Musk’s Grok Bot to Use Rival Models Including Claude Opus 5.5, Midjourney, and Suno

Elon Musk announced that Grok Bot, the AI agent app from SpaceXAI (the AI business Musk has folded into SpaceX), will no longer rely solely on its own models. Instead, the agent will utilize a multi-model backend, selecting the most effective API for each specific task.

Integration of Rival Models

Musk stated that the system will use "the best back end model for any given task," explicitly naming Claude Opus 5.5, Midjourney, and Suno. This shift allows the bot to leverage specialized models for text, images, and music, choosing whatever is "most likely to give you the best outcome." Musk did not specify which tasks would be assigned to which outside model. The move follows reports of users experiencing connectivity issues with Grok on mobile and web services the previous day, though SpaceXAI did not provide an official cause for the outages.

Market Context

Grok Bot, launched in August, operates as an AI agent capable of carrying out several tasks in parallel on its own computer. The integration of rival models comes as the AI agent market becomes increasingly crowded, with competitors like Meta’s Muse (reported to have passed 3 million weekly users) and Instinct. Some early users have deleted personal AI agents due to privacy worries, though some continue to use Grok Bot without connecting it to email accounts. Musk also noted that SpaceXAI will adopt the name SpaceXSI, while Anthropic recently released its cheaper Opus model ahead of a planned stock market listing.