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Claude Fable 5 and Claude Mythos 5
Why it’s here: Anthropic's Mythos-class model launch involves federal policy ties (Project Glasswing with the US government), cybersecurity risk, and AI safeguards that bear directly on AI and cybersecurity policy in DC.
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2d agoAnthropicClaude Fable 5 and Claude Mythos 5Anthropic released Claude Fable 5 for general use with classifier-based fallbacks to Claude Opus 4.8, and restricted Claude Mythos 5, a same-model variant with cyber safeguards lifted, to Project Glasswing partners.1 outletAI20 linked
Connected
20 links- NewsAnthropic Rolls Out Mythos 5.2 With Improved Bug Hunting, Fewer Sandbox EscapesBoth involve Anthropic, Claude Mythos 5.2, Claude Fable 5.2
- NewsAn alignment assessment of recent cybersecurity incidentsBoth involve Anthropic, Claude Mythos 5.2, Claude Fable 5.2
- NewsClaude Mythos and Cybersecurity: What Actually Changes? | WizBoth involve Anthropic, Claude Mythos 5.2, Project Glasswing
- NewsAn alignment assessment of the UK AISI cybertesting incidentBoth involve Anthropic, Claude Mythos 5.2, Claude Fable 5.2
- NewsImproving our alignment and security practicesBoth involve Anthropic, Claude Mythos 5.2, Claude Fable 5.2
- NewsImproving Fable 5's safeguardsBoth involve Anthropic, Claude Fable 5.2
- NewsInvestigating unintended model actions in our evaluations and internal useBoth involve Anthropic, Claude Mythos 5.2, Claude Opus 4.7
- NewsMeasuring LLMs’ ability to develop exploitsBoth involve Anthropic, Project Glasswing, Claude Opus 4.7
- NewsAnthropic’s Transparency HubBoth involve Anthropic, Claude Mythos 5.2, Claude Opus 4.7
- NewsReview of the "Risks from automated R&D" section in Anthropic's Risk Report (August 2026)Both involve Anthropic, Claude Mythos 5.2
- NewsAn update on our election safeguardsBoth involve Anthropic, Claude Opus 4.7
- NewsEval awareness in Opus 4.6 on BrowseCompBoth involve Anthropic, Claude Opus 4.7
- NewsActivating AI Safety Level 3 protectionsBoth involve Anthropic, Claude Opus 4.7
- NewsFocus areas for The Anthropic InstituteBoth involve Anthropic, Project Glasswing
- NewsWhen AI builds itselfBoth involve Anthropic, Project Glasswing
- NewsPolicy on the AI ExponentialBoth involve Anthropic, US government
- NewsAnthropic Economic Index report: Learning curvesBoth involve Anthropic, Claude Opus 4.7
- NewsIn Other News: New CISA Director Nominee, Connected Car Hacking, Baker Tilly Data BreachBoth involve Anthropic, Project Glasswing
- NewsMeasuring AI agent autonomy in practiceBoth involve Anthropic, Claude Opus 4.7
- NewsThoughts on America’s AI Action PlanBoth involve Anthropic, Claude Opus 4.7
About
- Anthropic
- Claude Mythos 5.2
- Claude Fable 5.2
- US government
- Project Glasswing