Plate IX. The Ascent, 2025–2026
Access to frontier models restricted, then restored
A US government letter bars non-US nationals from Mythos 5 and Fable 5; Anthropic suspends access, and restrictions are lifted on 30 June.
Note on the date: Verify against primary sources.
Date confidence: medium
Sources
- Claude Mythos, Wikipedia secondary
- 2026 in artificial intelligence, Wikipedia secondary