SpaceXAI's Grok will hit at least 50 percent HLE Accuracy by December 31, 2026. The move will put SpaceXAI in direct comparison with models already topping the benchmark, after BenchLM tracked Claude Mythos 5 at 64.5 percent and fourteen models were above 50 percent as of July 2026. Grok 4's 50.7 p…