Grok 4.20 is xAI's frontier AI model released March 10, 2026. It features real-time X/Twitter data access, 512K token context, reasoning mode, and less-filtered responses. Available via SuperGrok ($30/month) or API ($3/M input tokens).

How does Grok 4.20 compare to GPT-5.4?

Grok 4.20 excels at real-time information and social media analysis thanks to X/Twitter integration. GPT-5.4 is better at coding, has 1M context (vs 512K), and costs less ($2.50/M vs $3/M). GPT-5.4 is more versatile; Grok is better for current events.

Quick Answer

What Is Grok 4.20? xAI's March 2026 Frontier Model

Published: March 31, 2026

What Is Grok 4.20?

Grok 4.20 is xAI’s frontier model released March 10, 2026. Named with a nod to its “less filtered” personality, it’s the third major frontier model launch of March 2026 (after GPT-5.4 and Gemini 3.1 Pro).

Key Features

Real-time X/Twitter data — unique advantage over GPT and Claude
512K token context — large but smaller than GPT-5.4 (1M) and Gemini (2M)
Reasoning mode — extended thinking for complex problems
Less filtered — more willing to engage with controversial topics
SuperGrok subscription — $30/month for consumer access
API access — $3/M input, $15/M output tokens

When to Use Grok 4.20

Real-time information queries (news, social trends)
X/Twitter data analysis and monitoring
Tasks where other models refuse to engage
Research requiring current social media context

When NOT to Use

Coding tasks (GPT-5.4 and Claude Opus 4.6 are stronger)
Long document analysis (context is only 512K)
Budget-sensitive API use ($3/M is expensive vs GPT-5.4’s $2.50)