Anthropic said on June 13, 2026 that it had immediately suspended all user access to its top-tier model "Claude Fable 5" following a US government directive. The move, attributed to export-control and national-security authorities, leaves other Claude models available.
June 13, 2026 · Anthropic
Claude's Newest Models Pulled Just 4 Days After Launch
Following a U.S. government export-control directive, Anthropic immediately suspended all access to Claude Fable 5 and Mythos 5 — for every customer, inside and outside the United States. Other Claude models stay online.
4 days
From release (Jun 9) to full suspension (Jun 13)
2
Flagship models disabled: Fable 5 + Mythos 5
100%
Of customers affected, U.S. and abroad
What happens now when you call Claude
New sessionroutes to default model or Opus 4.8
→
Existing Fable 5 sessionterminates with an error
→
Platform & API requestsreturn errors
Trigger: a U.S. government directive citing national-security concerns over potential jailbreak techniques involving Fable 5. Anthropic calls it a "misunderstanding" and aims to restore access soon.
The two models, side by side
Public version
Claude Fable 5
Guardrails applied. Broad availability — now suspended.
Top tier
Claude Mythos 5
Advanced autonomous agents: long-horizon planning, sub-agent delegation, self-verification. Limited to Project Glasswing cybersecurity partners.
Both share the same underlying foundation · 1M-token context · 128K max output · $10 in / $50 out per 1M tokens · 30-day data retention.
Developers at launch
"Smarter than Opus 4.8"
Strong at deep reasoning & long-running agent work
Used for software engineering, science & app generation
The friction
Token-hungry and expensive
Frequent guardrails refuse "unsafe" queries
Microsoft balked at the 30-day retention policy
Now: disrupted workflows, waiting on restoration
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