XAI Releases Grok 4.5 Model Trained For Coding And Agents

xAI announced Grok 4.5, which it describes as its first model trained specifically for coding and agents, and said it was trained with Cursor. The xAI release page frames it as a frontier-level model focused on speed and cost efficiency, while xAI researcher Aman Madaan wrote on X that it is the company's “most useful model yet” and “Opus-class in capabilities.” So far, the public case mostly comes from xAI and xAI-adjacent voices describing what the model is supposed to do.