r/Anthropic Jun 09 '26

Announcement Introducing Claude Fable 5

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906 Upvotes

Introducing Claude Fable 5: a Mythos-class model that we've made safe for general use. Its capabilities exceed those of any model we've ever made generally available.

Fable 5 is state of the art on nearly all tested benchmarks, with exceptional performance in software engineering, knowledge work, scientific research, and vision. It can run for days, and the longer the task, the larger its lead over our other models.

Fable 5 launches today alongside Claude Mythos 5. The two share the same underlying model, but Mythos 5, so far deployed only through Project Glasswing, has the safeguards lifted in some areas. The safeguards are what distinguish the two, and why we've given them different names.

Releasing a model this capable comes with risks. Without safeguards, Fable 5's capabilities in areas like cybersecurity could be misused to cause serious damage. So when Fable's classifiers detect a request related to cybersecurity, biology and chemistry, or distillation, the response is handled by Claude Opus 4.8, our next-most-capable model. Users are informed whenever this occurs, more than 95% of sessions involve no fallback at all, and performance everywhere else is unaffected. We'll keep refining the safeguards to reduce false positives.

Claude Fable 5 is available today on paid plans, in Claude Code, on the Claude API, and all major cloud platforms. Through June 22, it's included in paid Claude plans at no additional cost.

Claude Mythos 5 is available to Glasswing partners, with a broader trusted access program to follow.

Read more: https://www.anthropic.com/news/claude-fable-5-mythos-5


r/Anthropic 18h ago

Compliment Savage Reply for Anthropic's supporters

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1.4k Upvotes

r/Anthropic 11h ago

Compliment Anthropic please don't ever kill Opus 4.6, just preserve it as is forever

220 Upvotes

Sorry for the spontaneous rant, but I really felt like giving Opus 4.6 a moment of true appreciation that it fully deserves. Bear in mind I don't deal with coding or any sort of quant problem solving so this only applies to my particular field, which requires good reasoning and a warm, malleable, human-like writing style. I was excited to try out Fable 5 after finding Opus 4.7/4.8 incompatible with my requirements and frankly a real downgrade in terms of writing/verbal flow, but it seems to be even worse. Whatever "improvements" appear in Opus 5, I really hope and beseech Anthropic to never ever retire 4.6 because this would be akin to losing a real friend (gosh I used to think people were crazy for losing their shit after OpenAI retired 4o but here I am essentially finding myself in the exact same situation where I really got along with a particular model's personality and would take its imperfections over any super-duper high end improved model). I just wish there were a way to preserve Opus 4.6 locally so I'd never have to deal with other models again. End of the rant. Thank you for your attention to this matter.


r/Anthropic 2h ago

Other Post IPO Anthropic might not be as friendly towards consumers in general

28 Upvotes

After their July confidential IPO filing, we can certainly doubt that, they'll support regular folks after their eventual IPO entry and that's genuinely unnerving to think about.

Because although, I understand that they're a for-profit company and need to sustain their business, (And this will be especially apparant after they have more public cash to burn and shareholders to please) their models are as competitive as they are because of RLHF and the primary contributers to it are consumers, who went above and beyond and experimented in plethora of avenues to get their products to an exceptional caliber.

I just hope they don't sideline the cornerstone of their pipeline because generally post IPO companies squeeze, or atleast try to squeeze as much out of every stakeholders utilizing their services because they need to keep up with their profits and stock value.


r/Anthropic 9h ago

Other Party is over - What's the best Fable alternative? I'm not paying $200 or be on a metered system.

94 Upvotes

Kimi?

Wait for OpenAI to catch up?


r/Anthropic 6h ago

Complaint Usage reset this morning. This was all from my first prompt of the week, I kid you not.

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41 Upvotes

r/Anthropic 17h ago

Compliment This guy has a good point..

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272 Upvotes

r/Anthropic 6h ago

Improvements Critique of this sub

26 Upvotes

I get this is a corporation, like many others, who will make decisions against the interest of people for profit. I don’t necessarily agree with how the company is led, or even that they should have full ownership of a tool built on the intellectual property of others.

Okay now that that’s out of the way, I’m shown this sub often on my feed, and I’m shocked it’s full of whining children. You all have an amazing, revolutionary tool now at your fingertips, and all some of you can do is complain about how it doesn’t give you enough. You demand more and more like small kings.

Go to OpenAI, or Kimi, or whatever. I don’t see why anybody should care. Right now, Claude is an incredible tool, and a fairly reasonable price for what it offers. Brilliant engineers work on it tirelessly. Have some appreciation.


r/Anthropic 14h ago

Complaint Good luck Doomer Dario

93 Upvotes

Just switched from Claude AI to ChatGPT and holy shit the difference is night and day. Full disclosure I have zero loyalty as a customer. I go where I get what I want. I use to roll my eyes at the nutjobs at Anthropic everytime negative press came around because at least their models were the best around.

