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Public story · 2026-03-21 · source-backed
xAI released Grok 4.20 Multi-Agent Beta with four specialized sub-agents — Grok (coordinator), Harper (real-time X research), Benjamin (logic/coding), Lucas (creative/contrarian) — running in parallel on every query. Cross-agent verification drops hallucination from ~12% to ~4.2%. The 2M token context window exceeds GPT-5.4 (128K) and Claude Opus 4.6 (200K). A "Heavy" mode scales to 16 agents. The multi-agent-as-product architecture is worth watching.
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GPT competes with Grok / Shared entities / Shared topic / Earlier coverage
Linked by a graph relationship (GPT competes with Grok); both cover Benjamin, Grok, Harper, Lucas; overlapping topics (agent, architecture, benjamin, beta, context).
Critique uses GPT / Shared entities / Shared topic / What happened next
Linked by a graph relationship (Critique uses GPT); both cover Claude Opus, GPT, Multi; overlapping topics (agent, claude).
Cursor uses Grok / Shared entities / Shared topic / What happened next
Linked by a graph relationship (Cursor uses Grok); both cover GPT, Grok; overlapping topics (agent, coding, gpt-5, grok).
Linked by a graph relationship (Cursor uses Grok); both cover Claude Opus, GPT; overlapping topics (agent, claude, coding, gpt-5).
Linked by a graph relationship (Cursor uses Grok); both cover GPT, Grok; overlapping topics (agent, claude, coding).
Cursor uses Grok / Shared entities / Shared topic / What happened next / Tension
Linked by a graph relationship (Cursor uses Grok); both cover GPT, Grok; overlapping topics (gpt-5, grok).
GPT competes with Grok / Shared entities / Shared topic / Earlier coverage
Linked by a graph relationship (GPT competes with Grok); both cover Claude Opus, GPT, Multi; overlapping topics (claude, coding).
Cursor uses Grok / Shared entities / Shared topic / Earlier coverage
Linked by a graph relationship (Cursor uses Grok); both cover GPT, Multi; overlapping topics (agent, architecture, claude).