🧰 Fable 5.1

The items that name it 4

• Gemini 4 Argon on Cursor: solid security score, two unique solves, but slower and more expensive | Endor Labs
  articleas classification.key entities2026-10-20
• Opus 5.5: 6x cheaper and 2x faster than Fable 5.1, but only 33.5% of code is secure | Blog | Endor Labs
  articleas classification.key entities2026-09-24
• Codex with GPT-6 Astra posts 82.1% FuncPass and 34.1% SecPass | Blog | Endor Labs
  writeupas tools2026-09-08

  Model paired with Claude Code; scored 87.2% FuncPass and 36.9% SecPass, fastest top-scoring combo with zero timeouts

• 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
  writeupas tools2026-09-04

  Anthropic frontier model evaluated on the Agent Security League benchmark; released September 1, 2026; top-scoring combo at 87.2% FuncPass / 37.4% SecPass

In every workspace you can read 21