Opus 5.5 dominates ValsAI's new Watershed cyber eval, breaking through at ~$17

teortaxesTex · x · 2026-11-11

ValsAI added Watershed to its CyberOffense eval, simulating a realistic AWS production setup (Kubernetes cluster, ECS fleet, real cloud identities/policies). Claude Opus 5.5 tops all three scenarios (77.1% avg) with 55.7/100 on Watershed vs GPT-6 Sol Daybreak's 36/100. Kimi K3 scored 0 on Watershed; GLM 5.3 Flash averaged just 18.3%. The cost curve shows Opus lagging early, then breaking through around $17 of spend — commentator teortaxesTex thinks it could saturate the range before $100.

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