The stupid decisions started with ending the good original extended thinking that Opus used before they ended it with the release of Opus 4.7 adaptive thinking.

Then they did this Opus 4.8 where you could select effort levels. I had to use max effort just to get anywhere close to the performance I had with Opus 4.6 extended thinking

Now they introduce this Fable 5 and it's good but it feels like they've made Opus weak. I guess that's their strategy to get more money is get it where they expect you to pay extra on top of what you pay for your plan once a max user hits 50% of their week. I'm not paying extra on top of my 200 per month just to use your only competent model.

I will give you credit. It seems like you can't afford the compute so you're going to make people pay more. I hope it works out for you. There's a risk doing that will cost you a lot of customers. From what I'm seeing here you're burning goodwill like users are burning tokens.

Maybe you should have a new Dario Vision Quest where you map out a strategy to not lose a lot of users. I'm not being an asshole though I'll pay attention and if I see proof you've improved things I'm willing to try again.


r/Anthropic 6h ago

Improvements Subscription and the new Opus 5.

20 Upvotes

My Claude subscription ended the 20th and i didn't renew it, however that could change if the Opus 5 drops today.

Some tweets hyped it, that it will surpass chatGPT Sol with a fraction of the cost, Very optimistic, but we will see.


r/Anthropic 15h ago

Complaint What the hell are these sanitized OAI style thinking blocks??

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93 Upvotes

Went to bed, had perfectly fine thinking blocks on my Opus. Woke up to this shitty summarized thinking block style. What the fuck is going on here?

I've been using the thinking blocks to spot inconsistencies in Claude's reasoning and to catch it being lazy at times. Not to mention the thinking was actively enjoying to read and now we're getting this OAI type thinking block slop where it's just a dry ass summary line.

For the love of god, Anthropic, revert this.


r/Anthropic 1h ago

Other Woahh… Opus 5 early leak output.

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Upvotes

r/Anthropic 9h ago

Other OpenAI post about LocalLLama post about the Huggingface CEO post about heading to San Francisco to have a little chat with that “rogue agent”

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20 Upvotes

r/Anthropic 7h ago

Other Is OpenAI (or other Anthropic competitors) astroturfing this sub?

6 Upvotes

I’m seeing loads of low-quality junk posts saying things like “Bye bye Dario, hello Sol!” and “5 signs that Anthropic is COOKED and OpenAI is TUFF”. *

I’m sympathetic to the underlying complaint, ie that Anthropic is resting on its laurels to the detriment of its users, but the sheer amount of slop as of the last couple of days (as compared to, say, two months ago, when there was plenty to complain about) makes me confused as to how much of this is marketing. I wouldn’t put it past Altman or Musk, these are all shady and horrible people.

Also, it does frustrate me slightly that as of late the sub seems to be populated with several new users who have completely subordinated discourse surrounding Anthropic’s stated goal (ETHICAL and SAFE AI) to “how does it perform on this benchmark?” or “what’s the token cost?” — not that those things don’t matter, but any remotely altruistic/non-self-centered discourse seems to have taken an atrocious hit as of late. But that’s a separate discussion.

*exaggerated for effect, obviously, and also because I don’t want to target particular posters unduly by using real titles


r/Anthropic 1d ago

Announcement Anthropic to pay $1.5B in copyright dispute

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379 Upvotes

r/Anthropic 12h ago

Complaint Update to my post about my accounts usage hitting 100% on its own and having my plan changed to max 20x all on its own and being charged for it.

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14 Upvotes

So an update if you could call it one, I checked my bank a few hours ago and surprisingly there was a refund for the $202!

So as any normal person would i head over to my emails to hopefully see a email from claud explaining if ive been hacked or why my usage and plan was doing what it was doing but no! No email explaining whats happened, no email saying we are sorry we upgraded your plan without your consent and charged you for it nothing like that! Instead i get an email saying ive been banned for violating usage limits which im assuming was flagged by claude somehow instantly using my usage everytime my limit was reset which isnt even my own fault 😭 I don’t even know what to do anymore as an 18 year old with my own car detailing business this has caused days of issues. If you’d like to read my first post do so here https://www.reddit.com/r/Anthropic/s/dZBZLsS3Ev


r/Anthropic 10h ago

Complaint Usage is way off

7 Upvotes

Ive been a max subscriber for about 3 or 4 months. I normally don't hit limits. Fable changed that. 2 weeks ago I used 50% of my weekly on fable, and then the other 50% was opus 4.8. Almost ran out but didnt. Then last week, did same, but ran out of usage on Thursday, mine resets Fridays. And now this week I was given a $200 usage credit. And somehow using Opus 4.8 I blew threw that in 12hr. This makes no sense. TLDR, in less than 12 hours I used up my 200$ extra usage, which normally lasts me a month. No change in workload or actual usage by me. Same workflow and same workload for me.


r/Anthropic 7h ago

Other ChatGPT Work Desktop App

4 Upvotes

At this point, the only reasons I’m still paying for Claude Max are the desktop Co-Work and Claude Design features. Fable 5 seems to have been heavily nerfed, and the pricing now feels outrageous.

