Grok 4.20 Beta vs Grok Code Fast 1
Compare Grok 4.20 Beta and Grok Code Fast 1, both from xAI, context windows of 2.0M vs 256K, tested across 53 shared challenges. Updated April 2026.
Which is better, Grok 4.20 Beta or Grok Code Fast 1?
Grok 4.20 Beta and Grok Code Fast 1 are both competitive models. Grok 4.20 Beta costs $2/M input tokens vs $0.2/M for Grok Code Fast 1. Context windows: 2000K vs 256K tokens. Compare their real outputs side by side below.
Key Differences Between Grok 4.20 Beta and Grok Code Fast 1
Grok 4.20 Beta is made by xai while Grok Code Fast 1 is from xai. Grok 4.20 Beta has a 2000K token context window compared to Grok Code Fast 1's 256K. On pricing, Grok 4.20 Beta costs $2/M input tokens vs $0.2/M for Grok Code Fast 1.
Per 1M tokens
Grok Code Fast 1 is cheaper on both — 10× input, 4.0× output
No community votes yet. On paper, Grok 4.20 Beta has the edge — bigger model tier, newer, bigger context window.
Grok Code Fast 1 is 4.0x cheaper per token — worth considering if cost matters.
Style Comparison
Grok Code Fast 1 uses 6.0x more emoji
