Grok 4.5
SpaceXAI's coding and agentic-work flagship on the new V9 foundation — pitched as Opus-class capability but faster, more token-efficient, and lower cost
Grok 4.5
SpaceXAI • July 2026
Training Data
Pre-training completed May 2026; Cursor workflow data added via fine-tuning
Grok 4.5
July 2026
Parameters
1.5 trillion (self-reported, MoE)
Training Method
MoE on V9 foundation with supplemental Cursor fine-tuning
Context Window
500,000 tokens
Knowledge Cutoff
Not disclosed
Key Features
Agentic Coding Focus • 2× Token Efficiency • 500K Token Context • Cursor-Trained
Capabilities
Coding: Outstanding
Agentic: Outstanding
Cost Efficiency: Excellent
What's New in This Version
First release under the SpaceXAI brand, following the SpaceX–xAI merger, record June IPO, and Cursor acquisition — internal evals place it near Opus 4.7 at a fraction of the price ($2/$6 per MTok), tuned for coding, app-building, research, and routine knowledge work
SpaceXAI's coding and agentic-work flagship on the new V9 foundation — pitched as Opus-class capability but faster, more token-efficient, and lower cost
What's New in This Version
First release under the SpaceXAI brand, following the SpaceX–xAI merger, record June IPO, and Cursor acquisition — internal evals place it near Opus 4.7 at a fraction of the price ($2/$6 per MTok), tuned for coding, app-building, research, and routine knowledge work
Technical Specifications
Key Features
Capabilities
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