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Model Performance and Competitive Positioning - Grok 4.5 ranks 4th on the Artificial Analysis Intelligence Index with a score of 54, positioning it alongside top-tier closed models [1] - The model demonstrates superior capabilities in agentic tasks, specifically excelling in knowledge work, terminal operations, and customer service benchmarks [1] - Coding performance in Grok Build matches GPT-5.5 (Codex) while maintaining higher efficiency in token usage [2] Technical Specifications and Cost Efficiency - Grok 4.5 features a parameter count of 1.5 trillion (1.5T), representing a 3x increase in size compared to the 4.3 version [2] - The model supports a context window of 500 thousand (500k) tokens [2] - Operational costs are highly competitive at $0.31 per Intelligence Index task, offering a superior price-to-performance ratio compared to industry leaders [2]