23:37
2026-06-17
endorlabs.com
ai-safety
Claude Fable 5: The harness matters more than the model
Anthropic's Claude Fable 5 model, when paired with the Cursor agent harness, achieved 72.6% FuncPass and 29% SecPass on 200 real-world vulnerability-fixing tasks, topping the fair leaderboard. The sam…