What is the difference between Andromeda Alpha and GPT-6 Astra?

Andromeda Alpha is developed by OpenRouter while GPT-6 Astra is developed by OpenAI. Andromeda Alpha has a 128K token context window vs GPT-6 Astra's 1.1M. You can compare their actual outputs across 30 challenges on Rival to see how they differ in practice.

Which is better, Andromeda Alpha or GPT-6 Astra?

It depends on your use case. Andromeda Alpha and GPT-6 Astra each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 30 challenges so you can judge which fits your needs best.

How much does Andromeda Alpha cost compared to GPT-6 Astra?

Andromeda Alpha costs $0/M input tokens and GPT-6 Astra costs $10/M input tokens. Andromeda Alpha is $10.00/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 Andromeda Alpha and GPT-6 Astra on Rival?

This page shows a side-by-side comparison of Andromeda Alpha and GPT-6 Astra 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

Andromeda AlphavsGPT-6 Astra

Andromeda Alpha is cheaper than GPT-6 Astra at $0/M vs $10/M input tokens.

Andromeda Alpha and GPT-6 Astra compared across 30 shared prompts
Spec	Andromeda Alpha	GPT-6 Astra
Input price	Free	$10/M tokens
Output price	Free	$50/M tokens
Context window	128K tokens	1.1M tokens
Weights	—	Closed
Free API (OpenRouter)	No	No
Released	Oct 2025	Sep 2026