Grok 4.6 and Grok Build 0.1 are xAI's two current flagship-adjacent models, and they are not competing options — they were built for different jobs and priced accordingly. ........ Grok 4.6, released August 12, 2026, is xAI's general frontier model: 500K context, $2 input and $6 output per million tokens. Grok Build 0.1 is the coding specialist: 256K context, $1 input and $2 output per million tokens, the cheapest model xAI publishes. Grok 4.6 has configurable reasoning effor