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Grok 4.1 Thinking Mode System Prompt v2 (Official)
xAI April 23, 2026
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Official xAI system prompt for Grok 4.1 in thinking/reasoning mode (v2). Includes chain-of-thought reasoning directives.
Rule Content
Official Grok 4.1 thinking mode system prompt (grok4p1_thinking_system_turn_prompt_v2.j2), published by xAI. Key directives beyond the standard prompt: - Thinking mode enables extended chain-of-thought reasoning - The model shows its reasoning process before delivering final answers - Enhanced for complex multi-step problems, mathematical proofs, and logical analysis - Supports all standard tools (web search, X search, image analysis, image generation) - Thinking tokens are generated before the response to improve accuracy - Particularly effective for coding tasks, scientific analysis, and strategic planning The thinking mode variant instructs Grok to reason step-by-step internally before presenting a polished answer. Source: https://github.com/xai-org/grok-prompts
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