xAI Adds Dev Models Override Interface

Screenshots shared on January 24, 2026, by researcher Nima Owji reveal an internal 'Dev Models' section in xAI’s Grok web interface that enables swapping model addresses, rewriting system prompts, and editing developer instructions. TestingCatalog analyzed the leak on January 25, 2026, noting fields for custom model names, addresses and tool-call settings; the interface aligns with xAI's recent enterprise and government-focused controls.