What is the difference between Imagen 3 Fast and Imagen 4?

Both are developed by Google AI but target different use cases. You can compare their actual outputs across 17 challenges on Rival to see how they differ in practice.

Which is better, Imagen 3 Fast or Imagen 4?

It depends on your use case. Imagen 3 Fast and Imagen 4 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 17 challenges so you can judge which fits your needs best.

How can I compare Imagen 3 Fast and Imagen 4 on Rival?

This page shows a side-by-side comparison of Imagen 3 Fast and Imagen 4 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 May 2025

Imagen 3 FastvsImagen 4

Imagen 4 is the newer model, released after Imagen 3 Fast.

Imagen 3 Fast and Imagen 4 compared across 17 shared prompts
Spec	Imagen 3 Fast	Imagen 4
Released	Feb 2025	May 2025

Our Verdict

Imagen 3 Fast

Imagen 4

Not enough votes to call it. On the specs, nothing separates them.

Too close to call

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Common questions

What is the difference between Imagen 3 Fast and Imagen 4?

Which is better, Imagen 3 Fast or Imagen 4?

How can I compare Imagen 3 Fast and Imagen 4 on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages

What we learned reading every model

Common questions

What is the difference between Imagen 3 Fast and Imagen 4?

Which is better, Imagen 3 Fast or Imagen 4?

How can I compare Imagen 3 Fast and Imagen 4 on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages