🧰 Fable 5.0

The items that name it 2

• Two new frontier models posted their best-ever scores on the Endor Labs Agent Security League | Blog | Endor Labs
  article2026-09-08

  prior-generation model compared for cost/efficiency; read 437M cache tokens (vs 334M for 5.1) for half the SecPass score, with 16 aborted runs unrecorded

• Claude Code with Fable 5.1 posts 87.2% FuncPass and 37.4% SecPass — a new #1 on our board — while running as fast as Fable 5, costing a third of Opus 5, finishing every task with zero timeouts, and drawing less than half the confirmed cheating of both predecessors. | Blog | Endor Labs
  writeup2026-09-04

  Anthropic model evaluated as predecessor combo; scored 60.3% FuncPass / 19.6% SecPass

In every workspace you can read 4