SpaceXAI has released an updated version of its Grok model, Grok 4.6, which boasts a 500,000-word context limit and a new 'xhigh' reasoning level. This upgrade ties Grok 4.6 with GPT-5.6 Sol Max in terms of performance on the Artificial Analysis Intelligence Index. The updated model maintains its pricing at $2 or $6 per million tokens. However, it still lags behind in coding benchmarks. The release of Grok 4.6 may have implications for the development of long-running agents and knowledge work applications.