when being exposed to a new thing over and over. It feels new, it solves everything, but then over time you get bored with it. Attempting to proxy it with "account freshness" just masks the problem. It's the reason why people tried to quantify it with stuff like https://github.com/ninjahawk/livenerf because the pattern you are referring to is a known bias.
Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by nickalaso on Monday November 09, 2026 @04:00PM (#50432057)
https://www.reddit.com/r/ClaudeCode/comments/1xr9x5y/the_ner... ---> Interesting reddit thread going over what appears to be evidence of this kind of behavior from Anthropic.
Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by makmanalp on Monday November 09, 2026 @05:48PM (#50433409)
[delayed]
Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by pier25 on Monday November 09, 2026 @04:19PM (#50432331)
> Either as a card to play in the future, or because they can't keep up with demand.

I suspect it's rather a simple matter of cost.

Re:Is Opus 5.5 nerfed? Thinking patterns changed on November 3 by BeFlatXIII on Monday November 09, 2026 @04:37PM (#50432585)
[delayed]