xAI releases Grok 4.6 with strong benchmark performance, tying GPT-5.6 Sol

xAI released Grok 4.6, scoring 61 on the Artificial Analysis Index, tying GPT-5.6 Sol and trailing Claude Fable 5 by one point. Extended training and SFT/RL refinements. Available via Cursor and Grok Build at $2/$6 per M tokens. Beats Fable 5 on three specific benchmarks. This reinforces xAI's rapid iteration pace in the flagship commercial model space.