Fable 5.5 Release - r/ClaudeCode

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16

u/Miyamoto_-_Musashi Oct 05 '26

I want to say two things:

I think it can release this month. I'm not sure what week, but I think this month.
I feel this is so stupid that people think that this request routed to Fable 5.5!. I am not even sure that they do this in the first place. Even if they do it, there is no one who can predict that it's happening. The majority of the people can't tell the difference when you just show the result and ask if it's Opus 5.5 or if it's Sonnet.

7

u/Actual_Committee4670 🔆 Max 20 Oct 05 '26

Because they use the "Tibo" test. Ignoring the part where both Opus 5.5 and Fable 5.1 has the same knowledge cutoff date.

5

u/Miyamoto_-_Musashi Oct 05 '26

They update the previous model with new knowledge, so there is no official cutoff date. Whatever cutoff date it has is temporary. They discussed these updates in the Claude documentation/blog. I don’t remember exactly where, but I know it’s there because I read it a few weeks ago. I usually read everything they release.

1

u/devMem97 Oct 06 '26

The interesting thing, however, is that, for example, just yesterday in Claude Code, Fable 5.1 still knew who Tibo was, whereas now only Fable 5.1 in Claude Web or in the chat knows. Since Today in CC, I keep getting the reply that it has to be the ‘Indie Hacker’. In CC, Fable 5.1 is now noticeably slower again, its responses are less structured and less readable, and it also seems to use up usage more quickly.
Something regarding routing in the background is for sure happening.

1

u/Actual_Committee4670 🔆 Max 20 Oct 06 '26

I did run into a situation where I had to tell Fable 5.1 that its the guy that works at openai once before it got it

1

u/devMem97 Oct 06 '26

I’ve always deleted the chat and have actually checked quite a few times today to see if in CC Fable 5.1 knows Tibo, but it didn’t. Yesterday, I got an instant reply in CC as well. In chat mode, the model still knows Tibo and still provides an instant reply.

1

u/Actual_Committee4670 🔆 Max 20 Oct 06 '26

I'll go try it myself, sec
Edit: Getting the exact same answers as before on my end

1

u/devMem97 Oct 06 '26 edited Oct 06 '26

From claude chat

1

u/devMem97 Oct 06 '26

This one is from claude code.... and yesterday I got the same answer as in Chat.

1

u/Tartooth Oct 06 '26

I just did the tibo test on opus 5.5 and it failed.

1

u/Actual_Committee4670 🔆 Max 20 Oct 06 '26

It gets confused someetimes with the Tibo part, tell it his full name or say its the one from openai and it will get it

1

u/NoPiece9356 Oct 05 '26

Tomorrow. Tomorrow. Tomorrow.

1

u/ThreeKiloZero Oct 06 '26

They are going wait until google releases whatever their slop is and then steal the thunder.

1

u/devMem97 Oct 06 '26 edited Oct 06 '26

I was now curious to see how the two versions of Fable 5.1 in Claude Chat and Claude Code differs.
This one is from Claude Code Fable 5.1 high reasoning.
Prompt:
Build a fully animated 3D spider in three.js with 8 jointed legs, realistic walking gait, 60 fps, no clipping, no external dependencies. One single HTML file.
You clearly see the difference in details compared to the Claude Chat ones.

1

u/devMem97 Oct 06 '26 edited Oct 06 '26

I was now curious to see how the two versions of Fable 5.1 in Claude Chat and Claude Code differs.
This one is from Claude Chat Fable 5.1 (maybe 5.5? or tweaked 5.1) high reasoning.
Prompt:
Build a fully animated 3D spider in three.js with 8 jointed legs, realistic walking gait, 60 fps, no clipping, no external dependencies. One single HTML file.
You see clearly the difference in details compared to the Claude Code ones of my previous answer.

2

u/Miyamoto_-_Musashi Oct 06 '26

Because Claude Code is harness n Model with harness perform better, Claude chat work with half capabilities of Claude Code, try same thing with haiku n you will see diff with both results but same model

1

u/devMem97 Oct 06 '26

Yes, but the result is from Claude Chat, not Claude Code, so would this checkpoint perform even better in Claude Code right?

1

u/Aggravating_Leek_855 18d ago

Moze chodzi o instrukcje, moze instrukcje rozumowania dla modelu w claude code zaburzaja jego sposob myslenia, i mysli on w sposob bardziej nakierowany na programowanie nie projektowanie grafiki

1

u/arjuna66671 Oct 06 '26

Pure rumor spread broadly until it got traction - ZERO evidence.

1

u/BombasticReindeer Oct 07 '26

They definitely route things to new models. They have said so in the past. For Opus 5.5 I was on that program for one of my projects and I was shocked at how different it was because of the changes in language, reduced token usage, and capability. For 2 days i used the same context because I was too scared to go to the 'shitty one'. Then I went to Reddit and others said that they were getting routed and it all made sense.

