What is the difference between GPT-6 Astra and Grok 4.20 Beta?

GPT-6 Astra is developed by OpenAI while Grok 4.20 Beta is developed by xAI. GPT-6 Astra has a 1.1M token context window vs Grok 4.20 Beta's 2.0M. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, GPT-6 Astra or Grok 4.20 Beta?

It depends on your use case. GPT-6 Astra and Grok 4.20 Beta each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does GPT-6 Astra cost compared to Grok 4.20 Beta?

GPT-6 Astra costs $10/M input tokens and Grok 4.20 Beta costs $2/M input tokens. Grok 4.20 Beta is $8.00/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare GPT-6 Astra and Grok 4.20 Beta on Rival?

This page shows a side-by-side comparison of GPT-6 Astra and Grok 4.20 Beta across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

Updated Sep 2026

GPT-6 AstravsGrok 4.20 Beta

Grok 4.20 Beta is cheaper than GPT-6 Astra at $2/M vs $10/M input tokens.

GPT-6 Astra and Grok 4.20 Beta compared across 53 shared prompts
Spec	GPT-6 Astra	Grok 4.20 Beta
Input price	$10/M tokens	$2/M tokens
Output price	$50/M tokens	$6/M tokens
Context window	1.1M tokens	2.0M tokens
Weights	Closed	Closed
Free API (OpenRouter)	No	No
Released	Sep 2026	Mar 2026