xAI launched Grok 4.6, an agent-focused post-training upgrade on the 4.5 base with a 500,000-token context window. It tied GPT-5.6 Sol on the Artificial Analysis intelligence index while priced at just $2/$6 per million tokens — far below rivals.

The release came after SpaceX acquired xAI in February 2026, with the combined company styling itself SpaceXAI. Grok 4.6 was its first major model launch under the new structure.

Grok 4.6's pitch was value: near-frontier intelligence at budget pricing, undercutting competitors who charged multiples more for similar benchmark scores.