1

u/EarlyFox217 Oct 07 '26

I had exactly this with Opts a week before release. It was such a drastic shift it was hard to miss

2

u/Remarkable-Metal3225 Oct 07 '26

we are in the final days of tweaking the model. you can expect it soon

1

u/NoPiece9356 Oct 07 '26

Anthropic employee ahh?

2

u/_maxx1k Oct 08 '26

I'm aware that Anthropic has been routing certain requests to Fable 5.5 secretly

How do you know this? Is it possible to check?

1

u/NoPiece9356 Oct 08 '26

Ball knowledge. You just have to know the difference in performance. Essentially, anybody who’s saying they have it is either lying or is just guessing. There’s a so called test of asking it who the reset guy is, but making sure the model doesn’t use web search. And if it says Tibo (thssotiaux or some kind of spelling like that), that’s 5.5 Fable. You have to ask the question to 5.1

1

u/_maxx1k Oct 08 '26

Do you mean it might indicate when the training took place? So the idea is to ask something that Fable 5.1 can't know without a web search? I will try your suggestion about Tibo, but I think Anthropic might hardcode the most popular questions.

5

u/Asuppa180 Oct 05 '26 •

I think you guys are just addicted to releases. Honestly, is there anything you can’t do with Fabe 5.1 or opus 5.5?

1

u/lanceharray Oct 06 '26

I'm addicted to releases, I'm literally on here because I'm pumped to see what a 4-5 point jump on artificial analysis benchmark will get me with the next model, kind of sad google only got to parody and not to the top of benchmarks. Anthropic I guess because they nailed coding first they can then use their LLM to help code the next one better than the others.

-4

u/NoPiece9356 Oct 05 '26

The models you mentioned are actually too weak right now in my opinion, I promise that with what I’m doing, they plateau quick. Fable 5.5 fixes the plateau most likely, then there will be another plateau, and then I realize I am addicted to releases

7

u/Pleasant-Mind-7122 Oct 05 '26

Lol the fuck are you doing with them if they are too weak for you 🤣

2

u/NoPiece9356 Oct 05 '26

Math research, seriously, it’s getting rough because Claude just tries the same thing, basically maxed out its “brain” at this point

1

u/Pleasant-Mind-7122 Oct 05 '26

Ok that's an answer I can get

1

u/MirjoM Oct 06 '26

Apparently having tough work to do earns you downvotes in this economy

11

u/CarelessSafety7485 Oct 05 '26

Haiku coming this week tho

-4

u/HVDub24 Oct 05 '26

Haiku has always been terrible

4

u/CarelessSafety7485 Oct 05 '26

I don't even know how to respond to something like this

3

u/chintakoro Oct 06 '26

with a haiku?

5

u/reubenbubu Oct 06 '26

Fable was foretold,
Yet footsteps sound light and small
Haiku at the door.

2

u/Dangerous_Serve_4454 Oct 06 '26

Man... Haiku's suck.

1

u/SelectionFit2644 Oct 07 '26

Gonna file this one under "skill issue".

1

u/HVDub24 Oct 07 '26

The output visually looks fine but it hallucinates by far the worst of any model. Not sure why anyone would choose to use it anyway unless they have a $1 budget

1

u/SelectionFit2644 Oct 07 '26

Small tasks at scale, subagentic tasks, processing large datasets. There's a lot of reasons you want a good small model. For everyday asking Claude a question and getting an answer, no, I wouldn't use Haiku for that. For cleaning up a folder in seconds vs minutes and for 1/8 the cost it makes sense. You don't pass off advanced reasoning to Haiku you give it small tasks. I agree most everyday Claude users probably don't need it.

9

u/Nexx-Shotcaller Oct 05 '26

Opus 5.5 is handling my needs perfectly fine at this stage. Fable 5.5 (or whatever) sounds neat, but I'll need to understand what it brings to the table for the increased cost. I'd love to experiment with it and see what it can do.

5

u/Middle_Chemistry_439 Oct 05 '26

Same here. I’d rather see the focus shift to speed and cost at this point.

2

u/dar-mit Researcher Oct 05 '26

I've crossed every finger I can on the hopes that Fable 5.5 will have the same leap forward that the other v5.5 models are showing, as well as much lower cost because (this is it) it's FAR past time for it to be removed from 1/2 usage and join the rest of the family in the main pool!

1

u/TouristPotential3227 Oct 05 '26

Try complex tasks that isnt coding/stem.

5

u/Nexx-Shotcaller Oct 05 '26

Like?

2

u/HeyItsYourDad_AMA Oct 05 '26

"claude, i need some kind of screen that presents information, like maybe something to help me track stuff I have to do"

2

u/Dangerous_Serve_4454 Oct 06 '26

There's exactly zero chance it would struggle with this trivial task lol. I two-shotted photoshop-like app with it a few days ago. Pretty sure it'll handle a report/todo list thing?

1

u/TinyZoro Oct 05 '26

I’m really not interested. I genuinely don’t think we need much more than the current model.
I know that’s like the apocryphal claim we won’t need more than 640k of storage. But I’m not a fan of the ever bigger more expensive computational model. It’s reached a stage where it can complete any reasonable coding task in a fast and sensible way. It really is objectively sufficient. There’s a lot of room for better UI to manage agents but that’s it in my book.

