Grok
Grok 4.20 Beta — xAI
xAI's real-time, no-filter contender with a 4-agent multi-agent collaboration system. The first AI that improves weekly from live deployment.
Released
Feb 17, 2026
Context
256K (2M ext.)
Starting Price
$30/mo (SuperGrok)
Status
Beta
01
Overview
Grok is xAI's flagship AI assistant, built with a uniquely aggressive, unfiltered personality. Unlike other AI models that lead with corporate disclaimers, Grok gives you direct answers — sometimes with a sense of humor. Access it at grok.com or through the X (formerly Twitter) platform.
What makes Grok 4.20 genuinely different is its 4-agent multi-agent collaboration system. When you ask a question, four specialized agents — Grok (coordinator), Harper (syntax verifier), Benjamin (code generator), and Lucas (alternatives explorer) — deliberate in parallel before generating a response. It's like having a team huddle before every answer.
It's also the first major AI model with a rapid learning architecture — it improves weekly from real-world deployment feedback, meaning the model you use today is measurably better than the one from two weeks ago.
02
Key Capabilities
4-Agent Multi-Agent System
Four specialized agents collaborate on every response
Real-Time X/Twitter Data
Native access to live public posts and trends
DeepSearch
Extended research mode scanning multiple web and X sources with citations
Think Mode
Step-by-step reasoning chain displayed before the final answer
Rapid Learning
Weekly model improvements from real-world deployment feedback
Financial Forecasting
Only profitable model on Alpha Arena Season 1.5 stock-trading competition
Medical Document Analysis
Upload and analyze medical documents via photo
100% on AIME
Perfect score on mathematics benchmark
03
Pricing
| Tier | Price | Details |
|---|---|---|
| Free | $0 | 10 prompts / 2 hours. No image generation. |
| SuperGrok | $30/mo | 100 default, 30 Think, 30 DeepSearch requests / 2 hrs. No X subscription needed. |
| X Premium+ | $40/mo | Highest usage caps + early access to new features. Includes X social features. |
| SuperGrok Heavy | $300/mo | Business/research tier. Largest quotas, earliest model access. |
| API (Grok 4.1) | $0.20 / $0.50 per 1M tokens | Input / output pricing. Available now. |
| API (Grok 4.20) | Coming soon | Early access via request form only. |
04
Best Use Cases
Real-time news and social media analysis
Financial forecasting and market analysis
STEM reasoning and academic research
Complex multi-perspective problem analysis
Tasks benefiting from live X/Twitter data
Getting unfiltered, direct answers without corporate hedging
05
Pro Prompts
Real-time Analysis
Give me the unvarnished latest on [current event]. Skip the caveats; I want signal, not noise.Financial Forecasting
Analyze the current market sentiment around [stock/sector] using real-time X data. Identify contrarian signals most analysts are missing.Research Deep Dive
Use DeepSearch to compile everything published in the last 48 hours about [topic]. Rank sources by credibility and highlight conflicting claims.Multi-Agent Debate
I need you to stress-test this business plan: [paste plan]. Have your agents argue both for and against each assumption.06
Limitations
Multi-agent system adds 13-14 seconds of first-token latency
2M context window is distributed across all 4 agents, potentially constraining long conversations
Image understanding and generation remain the acknowledged weakest area
Not ideal as a primary development assistant — lacks extensible APIs and structured tool chains
Long-context document processing can be unreliable (ignores parts of documents, misidentifies graphs)
Image generation restricted to paid users only
Still in beta — not the default model selection
07
Multimodal Capabilities
Input
- Text
- Images
- Video frames
Output
- Text
- Image generation (paid only, via Grok Imagine)
Medical document analysis via photo upload
Can process circuit diagrams, design briefs, and visual inputs alongside text
08
Recent Updates
Mar 3, 2026
Beta 2 update — better instruction following, reduced hallucinations, LaTeX rendering, fixed multi-image display
Feb 17, 2026
Grok 4.20 Beta launched across all platforms
Milestone
Hallucinations reduced 65% compared to Grok 4
Milestone
SpaceX acquisition of xAI completed