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## Overview SpaceXAI released Grok 4.6, its flagship large language model, on August 12, 2026, claiming it can outperform Anthropic's Claude Fable 5 in some areas (SiliconANGLE, August 12). SpaceXAI was known as xAI until its rebrand the previous month, following its acquisition by SpaceX Corp. and subsequent combined-company share listing in June 2026. ## Key Facts - Model name: Grok 4.6 - Release date: August 12, 2026 - Claimed performance: Outperforms Claude Fable 5 in some areas, per SpaceXAI - Benchmark: Scored 61 on the Artificial Analysis Intelligence Index (Artificial Analysis, August 12) - Corporate context: Formerly xAI; rebranded as SpaceXAI following SpaceX acquisition and June 2026 stock listing ## Strategic Significance Grok 4.6 is the latest entrant in the escalating frontier model competition among SpaceXAI, OpenAI (GPT-5.6), Anthropic (Claude Fable 5/Opus 4.7), and others. Independent benchmarking from Artificial Analysis provides a neutral data point (score of 61) against competitors' claims, relevant for enterprise buyers, investors evaluating SpaceX's expanded AI business line, and policymakers tracking the AI capabilities race. This release is part of the broader SpaceXAI-Grok model family tracked separately, but the specific 4.6 release and its competitive benchmarking claims warrant standalone tracking as the story develops. ## Related Context This release should be read alongside the existing SpaceXAI (formerly xAI) – Grok Model Family page, and connects to the ongoing frontier model competition narrative involving Anthropic's Claude Fable 5 and OpenAI's GPT-5.6.