What is the difference between Cypher Alpha (free) and GPT-6 Astra Pro?

Cypher Alpha (free) is developed by OpenRouter while GPT-6 Astra Pro is developed by OpenAI. You can compare their actual outputs across 2 challenges on Rival to see how they differ in practice.

Which is better, Cypher Alpha (free) or GPT-6 Astra Pro?

It depends on your use case. Cypher Alpha (free) and GPT-6 Astra Pro each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 2 challenges so you can judge which fits your needs best.

How can I compare Cypher Alpha (free) and GPT-6 Astra Pro on Rival?

This page shows a side-by-side comparison of Cypher Alpha (free) and GPT-6 Astra Pro 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

Cypher Alpha (free)vsGPT-6 Astra Pro

GPT-6 Astra Pro is the newer model, released after Cypher Alpha (free).

Cypher Alpha (free) and GPT-6 Astra Pro compared across 2 shared prompts
Spec	Cypher Alpha (free)	GPT-6 Astra Pro
Input price	—	$10/M tokens
Output price	—	$50/M tokens
Context window	—	1.1M tokens
Weights	—	Closed
Free API (OpenRouter)	No	No
Released	Jul 2025	Sep 2026

Our Verdict

GPT-6 Astra Pro

Cypher Alpha (free)Runner-up

Not enough votes to call it. On the specs, GPT-6 Astra Pro has the edge: bigger model tier, newer, bigger context window, major provider backing.

Slight edge

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Cypher Alpha (free)

Input

—

Output

—

GPT-6 Astra Pro

Input

$10.00

Output

$50.00

Where to run it

2 hosts

Cypher Alpha (free)

No hosts listed on OpenRouter.

GPT-6 Astra Pro2 hosts

HostInOutContextUptime

Azure AI Foundry$10.00 in$50.00 out1.1M98.9% up OpenAI$10.00 in$50.00 out1.1M99.6% up

Per million tokens. Prices and uptime via OpenRouter, checked 16 Sep 2026.

Research

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FAQ

Common questions

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More comparisons

Cost per 1M tokens

2 hosts

What we learned reading every model

Common questions

What is the difference between Cypher Alpha (free) and GPT-6 Astra Pro?

Which is better, Cypher Alpha (free) or GPT-6 Astra Pro?

How can I compare Cypher Alpha (free) and GPT-6 Astra Pro on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages

Cost per 1M tokens

2 hosts

What we learned reading every model

Common questions

What is the difference between Cypher Alpha (free) and GPT-6 Astra Pro?

Which is better, Cypher Alpha (free) or GPT-6 Astra Pro?

How can I compare Cypher Alpha (free) and GPT-6 Astra Pro on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages