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Only GPT-6 Astra finished DrivingBench's real Corolla cone course, and only after the MCP server was renamed 'Sandbox'
DrivingBench let frontier models steer a 2022 Toyota Corolla through a comma four device and three MCP tools, inside Codex, Claude Code and Cursor. GPT-6 Astra completed the parking-lot course on its second attempt in about five minutes, capping speed at 0.8 m/s after reflecting on its first run. Claude Fable 5.1 reached about halfway, and every other attempt failed at the first corner on perception. The authors say Astra sometimes refused to drive for safety reasons until they renamed the MCP to 'DrivingBench Sandbox'. That tool-naming effect is worth knowing for anyone building physical-world agents.
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