Announcements
The US government ordered Anthropic to suspend Fable 5 and Mythos 5 globally, citing a jailbreak claim Anthropic disputes. If your agent stack pins either model, you need a fallback now.
**The gist** On **June 12, 2026** the US government issued an export-control directive requiring Anthropic to suspend all access to **Fable 5** and **Mythos 5** for every user worldwide, including Anthropic staff; the company complied the same day. All other Anthropic models stay up. The stated trigger is a jailbreak Anthropic calls **narrow and non-universal** — prompting the model to read a codebase and fix its flaws.
**Why it matters** If your agent stack pins **claude-fable-5**, it broke overnight: route to a fallback model and treat model IDs as swappable config, not constants. A deployed commercial model being pulled by **government directive** is a new failure mode — availability risk now includes policy, not just deprecation schedules.
**The gist** On **June 12, 2026** the US government issued an export-control directive requiring Anthropic to suspend all access to **Fable 5** and **Mythos 5** for every user worldwide, including Anthropic staff; the company complied the same day. All other Anthropic models stay up. The stated trigger is a jailbreak Anthropic calls **narrow and non-universal** — prompting the model to read a codebase and fix its flaws. **Why it matters** If your agent stack pins **claude-fable-5**, it broke overnight: route to a fallback model and treat model IDs as swappable config, not constants. A deployed commercial model being pulled by **government directive** is a new failure mode — availability risk now includes policy, not just deprecation schedules. **Watch out** Anthropic says the demonstrated capability is **widely available in other models** and promised more detail within **24 hours**, but there is no restoration timeline and the directive's underlying security rationale hasn't been disclosed.