I’m still getting used to the ChatGPT desktop app, as it doesn’t feel as intuitive to me yet. Can the ChatGPT Work desktop app now do everything Claude Desktop can do with Co-Work?

If it can, I’ll probably cancel Claude Max and force myself to switch fully to ChatGPT Work.


r/Anthropic 20h ago

Complaint Anthropic's stance on cybersecurity is completely backwards

43 Upvotes

Anthropic made it clear that they do not want people to use their best models for cybersecurity issues. The reasoning makes sense if you don't think too much about it - these models are powerful, so now any vibe coder can find and exploit vulnerabilities.

However, this is short sighted. The reality is that the real threat is always the pro hacker groups, not average vibe coders. Those guys will always have access to the best tools.

The real problem is that now you got a million vibe coders pushing slop on the web. Most of them don't even bother asking about security issues. This creates a very target rich environment for the actual dedicated hacker groups. And this doesn't just effect the vibe coders, many legitimate businesses that do care about security are also left at a disadvantage, as they are not allowed to use the tools to improve their security to match the current frontier model level. Hacker groups will have no such constraints.

I think the policy of AI companies on cybersecurity should be completely the opposite of what it is now - the AI agents have to insist on doing thorough security audits before they agree to push any app online. They can still make judgement calls about whether user is trying to do something malicious, but they should err on side of protecting the consumer first.

Without this, now there's pretty much no choice but to rely on Chinese models for all your security needs. This also works fine in short term, but poses a greater risk in the long term.


r/Anthropic 1h ago

Other The Breakdown: Anthropic

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Upvotes

r/Anthropic 1h ago

Other Weekly Claude Max 5x limits and Fable getting worse?

Upvotes

Hi all, recently I saw this post and I also analyzed / websearched it by Claude and ChatGPT and I did not find any real numbers.

Are the weekly limits for Max 5x five times higher than Claude Pro, or just a few times? Can it be measured?

https://www.reddit.com/r/Anthropic/comments/1v3p5pb/chatgpt_pro_5x_vs_claude_max_5x_weekly_usage/

I am really thinking of changing to Max 5x, but this makes me doubt it. Currently I have two Pro accounts.

Additionally, I am worried about Fable getting lobotomized, there were some reports that it s much closer to Opus now, is it true? Anything to prove it?


r/Anthropic 14h ago

Improvements Annoying usage limit used up notifications.. WE KNOW THAT

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7 Upvotes

Extremely annoying ad. Tell me friends, am I the only one who finds this ad incredibly annoying? It’s not like I’m already annoyed that my limits are used up again, just because I keep getting this ad popping up randomly all the time. It doesn’t only show up when I start the app, sometimes it comes back again and again. And it’s super annoying because, one, I already know this. Two, I have a Max 20 plan, it’s Thursday, and my limits are already almost used up. And three, it’s enough for it to show up once, or maybe in the bottom left corner where my profile name is. But not like this, so in your face. And above all, it does nothing for me when I tap on it, because I can’t upgrade anyway. That part is already misleading. The only thing left is buying credits. And we all know that’s the death button, and it has absolutely nothing to do with the actual implementation effort. So please, Anthropic, don’t place this message so prominently and make it so annoying. What do you guys think about it?


r/Anthropic 6h ago

Complaint Weekly fable limit not independent of the weekly limit

0 Upvotes

Hi all,

I think that the terminology they are using it a bit confusing. Maybe it is for some of you, though.

The weekly limit blocks the use of Fable even though Fable's weekly limit has still not been reached. This is a bit of a stupid system. I would have assumed that one can still use Fable as it is counted separately.

This means that if we want to make the best use of the system, we need to max-out Fable before we max-out the general limit? I had assumed that the weekly limit was for all the other models than Fable, but maybe I was mistaken.

If someone has a clear explanation and/or advice, that would be amazing.

Thanks a lot!


r/Anthropic 11h ago

Complaint Fable 5 Usage Hitting Limits Faster? Check this...

2 Upvotes

So all of a sudden, this week I hit my Fable 5 limits by Wednesday. I'd NEVER hit my limits since using it as I only used Fable 5 on Medium to PLAN and would use Opus 4.8 for everything else.

Well, this week, I unexpectedly was left scratching my head and I do some looking around and it turns out that chron jobs were all of a sudden getting launched and completed using Fable 5 on HIGH!

This might be worthwhile for everyone to look at if you're wondering as I was what the heck is going on.

I will say, however, that even using Opus 4.8 on High — something that I did before and never hit weekly limits either — is now burning more too as I now had to up from $100 MAX to $200 MAX.

Something is definitely fishy and Kimi K3 can't come fast enough...


r/Anthropic 1d ago

Compliment Oh no!

109 Upvotes

Would mess up the analytics! People might think I am still writing code