What is the difference between Gemma 4 26B A4B and GPT-6 Astra Pro?

Gemma 4 26B A4B is developed by Google AI while GPT-6 Astra Pro is developed by OpenAI. Gemma 4 26B A4B has a 262K token context window vs GPT-6 Astra Pro's 1.1M. You can compare their actual outputs across 6 challenges on Rival to see how they differ in practice.

Which is better, Gemma 4 26B A4B or GPT-6 Astra Pro?

It depends on your use case. Gemma 4 26B A4B and GPT-6 Astra Pro 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 Gemma 4 26B A4B cost compared to GPT-6 Astra Pro?

Gemma 4 26B A4B costs $0.13/M input tokens and GPT-6 Astra Pro costs $10/M input tokens. Gemma 4 26B A4B is $9.87/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 26B A4B and GPT-6 Astra Pro on Rival?

This page shows a side-by-side comparison of Gemma 4 26B A4B 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 26B A4BvsGPT-6 Astra Pro

Gemma 4 26B A4B is cheaper than GPT-6 Astra Pro at $0.13/M vs $10/M input tokens.

Gemma 4 26B A4B and GPT-6 Astra Pro compared across 6 shared prompts
Spec	Gemma 4 26B A4B	GPT-6 Astra Pro
Input price	$0.13/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 26B A4BRunner-up

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

Gemma 4 26B A4B costs 125x less per token.

Slight edge

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Gemma 4 26B A4B

Input

$0.13

77× cheaper

Output

$0.40

125× cheaper

GPT-6 Astra Pro

Input

$10.00

Output

$50.00

Gemma 4 26B A4B is cheaper on both: 77× input, 125× output.

Where to run it

13 hosts, cheapest first

Gemma 4 26B A4B11 hosts

HostInOutContextUptime

Darkbloom$0.04 in$0.22 out131k99.2% up DekaLLMbf16$0.06 in$0.33 out262k99.9% up NextBitbf16$0.09 in$0.30 out262k99.7% up Cloudflare Workers AI$0.10 in$0.30 out256k99.9% up Makora$0.10 in$0.34 out262k96.9% up Novitabf16$0.13 in$0.40 out262k99.4% up

5 more hosts

Parasailbf16$0.13 in$0.40 out262k98.4% up Venicebf16$0.13 in$0.40 out256k98.2% up SiliconFlowfp8$0.14 in$0.40 out262k97.2% up Google Vertex AI$0.15 in$0.60 out262k97.8% up DeepInfrafp8degraded$0.07 in$0.34 out262k99.5% 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

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More comparisons

Cost per 1M tokens

13 hosts, cheapest first

What we learned reading every model

Common questions

What is the difference between Gemma 4 26B A4B and GPT-6 Astra Pro?

Which is better, Gemma 4 26B A4B or GPT-6 Astra Pro?

How much does Gemma 4 26B A4B cost compared to GPT-6 Astra Pro?

How can I compare Gemma 4 26B A4B 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

13 hosts, cheapest first

What we learned reading every model

Common questions

What is the difference between Gemma 4 26B A4B and GPT-6 Astra Pro?

Which is better, Gemma 4 26B A4B or GPT-6 Astra Pro?

How much does Gemma 4 26B A4B cost compared to GPT-6 Astra Pro?

How can I compare Gemma 4 26B A4B and GPT-6 Astra Pro on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages