It has great web search, and is one of the best models on the AA-Omniscience Hallucination Rate benchmark (meaning it is really good at admitting it doesn't know something, rather than confidently bullshitting)

In terms of raw intelligence it's also good, Grok 4.6 benchmarks in the same league as Opus and Sol. xAI has lots of issues (not the least of which is being headed by Elon Musk), but their models are solid