xAI's Grok 4.7 has reached the #1 position on the AA cyber index, according to Elon Musk posting to X late on September 29. The model was released on September 21, 2026, meaning it cleared the top benchmark in under two weeks — a fast turnaround for a cybersecurity-focused leaderboard that tends to move slowly.
The AA (Autonomous Agents) cyber index evaluates AI models on security-relevant reasoning tasks — things like vulnerability analysis, exploit reasoning, and defensive code generation. Topping it signals that Grok 4.7 isn't just competitive on general reasoning benchmarks; it's performing at the frontier in a domain where accuracy and precision carry real-world stakes.
For xAI, this is a meaningful data point in the ongoing effort to position Grok as a serious enterprise and research tool, not just a consumer chatbot. Cybersecurity is one of the highest-value verticals for AI deployment, and leaderboard credibility matters to the organizations making procurement decisions. Whether the ranking translates into broader adoption remains to be seen, but the trajectory since Grok 4's launch earlier this year has been consistently upward.
Sources & reporting notes
The links below identify the material source records used for this report.
- @elonmusk on X (2026-09-30T00:14:13.000Z) — Direct source
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