SpaceXAI has launched Grok 4.6, its new flagship AI model designed for long-running agentic tasks, coding, research and visual work. The model is available through Cursor, Grok Build and its API, with pricing starting at $2 per million input tokens. xAI says Grok 4.6 shows stronger self-testing and coding performance than Grok 4.5.

SpaceXAI, the AI company formerly known as xAI, has released Grok 4.6, a new flagship model built around long-running agentic tasks and more ambitious interactive and visual work. The model became available the same day in the Cursor code editor and the company's own Grok Build tool, as well as through its API, with pricing starting at $2 per million input tokens and $6 per million output tokens, according to the company's announcement. Grok 4.6 builds on the previous Grok 4.5 model and extends the company's push into agentic coding and knowledge work.

What is new in Grok 4.6?

xAI describes Grok 4.6 as a model that stays with complex tasks across many steps, whether researching a topic, working across an entire codebase, or turning a broad product idea into a working first version of an application. On longer task sequences, the company says it observed more self-testing and verification behaviour, with the model checking its own work before moving on, along with stronger first attempts on visual and interactive projects compared with Grok 4.5.

The capability gains come from a longer supplemental training run than Grok 4.5 received. xAI used curated, model-generated data for reasoning and technical concepts, alongside an improved optimiser and supervised fine-tuning trajectories regenerated by Grok 4.5 across multiple reasoning efforts, agent harnesses and domains, including STEM, software engineering and general knowledge work, with model-based checks used to filter out problematic traces. The model was then trained on a range of agentic reinforcement learning tasks, including domain-specific environments for kernel optimisation, web development and computer-aided design.