Rival
Sign Up

GPT-5.1 vs Grok 4.20 Beta

Compare GPT-5.1 by OpenAI against Grok 4.20 Beta by xAI, context windows of 400K vs 2.0M, tested across 51 shared challenges. Updated March 2026.

Which is better, GPT-5.1 or Grok 4.20 Beta?

GPT-5.1 and Grok 4.20 Beta are both competitive models. GPT-5.1 costs $1.25/M input tokens vs $2/M for Grok 4.20 Beta. Context windows: 400K vs 2000K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-5.1 and Grok 4.20 Beta

GPT-5.1 is made by openai while Grok 4.20 Beta is from xai. GPT-5.1 has a 400K token context window compared to Grok 4.20 Beta's 2000K. On pricing, GPT-5.1 costs $1.25/M input tokens vs $2/M for Grok 4.20 Beta.

Our Verdict
Grok 4.20 Beta
Grok 4.20 Beta
GPT-5.1
GPT-5.1Runner-up

No community votes yet. On paper, Grok 4.20 Beta has the edge — newer, bigger context window.

Too close to call
FAQ
Keep going
GPT-5.1 vs Pony AlphaNew provider
GPT-5.1 vs Claude Opus 4New provider
GPT-5.1 vs Gemini 2.5 Pro Preview 06-05New provider

This comparison gets 800+ views/month. Your brand could be here.

Advertise