Grok 4.5 Reaches Global Top 5 After Parameter Tripling and $60B Cursor Acquisition

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xAI's Grok 4.5 launched on July 8, 2026, jumping 16 points on the Artificial Analysis Intelligence Index to rank 4th among 168 models worldwide. The model's parameters tripled from roughly 500 billion to 1.5 trillion compared to its predecessor, Grok 4.3. A key driver was xAI's $60 billion acquisition of coding assistant Cursor in June 2026, which gave the company access to trillions of real developer session tokens unavailable to competitors. The model also introduced an asynchronous learning methodology enabling multi-hour agentic training runs in parallel with ongoing updates. Grok 4.5 now ranks first on the Harvey Legal Agent Benchmark and outperforms Claude Opus 4.8 on coding benchmarks, while costing significantly less per task than rival models.

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ProgrammingDEV Community ·

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ProgrammingDEV Community ·

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