A guidelines array on Chat Completions or Responses API requests sets how Grok handles the nsfw, violence and profanity categories. Grok follows the guidelines as it writes its response.
On May 15, 2026 xAI retired grok-4-1-fast, grok-4-fast, grok-4-0709, grok-code-fast-1, grok-3 and grok-imagine-image-pro. Requests to these slugs redirect to grok-4.3 (or grok-build-0.1 for grok-code-fast-1) and are billed at grok-4.3 rates of $1.25 input and $2.50 output per 1M tokens.
After
grok-4.3 at $1.25 / $2.50 per 1M tokens
Action needed:
Set the model explicitly to grok-4.3 with the reasoning effort you want, or grok-build-0.1 for coding.
