What is the difference between GPT-6 Astra Pro and GPT OSS 120B?

Both are developed by OpenAI but target different use cases. GPT-6 Astra Pro has a 1.1M token context window vs GPT OSS 120B's 131K. 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 GPT OSS 120B?

It depends on your use case. GPT-6 Astra Pro and GPT OSS 120B 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 GPT OSS 120B?

GPT-6 Astra Pro costs $10/M input tokens and GPT OSS 120B costs $0.18/M input tokens. GPT OSS 120B is $9.82/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 GPT OSS 120B on Rival?

This page shows a side-by-side comparison of GPT-6 Astra Pro and GPT OSS 120B 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 ProvsGPT OSS 120B

GPT OSS 120B is cheaper than GPT-6 Astra Pro at $0.18/M vs $10/M input tokens.

GPT-6 Astra Pro and GPT OSS 120B compared across 6 shared prompts
Spec	GPT-6 Astra Pro	GPT OSS 120B
Input price	$10/M tokens	$0.18/M tokens
Output price	$50/M tokens	$0.8/M tokens
Context window	1.1M tokens	131K tokens
Weights	Closed	Open
Free API (OpenRouter)	No	No
Released	Sep 2026	Aug 2025

Our Verdict

GPT-6 Astra Pro

GPT OSS 120BRunner-up

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

GPT OSS 120B costs 63x 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 OSS 120B

Input

$0.18

56× cheaper

Output

$0.80

63× cheaper

GPT OSS 120B is cheaper on both: 56× input, 63× output.

Where to run it

22 hosts, cheapest first

GPT-6 Astra Pro2 hosts

HostInOutContextUptime

Azure AI Foundry$10.00 in$50.00 out1.1M99.8% up OpenAI$10.00 in$50.00 out1.1M99.8% up

GPT OSS 120B20 hosts

HostInOutContextUptime

AkashMLbf16$0.03 in$0.17 out131k99.7% up CoreWeavefp4$0.03 in$0.17 out131k99.9% up DekaLLMbf16$0.03 in$0.18 out131k99.7% up DeepInfrabf16$0.04 in$0.17 out131k99.7% up Crusoebf16$0.05 in$0.25 out131k99.9% up Novitafp4$0.05 in$0.25 out131k95% up

14 more hosts

Mancerfp8$0.05 in$0.40 out131k99.3% up DigitalOcean$0.06 in$0.42 out128k100% up Google Vertex AI$0.09 in$0.36 out131k98.7% up Basetenfp4$0.10 in$0.50 out128k100% up Parasailfp4$0.10 in$0.75 out131k100% up SambaNova$0.14 in$0.95 out131k91.3% up Amazon Bedrock$0.15 in$0.60 out131k64.8% up Groq$0.15 in$0.60 out131k100% up Nebiusfp4$0.15 in$0.60 out131k99.6% up Phala$0.15 in$0.60 out131k95.6% up SiliconFlowfp8$0.15 in$0.60 out131k97.1% up Together$0.15 in$0.60 out131k93.6% up Mara$0.15 in$0.75 out131k87.1% up Cerebrasfp16$0.35 in$0.75 out131k100% up

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

Research

What we learned reading every model

FAQ

Common questions

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More comparisons

Cost per 1M tokens

22 hosts, cheapest first

What we learned reading every model

Common questions

What is the difference between GPT-6 Astra Pro and GPT OSS 120B?

Which is better, GPT-6 Astra Pro or GPT OSS 120B?

How much does GPT-6 Astra Pro cost compared to GPT OSS 120B?

How can I compare GPT-6 Astra Pro and GPT OSS 120B on Rival?

More comparisons

Against the newest arrivals

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Model pages

Cost per 1M tokens

22 hosts, cheapest first

What we learned reading every model

Common questions

What is the difference between GPT-6 Astra Pro and GPT OSS 120B?

Which is better, GPT-6 Astra Pro or GPT OSS 120B?

How much does GPT-6 Astra Pro cost compared to GPT OSS 120B?

How can I compare GPT-6 Astra Pro and GPT OSS 120B on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages