What is the difference between Gemma 4 31B and GPT-6 Astra Pro?

Gemma 4 31B is developed by Google AI while GPT-6 Astra Pro is developed by OpenAI. Gemma 4 31B has a 262K token context window vs GPT-6 Astra Pro's 1.1M. You can compare their actual outputs across 5 challenges on Rival to see how they differ in practice.

Which is better, Gemma 4 31B or GPT-6 Astra Pro?

It depends on your use case. Gemma 4 31B and GPT-6 Astra Pro each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 5 challenges so you can judge which fits your needs best.

How much does Gemma 4 31B cost compared to GPT-6 Astra Pro?

Gemma 4 31B costs $0.14/M input tokens and GPT-6 Astra Pro costs $10/M input tokens. Gemma 4 31B is $9.86/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 Gemma 4 31B and GPT-6 Astra Pro on Rival?

This page shows a side-by-side comparison of Gemma 4 31B 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

Gemma 4 31BvsGPT-6 Astra Pro

Gemma 4 31B is cheaper than GPT-6 Astra Pro at $0.14/M vs $10/M input tokens.

Gemma 4 31B and GPT-6 Astra Pro compared across 5 shared prompts
Spec	Gemma 4 31B	GPT-6 Astra Pro
Input price	$0.14/M tokens	$10/M tokens
Output price	$0.4/M tokens	$50/M tokens
Context window	262K tokens	1.1M tokens
Weights	Open	Closed
Free API (OpenRouter)	Yes (1 provider)	No
Released	Apr 2026	Sep 2026

Our Verdict

GPT-6 Astra Pro

Gemma 4 31BRunner-up

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

Gemma 4 31B costs 125x less per token.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Gemma 4 31B

Input

$0.14

71× cheaper

Output

$0.40

125× cheaper

GPT-6 Astra Pro

Input

$10.00

Output

$50.00

Gemma 4 31B is cheaper on both: 71× input, 125× output.

Where to run it

14 hosts, cheapest first

Gemma 4 31B12 hosts

HostInOutContextUptime

DeepInfrafp4$0.09 in$0.34 out262k99.4% up CoreWeavefp4$0.10 in$0.34 out262k97.7% up Venicebf16$0.12 in$0.36 out256k99.3% up Chutesfp4$0.12 in$0.37 out131k84.1% up Crusoebf16$0.14 in$0.40 out262k96% up Friendli$0.14 in$0.40 out262k99.4% up

6 more hosts

Parasailfp8$0.15 in$0.40 out262k98.4% up SambaNova$0.38 in$1.15 out131k14.3% up Together$0.39 in$0.97 out262k84.2% up ModelRunfp4$0.75 in$1.00 out262k99.8% up SiliconFlowfp8$0.75 in$1.00 out262k57.7% up Novitabf16degraded$0.14 in$0.40 out262k77.1% up

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

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Cost per 1M tokens

14 hosts, cheapest first

What we learned reading every model

Common questions

What is the difference between Gemma 4 31B and GPT-6 Astra Pro?

Which is better, Gemma 4 31B or GPT-6 Astra Pro?

How much does Gemma 4 31B cost compared to GPT-6 Astra Pro?

How can I compare Gemma 4 31B 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

14 hosts, cheapest first

What we learned reading every model

Common questions

What is the difference between Gemma 4 31B and GPT-6 Astra Pro?

Which is better, Gemma 4 31B or GPT-6 Astra Pro?

How much does Gemma 4 31B cost compared to GPT-6 Astra Pro?

How can I compare Gemma 4 31B and GPT-6 Astra Pro on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages