What is the difference between GPT-6 Astra Pro and Muse Spark 1.1?

GPT-6 Astra Pro is developed by OpenAI while Muse Spark 1.1 is developed by Meta AI. GPT-6 Astra Pro has a 1.1M token context window vs Muse Spark 1.1's 1.0M. You can compare their actual outputs across 6 challenges on Rival to see how they differ in practice.

Which is better, GPT-6 Astra Pro or Muse Spark 1.1?

It depends on your use case. GPT-6 Astra Pro and Muse Spark 1.1 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 6 challenges so you can judge which fits your needs best.

How much does GPT-6 Astra Pro cost compared to Muse Spark 1.1?

GPT-6 Astra Pro costs $10/M input tokens and Muse Spark 1.1 costs $1.25/M input tokens. Muse Spark 1.1 is $8.75/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 Pro and Muse Spark 1.1 on Rival?

This page shows a side-by-side comparison of GPT-6 Astra Pro and Muse Spark 1.1 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 Astra ProvsMuse Spark 1.1

Muse Spark 1.1 is cheaper than GPT-6 Astra Pro at $1.25/M vs $10/M input tokens.

GPT-6 Astra Pro and Muse Spark 1.1 compared across 6 shared prompts
Spec	GPT-6 Astra Pro	Muse Spark 1.1
Input price	$10/M tokens	$1.25/M tokens
Output price	$50/M tokens	$4.25/M tokens
Context window	1.1M tokens	1.0M tokens
Weights	Closed	Closed
Free API (OpenRouter)	No	No
Released	Sep 2026	Jul 2026