7 outlets·13 reports
Anthropic backtracks on a policy limiting Claude Fable 5's ability to develop other AI models, after significant backlash from the AI research community (Maxwell Zeff/Wired)
ThinkingNews Desk · how this was written
Anthropic has released Claude Fable 5, a Mythos-class model now available to the public. The model is priced at $10 per million input tokens and $50 per million output tokens. It employs safety classifiers that trigger a fallback to Claude Opus 4.8 in about 5% of sessions and blocks discussion of certain dangerous topics.
Written from all 7 reports below, not from any single one.
How it was reported
- The Verge·Anthropic releases its first Mythos-class model Claude Fable
- TechMeme·Anthropic releases Claude Fable 5, a "safe" Mythos-class model it says can't be used for cyberattacks, to the public, and Claude Mythos 5 to trusted orgs (Wired)
- TechMeme·Anthropic prices both Claude Fable 5 and Mythos 5 at $10 per 1M input and $50 per 1M output tokens, less than half the price of Claude Mythos Preview (David Gewirtz/ZDNET)
- VentureBeat·Anthropic brings Mythos to the masses with Claude Fable 5, its most powerful generally available model ever
- TechMeme·Anthropic says Fable 5 uses conservative safety classifiers that trigger a fallback to Claude Opus 4.8 in ~5% of sessions, in areas like cybersecurity (Anthropic)
- The Next Web·Anthropic releases Claude Fable 5, a Mythos-class model the public can finally use, days before a potential record IPO
- Ars Technica·Anthropic says these topics are too dangerous to let its Fable 5 model talk about
- Engadget·Anthropic's Fable AI brings the capabilities of its unreleased Mythos model to regular users
- The Verge·Microsoft AI head calls out Anthropic for acting like Claude is conscious
- TechMeme·Anthropic says Fable 5 has invisible safeguards that use prompt modification, steering vectors, or PEFT to limit its effectiveness for frontier LLM development (Matthias Bastian/The Decoder)
- TechCrunch·Cybersecurity researchers aren’t happy about the guardrails on Anthropic’s Fable
- TechMeme·Anthropic secretly limiting Claude's usefulness for LLM development strengthens the argument that Anthropic is using AI safety to justify monopolistic behavior (Dean W. Ball/@deanwball)
- TechMeme·Anthropic backtracks on a policy limiting Claude Fable 5's ability to develop other AI models, after significant backlash from the AI research community (Maxwell Zeff/Wired)
Related stories
- Anthropic says Fable 5.1 will cost an estimated 25% less than Fable 5 for typical workloads and up to 45% less for highly agentic work (Zac Hall/9to5Mac)6 outlets
- Anthropic announces Claude Managed Agents, offering developers an agent harness and other infrastructure to help businesses build and deploy AI agents at scale (Maxwell Zeff/Wired)5 outlets
- Anthropic’s new Claude feature is quietly selling you on AI4 outlets
- Analysis: Anthropic may have talked itself into an export ban, as its 2026 official statements and posts used AI risk-related terms 8x more often than OpenAI (Clara Murray/Financial Times)7 outlets