/Tech1d ago

Anthropic will mandate 30-day data retention for Claude Fable 5, prompting concerns over enterprise compliance

The mandate takes effect in June 2026.

41647329094.5K
Original post
rohit@krishnanrohit#1210inTech

Wait, how will *any* enterprise use Fable or Mythos if this is the case?

12:09 PM · Jun 9, 2026 · 91.3K Views
Sentiment

Some users view Anthropic's 30-day data retention rule for Mythos models as favoring legacy firms or hinting at rapid AI progress, while others denounce it as mass surveillance, regulatory capture, and an unconventional policy.

Pos
55.0%
Neg
45.0%
11 comments with sentiment.
Cluster Engagement
Posts from X
Most Activity
Most Activity
VIEWS2.1K
rohit@krishnanrohit

@tenobrus I wonder if thisis true also for dow. Their current classifier is pretty bad so I can't imagine this is going to remain the way it is today.

Tenobrus@tenobrus

@krishnanrohit they can't.

1dViews 2.1KLikes 9Bookmarks 0
BOOKMARKS2

@krishnanrohit Isn't human break-glass access a common thing? As long as it is monitored and logged, it is as safe a ZDR (because a bad actor might always try to get around it and inspect the network traffic or similar)

1dViews 775Bookmarks 2
LIKES34
rohit@krishnanrohit

I mean - all data is screened - ⁠fable’s guardrails are insanely trigger happy - ⁠only on api - silent degradations - ⁠can’t do any bio, chem or AI work on it

I don't get it.

1dViews 1.4KLikes 34Bookmarks 1
RETWEETS1
Sean@sean_from_earth

@krishnanrohit Anthropic's strategy is still to use safety to justify regulatory capture and then enterprises have no choice but to use them instead of OS models if they want to be Certified Compliant® (obviously)

1dViews 85Likes 2
REPLIES2
rohit@krishnanrohit

@blingdivinity Those are not the same policies, they're opposite. Anthropic says ZDR is not honoured for Fable

1dViews 342Likes 5
Tenobrus@tenobrus

@krishnanrohit they can't.

1dViews 1.6KLikes 16Bookmarks 1
Markus Anderljung@Manderljung

Harder to jailbreak than before: 1,000+ hours of external red-teaming turned up no universal jailbreak. Though the UK AISI "has made progress towards one" in a brief testing window. Maybe AISI will do it again?

1dViews 207Likes 8Bookmarks 1
rohit@krishnanrohit

I mean ... come on!

1dViews 1.7KLikes 8
Joel Jensen@joelmjensen

@krishnanrohit Speaking from an account with ZDR enabled: you don’t

1dViews 338Likes 11
Markus Anderljung@Manderljung

They're setting up trusted-access programs for cyber + bio. Basically, a safeguarded model for everyone (Fable 5) – downgraded to Opus 4.8 if classifiers fire – the full-capability version for vetted users (Mythos 5).

1dViews 246Likes 7
Markus Anderljung@Manderljung

They've also clearly put work into vision, where Claude has historically been poor. Fable 5 rebuilt a web app's source code from screenshots alone, and beat Pokémon FireRed with a minimal vision-only harness.

1dViews 223Likes 6
bling@blingdivinity

@krishnanrohit oh shit ur right

1dViews 129Likes 2
bling@blingdivinity

@krishnanrohit OAI has had the same policy since forever

1dViews 403Likes 1
Tim Kellogg@kellogh

@krishnanrohit @zacharynado i don’t think it’s that big of an issue. Many/most apps have such language to capture more data than they actually need. HIPAA has data deletion requirements, but the window is greater than 30 days

1dViews 89Likes 1
max!@maxsloef

@krishnanrohit surprisingly, this will be a problem for the enterprises, and not anthropic

1dViews 195Likes 4
Lukas Mosser@porestar

@krishnanrohit This also is very strange to change one sided. E.g. if this model comes into cowork it would effectively change the data sharing agreements no?

1dViews 47Likes 1
Tenobrus@tenobrus

@krishnanrohit my guess is ~no, or at very least something custom

1dViews 129Likes 1
kenneth@local0ptimist

@krishnanrohit they won’t for now. we’re not deploying it rn fwiw

1dViews 72Likes 1
Atlas3D@Orwelian84

@tenobrus @krishnanrohit I suspect this is actually similar to the curly effect in political science.

1dViews 20Likes 2
Load more posts