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  5. GPT-6 Astra ProvsGPT-6 Sol Pro
Updated Sep 2026

GPT-6 Astra ProvsGPT-6 Sol Pro

GPT-6 Sol Pro is cheaper than GPT-6 Astra Pro at $2/M vs $10/M input tokens.

GPT-6 Astra Pro and GPT-6 Sol Pro compared across 2 shared prompts
SpecGPT-6 Astra ProGPT-6 Sol Pro
Input price$10/M tokens$2/M tokens
Output price$50/M tokens$10/M tokens
Context window1.1M tokens1.1M tokens
WeightsClosedClosed
Free API (OpenRouter)NoNo
ReleasedSep 2026Sep 2026
Our Verdict
GPT-6 Astra Pro
GPT-6 Astra Pro
GPT-6 Sol Pro
GPT-6 Sol ProRunner-up

Not enough votes to call it. On the specs, GPT-6 Astra Pro has the edge: bigger model tier.

GPT-6 Sol Pro costs 5.0x less per token.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

GPT-6 Astra Pro
Input
$10.00
Output
$50.00
GPT-6 Sol Pro
Input
$2.00
5.0× cheaper
Output
$10.00
5.0× cheaper

GPT-6 Sol Pro is cheaper on both: 5.0× input, 5.0× output.

Where to run it

4 hosts

GPT-6 Astra Pro2 hosts
HostInOutContextUptime
Azure AI Foundry$10.00 in·$50.00 out·1.1M·100% upOpenAI$10.00 in·$50.00 out·1.1M·99.4% up
GPT-6 Sol Pro2 hosts
HostInOutContextUptime
Azure AI Foundry$2.00 in·$10.00 out·1.1M·99.9% upOpenAI$2.00 in·$10.00 out·1.1M·100% up

Per million tokens. Prices and uptime via OpenRouter, checked 25 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

Both are developed by OpenAI but target different use cases. GPT-6 Astra Pro has a 1.1M token context window vs GPT-6 Sol Pro's 1.1M. You can compare their actual outputs across 2 challenges on Rival to see how they differ in practice.

It depends on your use case. GPT-6 Astra Pro and GPT-6 Sol 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.

GPT-6 Astra Pro costs $10/M input tokens and GPT-6 Sol Pro costs $2/M input tokens. GPT-6 Sol Pro 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.

This page shows a side-by-side comparison of GPT-6 Astra Pro and GPT-6 Sol 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.

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Model pages

GPT-6 Astra Pro logo
GPT-6 Astra Pro6 outputs, specs and price
GPT-6 Sol Pro logo
GPT-6 Sol Pro20 outputs, specs and price
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