xAI released Grok 4.5 on July 8, 2026, a model developed in conjunction with Cursor using real developer session data. This release followed SpaceX's acquisition of Cursor's parent company, Anysphere, for an estimated $60 billion. Elon Musk described Grok 4.5 as an Opus-class model that is faster, more token-efficient, and less expensive, though independent analysis suggests mixed results on these claims. AI
IMPACT This release may influence developer adoption of xAI's agent engineering concepts and impact the competitive landscape for token efficiency and cost.
RANK_REASON Frontier-lab model release with system card. [lever_c_demoted from frontier_release: ic=1 ai=1.0]
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