415.tech
AI & tech, from the frontlines of Silicon Valley·● Issue 2026-06-09
Most recent edition · Tuesday · June 9, 2026
Editorial polish: Anthropic Fable 5 / Mythos 5

Editorial polish: Anthropic Fable 5 / Mythos 5

{"title": "Anthropic's Fable 5 brings Mythos-class capability to general use at $10/$50 per million tokens", "summary": "Fable 5 is Anthropic's first public Mythos-class model — priced at $10/$50 per million input/output tokens, less than half the cost of Mythos Preview — with Stripe reporting that a 50M-line Ruby codebase migration completed in one day rather than the two months a full team would have needed. The simultaneous Mythos 5 launch — the same underlying model, cybersecurity guardrails removed — deploys through Project Glasswing for US government-aligned cyberdefenders, marking the first time Anthropic has formally split a release into tiered access by safety posture rather than capability or price."}

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