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T5 (Text-to-Text Transfer Transformer)

by Google

AI Model
Low Confidence

T5 is a transformer-based language model developed by Google Research that reframes all natural language processing (NLP) tasks into a unified text-to-text format. This means both input and output are always text strings, allowing the model to handle tasks like translation, summarization, question answering, and classification using the same architecture. T5 is pre-trained on a large corpus of web-extracted text (C4) and can be fine-tuned for specific downstream tasks. It is designed to be highly scalable and adaptable, with variants ranging from small (60 million parameters) to XXL (11 billion parameters).

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Transparency Score

Weighted across four pillars · updated February 4, 2026

Overall grade
42% weighted
ABCDF
Model
—
Not yet assessed
Infrastructure
—
Not yet assessed
Openness Assessment
36%Limited Openness
3 Open
4 Partial
2 Closed
5 Unknown
Availability
1/5 Open
Documentation
5/6 Open
Access Methods
1/3 Open
Data from EU Open Source AI Index (DOI: 10.5281/zenodo.15386042), licensed under CC-BY 4.0

Capabilities

Text Generation
Translation
Summarization
Question Answering
Classification
Code Generation

Vendor Information

Complete information about the vendor/provider of this AI application

GoogleView all products →
Google LLC(Trading as: Google)
Contact Information
about.google/
support@google.com
+1 650-253-0000
Registered Address
600 Amphitheater Parkway, Mountain View,, Mountain View

EU AI Act Provider Information

Verification Status:
Partially Verified
Google LLC(Trading as: Google)
600 Amphitheater Parkway, Mountain View,, Mountain View
support@google.com+1 650-253-0000
Google Ireland Ltd.
Compliance Documents
CE Marking: Not Applicable
Compliance & Risk

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Added: January 22, 2026
Updated: February 4, 2026

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