Project AURIONAI Use-Cases Research & Innovation
Amazon
LLM

AlexaTM 20B

Multilingual 20-billion-parameter sequence-to-sequence model pre-trained on denoising and causal language modelling, strong at few-shot summarisation and translation.

AmazonAmazonUSA
Figure from the AlexaTM 20B paper: AlexaTM 20B pre-training objectives.
Levelmodel
ClassLLM
Parametersnot in the notes
Contextnot in the notes
Released2 Aug 2022
Opennessunknown
Runs onnot in the notes
Statusactive

R&D Topics

Text-to-text pretraining and summarisationproduced by

Identity

Developer
Amazon
Family
not in the notes
Released
2 Aug 2022 sourcesannouncement page
Weights published
–
Record checked
12 Oct 2026
Where this comes from
Developer and dates from the research notes. Release date is the vendor's public announcement; weights date is when open weights were published.

Architecture and Size

Architecture
dense transformer
Total parameters
– sources
Active parameters
–
Checkpoint parameters
–
Context length
not in the notes
Input
text
Output
text
Where this comes from
Parameter counts as the developer states them. Where the checkpoint holds a different total, both are shown (register A16).

Openness and Access

Openness
unknown
Licence
not in the notes sources
Access routes
not in the notes
Where this comes from
The licence file governs over registry tags and aggregator labels.

Deployment

Runs on
not in the notes
Footprint
not in the notes
Runtimes
not in the notes
Where this comes from
Deployment tiers and runtimes as named in the notes. Footprint is the notes' figure, not a measurement by AURION.

Indonesia

Indonesian support
not stated
Regional languages
not in the notes
Jakarta hosting
unknown
Languages
not in the notes
Where this comes from
Indonesia fields are carried on every model; unknown is an allowed value.

Benchmark Results

The notes record no benchmark result for this model.

Lineage

The notes record no lineage for this model.

Industry Use Cases

No industry use case links this model.

Sources

  1. arxiv.org/abs/2208.01448 https://arxiv.org/abs/2208.01448
  2. github.com/amazon-science/alexa-teacher-models https://github.com/amazon-science/alexa-teacher-models
  3. jumpstart-cache-prod-us-west-2.s3.us-west-2.amazonaws.com/models_manifest.json https://jumpstart-cache-prod-us-west-2.s3.us-west-2.amazonaws.com/models_manifest.json

To cite this page: Project AURION, AI Use-Cases Research & Innovation, "AlexaTM 20B", https://aurion.semai.id/models/amazon-alexatm-20b/, records of October 2026.