Grok 4.1 & 4.20 Model Specification Sheet

Core Specifications

Architecture: Transformer-based large language model with reinforcement learning optimization
Grok 4.1: Built on Grok 4 training, optimized for personality, coherence, and real-world usability
Grok 4.20: Introduces a multi-agent inference system where multiple agents collaborate on responses
Context Handling: High-capacity context windows for extended conversations and large document processing
Tool Use: Native integration with web search, APIs, and external tools for dynamic tasks

Grok 4.1 Improvements: Enhanced creativity, emotional intelligence, and conversational nuance
Preferred in blind tests over earlier Grok versions, with higher user preference and leaderboard rankings
Hallucination Reduction: Noticeably lower rate of incorrect or fabricated responses compared to previous iterations
Grok 4.20 Enhancements: Beta version features up to four cooperating agents that operate simultaneously on queries, improving reasoning depth
Market testing shows emerging strengths in analytical and simulation tasks such as stock-trading simulations

Grok 4.1: Designed for more engaging and emotionally aware interactions
Handles long conversations with stable context retention
Multi-Agent Collaboration in Grok 4.20: Parallel agent setup enables collaborative reasoning for complex problem solving
Responses are synthesized by a lead agent that coordinates the group’s outputs

Integrated search and real-time data retrieval to enhance up-to-date responses
Tool calling for APIs, document retrieval, and automation tasks
Multimodal capabilities including text, code, and interactive external tool execution

Accessible via the Grok platform on web and mobile applications
API access available for enterprise and developer integration
Variants such as “Fast” and reasoning/non-reasoning modes available depending on access tier

Grok 4.20 remains in beta and ongoing refinement is expected
Detailed official benchmarks for Grok 4.20 are emerging but not fully standardized
Context window size and tool support may vary by deployment and subscription tier

Grok 4.1 released as a major upgrade with substantial capability gains
Grok 4.20 beta introduces multi-agent reasoning, a major architectural evolution
Early testing suggests strong performance in complex analytical tasks and reasoning simulations