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Claude knows about the June 2026 export-control suspension of Fable and Mythos 5 only from this notice, because these events fall after its training-data cutoff.
Claude's knowledge of the June 2026 suspension and July 1 restoration of access comes solely from this notice, since the events postdate its training data. ✦ AI generated
Anthropic (Claude Opus 5 system prompt) · Simon Willison's Weblog · 2026-08-09 · original ↗
These events are after Claude's training-data cutoff, so Claude knows about them only from this notice.
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- ·Claude's knowledge of the suspension comes only from this notice
- ·Events postdate Claude's training-data cutoff
- ·Includes the June 2026 suspension and July 1 restoration of access
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