Claude Fable 5, Mythos 5, and Sonnet 5
Anthropic’s current model table is a useful snapshot of the agentic frontier. It describes Claude Fable 5 as next-generation intelligence for long-running agents, Opus 4.8 for complex agentic coding and enterprise work, and Sonnet 5 as the best speed-intelligence combination.
Deployment signal
The model overview also notes that Claude Mythos 5 and Mythos Preview are offered separately for defensive cybersecurity workflows through Project Glasswing, with invitation-only access.
ASI relevance
The market is segmenting by capability, risk, and workflow. Long-running agents, coding agents, and restricted cybersecurity models are now distinct deployment categories rather than abstract benchmark tiers.
Source trail: Anthropic posted about Fable and Mythos access on X.