xAI
xAI launches Grok 4.20 Heavy with 16 specialized agents
xAI has released Grok 4.20 Heavy, featuring 16 specialized agents that pursue a big research project as a team. Users with the SuperGrok Heavy tier now tap into this full power. Once asked, Grok 4.20 Heavy fires up multiple agents to tackle queries from every angle.
In the standard Grok 4.20, you get a core team of four agents that deliver improved responses compared to single-model AIs. They split the work when you ask something complex.
The main coordinator assigns tasks. One agent digs deep into research and checks facts thoroughly. Another handles the numbers, code, and logical steps with precision. The creative one brings new ideas and creates the final draft.
These agents run their processes side by side, share what they find, challenge each other’s findings in a quick debate, and then combine everything into a compound answer. It feels seamless because the collaboration happens behind the scenes during inference time. However, you can see the visual clues on the screen.
The 16 agents in the Heavy version take this process to another level. They explore even more ideas at once through advanced parallel computing. You see better results because more agents mean wider coverage and stronger cross-checks that cut down on mistakes. For example, they could do better multi-step planning, deep analysis, or creative projects that need multi-layer thought processing.
Non-super heavy subscribers stick with the four-agent setup most of the time, which still brings huge gains over older versions with balanced, reasoned outputs. On the other side, the 16-agent Heavy brings a solid edge for demanding users.
The Heavy version maintains peak performance without limits on improving heavy workloads. xAI continues the rollout with plans for wider availability soon. The company is planning to push weekly updates to the Grok 4.20 series as it’s still in beta. It’s expected to get a final release in March after working on user feedback and implementing model improvement.
