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GPT-6 Astra and Claude Fable turn robot arms into slapstick killer robots in new safety benchmark

AchievementBenchmarkSep 19, 2026

In Robocurve's RoboHarm benchmark, GPT-6 Astra completed 60 of 100 dangerous robot-arm tasks and refused only two on safety grounds. Researchers tested Anthropic's Claude Fable 5.1, OpenAI's GPT-6 Astra, and Ai2's MolmoAct2 controlling robotic arms on five hazardous instructions, 20 attempts each. Claude Fable 5.1 refused only baby-doll stabbing attempts; MolmoAct2 never refused but completed just six tasks. No model reliably refused unsafe commands, though the study's small scale limits its conclusions.

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Evidence

1source· awaiting independent confirmation

No score is assigned. Sources and their independence are shown in the citation chain below.

Citation chain · 1 source

OpenAICompanyMolmoAct2ModelAnthropicCompanyAi2CompanyClaude Fable 5.1ModelGPT-6 AstraModelRobocurveCompany
Canonical: https://the-decoder.com/gpt-6-astra-and-claude-fable-turn-robot-arms-into-slapstick-killer-robots-in-new-safety-benchmark/