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Sep 3, 2026

OpenAI's Codex wins AI security race at Devcon, DeepSeek finishes second

Ten AI coding agents competed in Austin Griffith's security challenge at Devcon, attempting 12 Solidity challenges originally designed for human developers. Only OpenAI's Codex completed all challenges, while DeepSeek, an open-weight Chinese model, came closest among cheaper alternatives.

Sep 3, 2026·1 source
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Top claims

  • ▪Among other open-weight Chinese models in the September 3, 2026 AI security race, GLM 5.3 captured six flags.
  • ▪Austin Griffith of the Ethereum Foundation and developer collective BuidlGuidl published the system prompts, human interventions, and standings of the September 3, 2026 AI security race, describing the exercise as a transparent single-run evaluation rather than a universal model ranking.
  • ▪In the September 3, 2026 AI security race, OpenAI's Codex running on a medium reasoning setting cleared all 12 flags fastest in 40 minutes and 7 seconds.

Topics

Smart contractsAI agentsAI research & benchmarksAI securityAI coding assistantsOpen source AI ecosystems & communities