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xAI

Grok 4.20 Beta

Frontier

xAI•Released on 2026-03-12

Grok 4.20 Beta introduces a revolutionary 4-agent collaboration system (Grok, Harper, Benjamin, Lucas) that debates responses internally before surfacing answers. Features rapid learning architecture, 2M context window, and significantly reduced hallucinations. Optimized for speed and cost efficiency.

84
Overall Score

Core Specs

2000K
Context Window
131K
Max Output
✓
Reasoning
✗
Open Source
Multimodal Support
textimage

Scenario Scores

Coding
#20 / 3683
Writing
#12 / 3585
Translation
#26 / 3580
Data Analysis
#17 / 3684
Conversation
#7 / 3588
Image Gen
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User Feedback Highlights

Based on community feedback. Hover to see original reviews.

− Benchmark data still pending+ Real-time X/Twitter access+ Fast inference with rapid learning architecture− 4.20 version number may be a marketing gimmick+ Significantly reduced hallucinations− X ecosystem dependency− Beta version - may have stability issues− Smaller developer ecosystem vs OpenAI/Anthropic+ 2M context - industry leading+ 4-agent collaboration for better answers
Sentiment:👍 68%😐 22%👎 10%

Pros & Cons

Pros

  • +4-agent collaboration for better answers
  • +2M context - industry leading
  • +Significantly reduced hallucinations
  • +Fast inference with rapid learning architecture
  • +Real-time X/Twitter access

Cons

  • −Beta version - may have stability issues
  • −X ecosystem dependency
  • −Benchmark data still pending
  • −Smaller developer ecosystem vs OpenAI/Anthropic
  • −4.20 version number may be a marketing gimmick

Reliability

SLA99.5%
Incidents (30d)0
View Status Page →

Pricing

Input (per 1M tokens)$0.25
Output (per 1M tokens)$0.60
Subscription$22/month
Free trial available
Updated on 2026-03-16

Get Started

1Visit the provider's website
2Create an account
3Start using the model

Compare with Others

Grok 4.20 Beta vs GPT-5.4 Pro →Grok 4.20 Beta vs GPT-5.4 →Grok 4.20 Beta vs GPT-5.4 Thinking →

Benchmarks

mmlu90.5%
humanEval92%