The four agents in Grok 4.20 (Grok/Captain, Harper, Benjamin, Lucas) form a native, production multi-agent collaboration system that runs on every sufficiently complex query. This is not a user-facing framework you have to orchestrate (like AutoGen or Swarm) but a baked-in inference-time architecture where four specialized replicas of the underlying ~3T-parameter model (MoE) collaborate in real time.

Agent Roles
– Grok (Captain/Coordinator/Aggregator): Task decomposition, overall strategy, conflict resolution, final synthesis and delivery of the coherent answer.
– **Harper (Research & Facts Expert)**: Real-time search, data gathering (heavy use of X firehose — ~68M English tweets/day for millisecond-level grounding), evidence integration, primary fact-verification.
– **Benjamin (Math/Code/Logic Expert)**: Rigorous step-by-step reasoning, numerical/computational verification, programming, mathematical proofs, stress-testing of strategies and logic chains.
– **Lucas (Creative & Balance Expert)**: Divergent thinking, novel angles/hypotheses, blind-spot detection, writing/UX optimization, creative synthesis, keeping outputs human-relevant and balanced.