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Flan-T5

GoogleOpen WeightsPending Human Review

Flan-T5 is the instruction-tuned T5 family released with research on scaling instruction fine-tuning. It mixes a large collection of prompted NLP tasks and chain-of-thought examples to improve zero-shot and few-shot generalization. Checkpoints from Small to XXL preserve the encoder-decoder design and support text-to-text tasks. It is a significant instruction-specialized family, separate from the original T5 pretraining release.

2022-10-20
Small, Base, Large, XL (3B), XXL (11B)
T5 encoder-decoder Transformer with Flan instruction fine-tuning
Apache-2.0

Specifications

Parameters
Small, Base, Large, XL (3B), XXL (11B)
Architecture
T5 encoder-decoder Transformer with Flan instruction fine-tuning
License
Apache-2.0
Type
text
Modalities
text

Benchmark Scores

Advanced Specifications

Model Family
T5
Finetuned From
t5
API Access
Not Available
Chat Interface
Not Available
Variants
flan-t5-smallflan-t5-baseflan-t5-largeflan-t5-xlflan-t5-xxl
Hardware Support
GPUTPUCPU

Capabilities & Limitations

Capabilities
instruction followingtext-to-text generationreasoningquestion answering
Known Limitations
Academic-task instruction tuning does not establish reliable general conversational behavior.Language coverage and long-context performance are limited by the underlying T5 training.
Notable Use Cases
instruction-tuning researchNLP task adaptationtext-processing applications

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