AI Glossary
Encoder-decoder model
Also called sequence-to-sequence model, seq2seq
What does “Encoder-decoder model” mean?
Encoder-decoder model: This design pairs an encoder, which reads and represents the full input, with a decoder, which generates the output while consulting that representation. It was the layout of the original transformer and fits tasks that map one sequence to another.

What is an example of “Encoder-decoder model”?
Translation and summarization are classic uses; Google's T5 is a well-known encoder-decoder model.