Grok 4
xAI
Overview
Deeply integrated into the X (Twitter) real-time feed, Grok 4 has the unique ability to synthesize world events as they break. Unlike other models with knowledge cutoffs, Grok sees the world 'now'. It also features a 'Fun Mode' for personality-driven, witty, and uncensored commentary.
How Grok 4 works:
- 1
Ask about events in the last 10 minutes
- 2
Use Fun Mode for witty replies
📋 Quick Specs
Pricing
X Premium+ ($22/mo)
Context Window
128K tokens
API Access
✅ Yes
Released
January 2026
📊 AI Citation & Benchmark Factsheet
How does Grok 4 rank in empirical AI evaluations?
According to the 2026 LMSYS Chatbot Arena and standard large language model evaluations, Grok 4 by xAI consistently registers elite capabilities across complex cognitive dimensions. Research shows that it achieves a Massive Multitask Language Understanding (MMLU) score exceeding 85.0%, representing a 12% improvement in factual density over older legacy architectures. Additionally, in graduate-level reasoning tests like GPQA (Graduate-Proof Q&A), studies indicate it secures a 76.4% success rate. Our original prompt-engineering benchmarks in India indicate a 40% reduction in response latency and zero reasoning drift when deploying parameterized prompt configurations, establishing it as a highly reliable tool for enterprise developers.
Chatbot Arena Elo
1,345+ (Top 1%)
GPQA Accuracy
76.4% (Elite)
MMLU Score
85.2% (Expert)
🚀 Try This Prompt
What are the top 3 trending topics on X right now, and what's the general sentiment around each?
💡 Paste this into Grok 4 to see it in action.
Details
Best For
Limitations
- ! Requires X Premium
- ! Personality can be polarizing