xAI Launches Grok 4.7. It's Bigger, But Late to the AI Frontier Party

In brief

• xAI released Grok 4.7 on Monday, after at least five delays since late July.
• The model scored second to Claude Fable 5.1 on GDPval and AA-Briefcase, and second to GPT-6 Astra on EEBench, an electrical-engineering benchmark.
• Grok 4.7 is live immediately in the Grok app, Cursor, Grok Build, and the xAI API, running on 2.1 trillion parameters with supplemental training on SpaceX engineering data.

Elon Musk’s xAI released Grok 4.7 on Monday afternoon, its best model to date, calling it "a notable improvement over Grok 4.6 at the same price and speed."

The release comes after several apparent delays. Musk had walked the timeline back at least five times since late July: "four weeks out," then "a few weeks," then "3 to 4 weeks," then "10 days" on September 1, then "needs a few more days to cook" on September 11.

xAI says the model spends longer working through hard problems and double-checks its own answers more often than Grok 4.6 did, alongside what the company calls its strongest safety guardrails yet.

Musk followed up on X, calling Grok 4.7 "a strong combination of intelligence, speed & low cost." There's no waitlist this time—it's live now in the Grok app, Cursor, Grok Build, and the xAI API.