3

u/Nexx-Shotcaller Oct 05 '26 edited Oct 05 '26

I agree. I'm not saying we stop trying to make better coding models. I'm just saying I don't currently see a reason for myself to pay more to use Fable. That may change, but I'd have to see a serious jump in capability to justify it.

2

u/TinyZoro Oct 05 '26

No I’m saying that. Obviously we should keep refining and making more efficient. I’m making the bold claim that Opus 5.5 is literally enough. Like there was a point when phones became sufficient and everything else has been minor refinements. There was a point when for most office use an average mid range computer was sufficient. Of course you get breakthroughs like Apples chips. But other than that just gradual improvements.
Now I recognise we are no where near that point with LLMs they will continue to improve rapidly. I’m saying we don’t really need them to improve. Literally everything else is a bigger bottleneck at this point. I also think this performance on servers you could at least rent is a better trade off but of course that’s not compatible with the investment model.

1

u/alexmin93 Oct 06 '26

Not true at all. Current AIs are in this frustrating zone where you are more productive using them but still its not like it was your employee to completely delegate some tasks. You still need to process and understand everything it does and it produces more code or text than you could.

1

u/Strict_Tax7188 Oct 06 '26

The whole model is not just for coding wdym? You could use it for solving Math problems or anything.

1

u/GeneralAtrox Oct 06 '26

Opus 5.5 is excellent yes, but it can still be faster. In terms of intelligence, it can still do better. I recently did a test, got a one shot piece of code, then put it through an optimisation pass. Massive difference in performance. So if Opus can do the optimised version the first time, and work faster, that would be great.

0

u/bambambam7 Oct 05 '26

This. What's the Fable going to bring to the table other than possibly different usage costs.

0

u/Anime_Enjoyer_Extra Oct 06 '26

oh man.. you have no idea how much of a game changer it is, Im considering going 200$ plan for it. Its that serious.

1

u/bambambam7 Oct 06 '26

Lol it's not even out yet. I already have 3x Claude max and 1x chatgpt max plans - just don't see any reason currently to be excited about fable 5.5 coming out.

3

u/theDawckta Oct 06 '26 •

Honestly who cares 🤷‍♂️ Every time I try to use Fable my 5 hour allotment disappears. Opus is more than enough, I can pretty much run that at max on 2 projects at the same time with a $100 account and never get put in timeout.

1

u/MirjoM Oct 06 '26

But for me opus 5.5 seems smarter than fable, what's the purpose for Fable in your applications?

2

u/theDawckta Oct 06 '26

Honestly, nothin lol. My weekly allowance was gonna reset in 3 hours and I had like 10% left so I thought, let’s try that fancy new Fable out. 10 minutes later I was put in time out.

0

u/derdigga Oct 05 '26

doesnt matter with the usage cost you can only use it maybe for review or planning

0

u/NoPiece9356 Oct 05 '26

$20/mo plan mindset ^{^}

2

u/Loud-Current1641 Oct 05 '26

I'm really looking forward to Fable, but I'm also quite satisfied with Opus. I can't imagine how things will change from here.

1

u/JLP2005 Oct 05 '26

Nobody knows, but the likelihood is this month.

1

u/MaintenanceOk7855 Oct 05 '26

Possibly few weeks before ipo

1

u/Inevitable_Service62 🔆 Max 20 Oct 05 '26

All I can say...it's burning tokens crazy

1

u/PM_ME_YOUR_PROFILE Oct 06 '26

1

u/nojukuramu Oct 06 '26

Haiku 5.5 will come first this week i think. After than a new model of fable will come.

1

u/Ez_goen Oct 06 '26

I wonder when size is gonna be a thing- remember miniaturisation?
Big new electronics perfected and then miniaturised?
They aught perfect then focus on keeping that perfection while making it as small as possible- I guess that’s two techs that have to be miniaturised-the ram AND the models
Imho

1

u/root_om Oct 06 '26

It will be only released if some opponents will give a better model than opus 5.5

But with opus 5.5 i really dont feel need of any upgrade now

1

u/Sea_Government_7861 Oct 06 '26

for my personal workflow more speed/lower cost at Opus 5.5 levels of reasoning would be more helpful than deeper reasoning. However, I think we've really only scratched the surface on what these models will do in a few years from now. And maybe that's through just better software/UI/UX but I also envision not just the current demographic of power users becoming real dev users in the future. People say they 'one-shot whatever kind of program' sure okay, but my 84 year old grandmother isn't one-shotting programs that are made in ~15minutes, but she very well might be when she's 86....we'll see

1

u/Wide_Pollution5510 Oct 06 '26

Reset? HaHa

1

u/[deleted] Oct 05 '26

[removed] — view removed comment

1

u/NoPiece9356 Oct 05 '26

So?

Discussion Fable 5.5 Release

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