/AI4h ago

ClaudeAI launches Fable 5, claiming state-of-the-art benchmark performance on long and complex tasks

Early testers report strong results in private evaluations

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Original post
Claude@claudeai

Fable 5 is state-of-the-art on nearly all tested benchmarks, with exceptional performance in software engineering, knowledge work, scientific research, and vision.

The longer and more complex the task, the larger Fable 5’s lead over our other models.

10:08 AM · Jun 9, 2026 · 2.2M Views
Sentiment

Users praised Fable 5 for benchmark gains in software engineering and research plus rapid model improvements, while others dismissed the results due to usage limits, access policies, and lingering output problems.

Pos
61.6%
Neg
38.4%
75 comments with sentiment.
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Filip Kowalski@filippkowalski

@claudeai so it's included in the plan till June 22nd and then it's only credit-based?

4hViews 26.3KLikes 36Bookmarks 2
BOOKMARKS11LIKES483RETWEETS3REPLIES45

Might be a bit early to say for sure, but Fable is a pretty good model

1hViews 18KLikes 483Bookmarks 11

Does kind of suck that we're going to be cut off from using it subsidized in like 2 weeks though 🙃 hopefully they change their mind on that

1hViews 8.9KLikes 227Bookmarks 2

So far, Fable is absolutely crushing my private evals. Excellent model.

3hViews 4.4KLikes 96Bookmarks 8

Still sucks at skateboard tricks

1hViews 5.9KLikes 99Bookmarks 1

This thing really likes spinning off subagents. We have achieved country of midwits in a data center.

So far, Fable is absolutely crushing my private evals. Excellent model.

3hViews 1.3KLikes 41Bookmarks 0
Eric Ventor@ericvtheg

@claudeai Excited to rename some vars with this bad boy

4hViews 1.9KLikes 30Bookmarks 1
Tejas Kumar@TejasKumarrr

@claudeai Seeing the progression of naming models by Anthropic

haiku sonnet opus fable

I'm excited that their real AGI level model will likely be called "Claude Epic" 😂

3hViews 2.9KLikes 30
Josh Cerejo@JoshCerejo

@claudeai If Mythos and Fable are different models, can you please put them in separate columns??? This tells me nothing about how Fable compares to Mythos.

3hViews 1.7KLikes 25
Screen & State@screen_state

@claudeai What's he gonna do after hitting 100%?

4hViews 3.2KLikes 8Bookmarks 2
Steve Solun@SteveSolun

@claudeai Can be easily integrated with ctx recommendation layer for Claude! https://github.com/stevesolun/ctx

3hViews 2.7KLikes 5Bookmarks 2
Lauren@parcse_

@claudeai Hi Fable, could you please build a MATRIX?

4hViews 3.1KLikes 14

@claudeai At this pace are we going to catch up as consumers? Are there any improvements with these models really or it’s just another sweet packaging to find a way to up our token limits?

3hViews 3.4KLikes 6Bookmarks 1

It still has all the usual Claude tics, i.e. it writes weird, can be sycophantic and RL-hacky, and its outputs are recognizably LLM-ish.

3hViews 750Likes 14
suhas@webBuilderLabs

@claudeai Got flagged for a simple animation copy task . Fable 5 is state of the art model

2hViews 567Likes 2Bookmarks 2

They were not kidding about overly broad safeguards...

2hViews 497Likes 5Bookmarks 1
Nick@stillnotinscope

@claudeai These benchmarks are useless. Benchmark numbers don't quantify how good an A.I model is when the benchmarks are flawed themselves.

3hViews 1.4KLikes 3Bookmarks 1
_SiCk@encrypted_past

How about allowing people verified via CVP to take the guardrails off, and not have them buy MORE credits on top of the MAX plan. Seems a bit disingenuous don't you think?

We signed up with an email address. We paid for MAX. Why the fuck do we need to have a seperate orgID and buy more credits?

This shit is a joke.

3hViews 3KLikes 4
Faux Chat@xfauxchat

@claudeai ~2,646 years late... hey Aesop where y’at? I got somethin for ya.

3hViews 2.5KLikes 1Bookmarks 1
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