SpaceX AI and Cursor released Grok 4.5, an Opus-class model that performs between Claude Opus 4.7 and 4.8 while costing 6 times less than Opus models and 3 times less than GPT-5.5. The model processes tokens at a lower cost per unit while maintaining comparable performance, with availability through Cursor with increased limits and via API. This pricing structure makes it a competitive alternative for developers seeking cheaper inference costs without sacrificing model capability.
SpaceX's xAI launched Grok 4.5, a coding-focused frontier model developed in partnership with Cursor, positioned for cost-efficiency and speed rather than benchmark supremacy. The model costs $2 per million input tokens and $6 per million output tokens, with a 1.5 trillion parameter size that is 3 times larger than its predecessor Grok 4.3. Grok 4.5 becomes available immediately across Grok Build, the Cursor IDE, and various API platforms, competing directly with Anthropic's Opus and OpenAI's GPT models in the coding-agent workflow market.
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