<p>SpaceXAI released Grok 4.6 on August 12, 2026 — a post-training upgrade over Grok 4.5, not a larger base model. It ties GPT-5.6 Sol Max at 61 on the Artificial Analysis Intelligence Index, ships 500K context and a new xhigh reasoning level, and holds pricing at $2/$6 per million tokens. The coding benchmarks are where it still loses.</p> <p>The post <a href="https://www.marktechpost.com/2026/08/12/spacexai-releases-grok-4-6/">SpaceXAI Releases Grok 4.6: A 500K-Context Frontier Model Tuned for