What is the difference between Gemma 4 26B A4B and GPT-5 Pro?

Gemma 4 26B A4B is developed by Google AI while GPT-5 Pro is developed by OpenAI. Gemma 4 26B A4B has a 262K token context window vs GPT-5 Pro's 400K. You can compare their actual outputs across 41 challenges on Rival to see how they differ in practice.

Which is better, Gemma 4 26B A4B or GPT-5 Pro?

It depends on your use case. Gemma 4 26B A4B and GPT-5 Pro each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 41 challenges so you can judge which fits your needs best.

How much does Gemma 4 26B A4B cost compared to GPT-5 Pro?

Gemma 4 26B A4B costs $0.13/M input tokens and GPT-5 Pro costs $15/M input tokens. Gemma 4 26B A4B is $14.87/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-5 Pro on Rival?

This page shows a side-by-side comparison of Gemma 4 26B A4B and GPT-5 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 Apr 2026

Gemma 4 26B A4BvsGPT-5 Pro

Gemma 4 26B A4B is cheaper than GPT-5 Pro at $0.13/M vs $15/M input tokens.

Gemma 4 26B A4B and GPT-5 Pro compared across 41 shared prompts
Spec	Gemma 4 26B A4B	GPT-5 Pro
Input price	$0.13/M tokens	$15/M tokens
Output price	$0.4/M tokens	$120/M tokens
Context window	262K tokens	400K tokens
Weights	Open	Closed
Free API (OpenRouter)	Yes (1 provider)	No
Released	Apr 2026	Oct 2025