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Claude Fable 5.1 and Claude Mythos 5.1

anthropic.com

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Re: Claude Fable 5.1 and Claude Mythos 5.1

#971

Post by mannanj »

mannanj wrote: post #132
_islo wrote: post #99

I’m really excited to try this out. Fable and Opus 5 constantly wow me when working together. Unfortunately, I’m a little burned because of technical issues. Anthropic accidentally over-billed my account, and when I reached out to the support bot, it downgraded my account to a Free account. It’s been impossible to get it resolved and I have almost $200 held hostage. I don’t want to do a charge back. I’m one of the ma…

you aren't the only one with this issue. many other people I've heard had a similar issue with anthropic billing. I also had a weird edge case behavior around billing where it blocked my usage due to an unpaid bill but then also wanted me to pay for that blocked unavailable usage when I would reinstate my account. I am disappointed in how anthropic handles billing, and is using AI sloppily for customer service around…

and after posting this, and recently restarting my anthropic subscription: - I see 2 billing placeholders on my bank account - 1 subscription actually went through - my bank flagged anthropic's subscription initially as suspicious and I needed to verify it

Is this normal for anyone else? hasn't happened with my codex subscription.

Re: Claude Fable 5.1 and Claude Mythos 5.1

#974

Post by reaperducer »

mkl wrote: post #681
reaperducer wrote: post #604

Earlier quoted context omitted.

A pelican is a bird, not a person. The knees bend the other way.

I get what you mean, but those are the ankles. The knees are higher up and bend the same way as a person's. https://en.wikipedia.org/wiki/Bird_feet_and_legs

A pelican wouldn't/couldn't pedal with its ankles. It doesn't make any more physiological sense than a human doing that.

Re: Claude Fable 5.1 and Claude Mythos 5.1

#975

Post by zmmmmm »

kilroy123 wrote: post #651
madrox wrote: post #405

I am finding that I am now less interested in better models than I am in token budgets. My issue with Anthropic models now is that I don't feel like I can rely on them as a daily driver because they'll dry up before my quota resets. I am becoming dependent on AI to make a living, and I need predictable spend on it. If I know I can't use a model regularly all month, my enthusiasm is limited. I urge Anthropic to get be…

I literally only make it halfway through the week until my weekly usage runs out. This is using only Opus, no fable, and I'm on the max x20 plan. It's become ridiculous.

I'm curious what your methodology is that results in that? Are you running multiple teams of agents all adversarially reviewing each others code? Lots of different projects in parallel?

I've only rarely maxed things out and then it's t through doing extreme things.

Re: Claude Fable 5.1 and Claude Mythos 5.1

#976

Post by zmmmmm »

rcr-anti wrote: post #232

"Distillation is a safety risk, since the distilled capabilities can subsequently be released without adequate safeguards." Can't believe they haven't at least figured out better messaging. If we take them at their word, it's hard not to read it as a messiah complex, that they think they're the only ones capable or worthy of making these decisions. I don't believe them, but I wouldn't be surprised if the articulated…

It definitely leaves a bad taste because it is completely transparent their concern is not security here and that means they are lying / misrepresenting this to our faces - which then raises the question of whether you can trust them on other things.

Would you let someone who lies to your face write code for your sensitive internal business systems?

Re: Claude Fable 5.1 and Claude Mythos 5.1

#977

Post by heurist »

knollimar wrote: post #970
heurist wrote: post #592

Earlier quoted context omitted.

I downgraded from the 20x today after learning that 20x only applies to 5 hour usage. I have barely used Claude/Claude Code in the last month and am considering downgrading further, even after this update.

Wait the 20x doesnt multiply the weekly?

No, only 2x-ish weekly. 20x 5 hour limit.

Re: Claude Fable 5.1 and Claude Mythos 5.1

#978

Post by swalsh »

skor wrote: post #867
swalsh wrote: post #243

I've recently been running these agent sessions on more and more long running tasks because these latest models can do a REALLY good job on big chunks of work, and i've been watching them way less. It's starting to occur to me the importance of alignment is a today problem, it's not a tomorrow problem. In the past I watched and saw everything the model did, not a lot got past me. Today it does A TON of work while i'm…

what do you do while agents work?

Meetings, research, look over work done etc.

Re: Claude Fable 5.1 and Claude Mythos 5.1

#979

Post by surrealize »

ashkankiani wrote: post #895
felixrieseberg wrote: post #69

(I work at Anthropic) Beyond all the benchmarks, I think Fable 5.1 is a big improvement in writing style. It sounds a lot less stereotypically like other Claude models, has (imho) a much more natural style, and responds to my style instructions more reliably. More work to be done (and we will!) but reading better prose makes me so much happier. Another point I expect not to get much attention until it all happens at…

I canceled my Claude subscription, though I did get some utility out of it, because of how much steering was required to use it on complex projects. A big reason being that anyone who is using Fable seriously will run out of usage limits very quickly, and so will lean on the "Fable for review + design discussion, Opus 5 agents for implementation" paradigm. But an incredibly annoying UX problem is that the resulting r…

I gave a standing directive to my coordinator to process subagent transcripts (with a simple Claude-written script that reads the transcript .jsonl) and save the result. I also follow along on the issue tracker; that really helps me understand WTH they're talking about, and the subagents are also directed to post their shipped notes there.

Re: Claude Fable 5.1 and Claude Mythos 5.1

#980

Post by internet101010 »

moffkalast wrote: post #273
unshavedyak wrote: post #236

Earlier quoted context omitted.

And word on Opus 5.1 for writing style? I am on the edge of switching to OpenAI due to this horrid writing style. If Fable is better, great - but i can't even use that at work.

I'd like to know too, I mean GPTs are in their own class of cringe, but Opus is by far the worst of all Anthropic's models in terms of style, Fable 5.0 was already leagues better.

I used to think that until about an hour ago. I am redoing my homelab and asked four agents in Buzz (5.6-sol, opus-5, fable-5.1, glm-5.3-flash) to use references from Hackers (1995) to answer two questions:

1. What should the terraform repo name be?

2. What should the avatar image be?

Obviously all four said "gibson" for question #1. But for #2 is where things got interesting. glm-5.3-flash and gpt-5.6-sol both suggested the guy standing in the hallway with the skateboard in the gibson. fable-5.1 suggested the cookie monster "need more cookies" screen that shows up toward the end.

But Opus 5? I'm paraphrasing but basically "run this series of ffmpeg commands to get the exact frame at the beginning of the movie when the shot of New York fades to the shot of the Gibson. You have to catch it mid-frame. It explains your project perfectly. The skateboard thing is cliche and the cookie monster recommendation suggests you getting locked out of your own network, not the best look." And it was actually a decent idea. Funny that it also just assumed I had a copy of the movie on hand.

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