AI #172: The First Fable
Zvi's AI Roundups · Zvi Mowshowitz · 2026-06-11
Zvi Mowshowitz's weekly AI roundup covers Claude Fable 5's release as a Mythos-class model, benchmark data showing it costs 4-12x more per task than competitors, Anthropic's public call for verifiable AI pause mechanisms amid recursive self-improvement warnings, and US government moves to suppress public AI safety evaluations.
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Extraction
Topics: claude-fable-5ai-benchmarksrecursive-self-improvementai-safety-policyai-regulation
Claims
- Claude Fable 5 achieves similar overall benchmark performance to GPT-5.5 and Composer 2.5 on Agents' Last Exam but costs roughly 4-12x more per completed task at current pricing.
- Anthropic engineers now ship 8x more code per quarter than they did from 2021-2025, with Anthropic warning this trajectory points toward recursive self-improvement.
- The US government directed CAISI to stop publishing public AI model evaluations, drawing widespread criticism from AI safety researchers and industry observers.
- Anthropic publicly called for verifiable, coordinated mechanisms to slow or pause frontier AI development, a position now shared by leadership at Google DeepMind and OpenAI.
- American frontier AI models remain significantly ahead of Chinese competitors in capability, despite widespread contrary belief among policy analysts and strategic thinkers.
Key quotes
Cost per task: → Fable 5: ~$15.70 → GPT-5.5: ~$3.80 → Composer 2.5: ~$1.33. At current pricing, Fable 5 delivers similar performance while costing roughly 4–12× more per completed task.
Today, Anthropic engineers on average ship 8x as much code per quarter as they did from 2021-2025.
We believe it would be good for the world to have the option to slow or temporarily pause frontier AI development to enable societal structures and alignment research to keep up with the advance of the technology.