Article URL: https://simonwillison.net/2026/Sep/1/claude-fable-5-1/ Comments URL: https://news.ycombinator.com/item?id=49530472 Points: 41 # Comments: 11…
This is a short WorldPing brief. The full report was published by Hacker News.
Read the full report at Hacker NewsAnthropic says its newest AI models, Fable 5.1 and Mythos 5.1, address criticisms from customers about price, data retention, and overzealous safeguards. The company claims Claude Fable 5.
Brief by WorldPing · Original reporting by The Verge
What's new in Claude Fable 5.1 – https://platform.claude.com/docs/en/models/fable-5-1/whats-n... System Card: https://www-cdn.anthropic.com/0339e6a7c5c7b87f5c07798616dc32... Comments URL: https://news.ycombinator.com/item?
Brief by WorldPing · Original reporting by Hacker News
WorldPingFable 5.1 and its restricted sibling Mythos 5.1 arrive three months after export controls forced Anthropic to pull Fable 5 offline for 18 days…
Brief by WorldPing · Original reporting by Decrypt
Fable 5.1 includes changes meant to reduce token cost and false-positive restrictions from the model's safeguards.
Brief by WorldPing · Original reporting by TechCrunch
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