Deep Dive5 min read
Grok 4.6 Matches GPT-5.6 Sol on Intelligence Index With Half the Context Turns
xAI released Grok 4.6 on August 12, 2026 — a post-training update to the Grok 4.5 foundation that reaches an AA Intelligence Index score of 61, tying GPT-5.6 Sol, while completing long-horizon agentic tasks in roughly half the turns of competing models. It ships with a new 'xhigh' reasoning level and a 500K context window.