US Trump administration officials concluded high-level talks with Anthropic on June 15–16, 2026 without lifting export controls on Claude Fable 5, citing ongoing concerns over jailbreaks that bypass the model's safety measures.
June 15–16, 2026 · Anthropic ↔ US Government
Talks End Without Lifting the Curb on Claude Fable 5
Senior officials and Anthropic broke off without restoring access to its most advanced model, citing unresolved jailbreaks that could unlock Mythos-level cyber capabilities. The model remains offline for all users.
JUN 9
Release
Fable 5 + Mythos 5 launch
→
JUN 12
Export Curb
Commerce halts access; Anthropic suspends all
→
JUN 15–16
Talks Stall
No restoration; still offline
Spatial Reasoning: a Step Change
Blueprint-Bench 2 score — Fable 5 vs. the lower-tier Opus 4.8
~2.7× higher — part of why early developers called it a "beast."
1M
token context (128K output)
~2 mo
of team work in a day: 50M-line Ruby migration
$10/$50
input / output per 1M tokens
PRAISE
Step change in complex agentic coding & long tasks
Vision: rebuilding code from screenshots
Stronger autonomy & reliability for enterprise
DRAWBACKS
Very high token use — limits hit in minutes
High cost, slow speed on routine work
Oversensitive safeguards refuse benign queries
The Sticking Point
Restoration is offered to consumers — but only once the jailbreak issue is fully resolved.
OFFICIALS
Bypassing Fable 5's guardrails could unlock Mythos-level cyber capabilities.
ANTHROPIC
A narrow, non-universal jailbreak; rivals like GPT-5.5 offer comparable cyber capabilities.
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