SpaceXAI releases Grok 4.6, matching GPT-5.6 Sol on benchmarks

Grok 4.6 scores 61 on the Artificial Analysis Intelligence Index, matching GPT-5.6 Sol, and is available in Cursor and Grok Build with 2x included usage for the first week. It's a 1.5T model focused on long-running agents and knowledge work, cheaper than Opus 5 and Sonnet 5.