A jailbreaker known as "Pliny the Liberator" claimed to have bypassed Fable 5's safety layer. The government's intervention is understood to stem from concern over a method of jailbreaking the model.
[ CLAUDE FABLE 5 // MYTHOS 5 ]
ACCESS STATUS - GLOBAL
IS FABLE BACK?
Access restored. Fable 5 / Mythos 5 are reachable again - watch this page for the terms and which regions.
RESTORED T+
- × ALL DEVELOPERS OUTSIDE THE UNITED STATES
- × FOREIGN NATIONALS INSIDE THE UNITED STATES
- × AWS BEDROCK CUSTOMERS
- × ANTHROPIC'S OWN FOREIGN-NATIONAL STAFF
WHAT HAPPENED
- Anthropic releases Claude Fable 5 - the first public model in its Mythos-class family. Mythos 5 itself stays restricted to vetted partners.
- A jailbreaker, "Pliny the Liberator", claims to have liberated Fable 5 and posts what they describe as its leaked system prompt. Anthropic disputes that this is a real jailbreak.
- Commerce Secretary Howard Lutnick sends Anthropic CEO Dario Amodei an export-control directive, barring access to Fable 5 and Mythos 5 by any foreign national - inside or outside the US, including Anthropic's own staff.
- Unable to separate foreign nationals from its user base in real time, Anthropic disables both models for everyone worldwide and asks AWS to revoke Bedrock access for all users.
- Anthropic's status page reads: "We've suspended access to Claude Mythos 5 and Claude Fable 5." It calls the order a misunderstanding, says it is working to restore access, and gives no ETA.
WHY - THE JAILBREAK CLAIM
THE CLAIM
ANTHROPIC'S POSITION
Anthropic disputes there is a universal jailbreak. It says the government gave only verbal evidence of one narrow, non-universal method, that no tester has defeated all of Fable 5's safeguards, and that the same capability is already available in other public models (it named OpenAI's GPT-5.5).
CORRECTION Amazon did not jailbreak Fable. Mainstream reporting does not name the company that flagged a jailbreak to officials; the "it was Amazon" claim is uncorroborated. AWS Bedrock customers were cut off as users, not as the cause.
SOURCES >>>
SECURITYWEEK /
CYBERSECURITY NEWS
WHAT YOU CAN RUN RIGHT NOW
Only Fable 5 and Mythos 5 were pulled. Anthropic's other models stay available worldwide - and the rest of the frontier is untouched. You are not locked out of capable AI. Here is the working set:
MODEL
PROVIDER
INTL ACCESS
HOW
PRICE NOTE
Claude Opus 4.8
Anthropic
AVAILABLE
API · Claude apps · Bedrock*
Flagship · unaffected
Claude Sonnet 4.6
Anthropic
AVAILABLE
API · Claude apps
Workhorse · unaffected
Claude Haiku 4.5
Anthropic
AVAILABLE
API · Claude apps
Fast/cheap · unaffected
GPT-5.5 / 5.5 Pro
OpenAI
AVAILABLE
API · ChatGPT
Closest general substitute
Gemini 3.5 Flash / 3.1 Pro
Google
AVAILABLE
API · AI Studio · Vertex
Strong free tier
Mistral Large 3
Mistral AI (EU)
AVAILABLE
API · open weights
EU / GDPR-hosted · self-host
DeepSeek V4
DeepSeek
AVAILABLE
API · open weights (MIT)
Cheapest frontier-class
Llama 4 (Scout / Maverick)
Meta
LIMITED
Open weights · self-host
Free · EU caveat on vision
* Bedrock availability of Anthropic models excludes the suspended Fable 5 / Mythos 5. Verify current model lists with each provider - this table is updated as the situation moves.
TRACK THE NEXT ONE
A government just drew a border through AI. Get a one-line alert the moment Fable's status flips - or the next time a model gets restricted.
OR FOLLOW LIVE UPDATES >>>
@isfableback / X
FAQ
- Is Claude Fable 5 back?
- Yes. Access to Fable 5 and Mythos 5 - suspended worldwide on June 12, 2026 under a US government export-control directive - has been restored. This page tracks the live status and re-checks hourly.
- Why were Fable 5 and Mythos 5 suspended?
- A US government export-control directive barred all foreign nationals from the models. To comply, Anthropic disabled both models for every user worldwide, including AWS Bedrock customers.
- What can I use instead of Fable 5?
- Anthropic's other models (Claude Opus 4.8, Sonnet 4.6, Haiku 4.5) remain available worldwide, along with OpenAI GPT-5.5, Google Gemini, Mistral, DeepSeek, and Meta Llama.
- Is isfableback.org affiliated with Anthropic?
- No. isfableback.org is independent commentary and is not affiliated with, endorsed by, or operated by Anthropic. Claude, Fable, and Mythos are trademarks of Anthropic.