This is just a quantized version. Licence conditions are intended to be idential to original huggingface repo.
Original description
MPT-30B
MPT-30B is a decoder-style transformer pretrained from scratch on 1T tokens of English text and code.
This model was trained by MosaicML.
MPT-30B is part of the family of Mosaic Pretrained Transformer (MPT) models, which use a modified transformer architecture optimized for efficient training and inference.
MPT-30B comes with special features that differentiate it from other LLMs, including an 8k token context window (which can be further extended via finetuning; see MPT-7B-StoryWriter), support for context-length extrapolation via ALiBi, and efficient inference + training via FlashAttention. It also has strong coding abilities thanks to its pretraining mix. MPT models can also be served efficiently with both standard HuggingFace pipelines and NVIDIA's FasterTransformer.
The size of MPT-30B was also specifically chosen to make it easy to deploy on a single GPU—either 1xA100-80GB in 16-bit precision or 1xA100-40GB in 8-bit precision.
This model uses the MosaicML LLM codebase, which can be found in the llm-foundry repository. It was trained by MosaicML’s NLP team on the MosaicML platform for LLM pretraining, finetuning, and inference.
How is this model different?
MPT-30B is:
Licensed for the possibility of commercial use (unlike LLaMA).
Trained on a large amount of data (1T tokens like LLaMA vs. 300B for Pythia, 300B for OpenLLaMA, and 800B for StableLM).
Prepared to handle extremely long inputs thanks to ALiBi.
Note: This model requires that trust_remote_code=True be passed to the from_pretrained method.
This is because we use a custom MPT model architecture that is not yet part of the Hugging Face transformers package.
MPT includes options for many training efficiency features such as FlashAttention, ALiBi, QK LayerNorm, and more.
To use the optimized triton implementation of FlashAttention, you can load the model on GPU (cuda:0) with attn_impl='triton' and with bfloat16 precision:
python
1import torch
2import transformers
34name ='mosaicml/mpt-30b'56config = transformers.AutoConfig.from_pretrained(name, trust_remote_code=True)7config.attn_config['attn_impl']='triton'# change this to use triton-based FlashAttention8config.init_device ='cuda:0'# For fast initialization directly on GPU!910model = transformers.AutoModelForCausalLM.from_pretrained(11 name,12 config=config,13 torch_dtype=torch.bfloat16,# Load model weights in bfloat1614 trust_remote_code=True15)
The model was trained initially with a sequence length of 4096 with an additional pretraining stage for sequence length adapation up to 8192. However, ALiBi enables users to increase the maximum sequence length even further during finetuning and/or inference. For example:
python
1import transformers
23name ='mosaicml/mpt-30b'45config = transformers.AutoConfig.from_pretrained(name, trust_remote_code=True)6config.max_seq_len =16384# (input + output) tokens can now be up to 1638478model = transformers.AutoModelForCausalLM.from_pretrained(9 name,10 config=config,11 trust_remote_code=True12)
This model was trained with the MPT-30B tokenizer which is identical to the EleutherAI/gpt-neox-20b tokenizer.
The model can then be used, for example, within a text-generation pipeline.
Note: when running Torch modules in lower precision, it is best practice to use the torch.autocast context manager.
python
1from transformers import pipeline
23with torch.autocast('cuda', dtype=torch.bfloat16):4 inputs = tokenizer('Here is a recipe for vegan banana bread:\n', return_tensors="pt").to('cuda')5 outputs = model.generate(**inputs, max_new_tokens=100)6print(tokenizer.batch_decode(outputs, skip_special_tokens=True))78# or using the HF pipeline9pipe = pipeline('text-generation', model=model, tokenizer=tokenizer, device='cuda:0')10with torch.autocast('cuda', dtype=torch.bfloat16):11print(12 pipe('Here is a recipe for vegan banana bread:\n',13 max_new_tokens=100,14 do_sample=True,15 use_cache=True))
Model Description
The architecture is a modification of a standard decoder-only transformer.
The model has been modified from a standard transformer in the following ways:
Data was formatted using the MosaicML StreamingDataset library to host our data in object storage and efficiently stream it to our compute cluster during training.
StreamingDataset obviates the need to download the whole dataset before starting training, and allows instant resumption of training from any point in the dataset.
Data Mix
The model was trained for 1T tokens on the following data mix:
Data Source
Number of Tokens in Source
Proportion
Effective Number of Tokens
Epochs
mC4 3.1.0 - English (200+ words)
2417.99 B
33.50%
335 B
0.14
c4 - English - SemDedup 80%
100.42 B
29.90%
299 B
2.98
RedPajama - CommonCrawl
878.45 B
8.50%
85 B
0.097
The Stack - Selected Languages
463.78 B
10.00%
100 B
0.22
RedPajama - Wikipedia
4.87 B
4.00%
40 B
8.21
The Stack - Markdown
107.07 B
4.50%
45 B
0.42
Semantic Scholar ORC
48.95 B
3.30%
33 B
0.67
RedPajama - Books
26.02 B
3.00%
30 B
1.15
RedPajama - arXiv
28.10 B
1.90%
19 B
0.68
RedPajama - StackExchange
20.54 B
1.40%
14 B
0.68
Samples for each batch were selected from one of the datasets with the probability specified above. The examples were shuffled within each dataset, and each example was constructed from as many sequences from that dataset as were necessary to fill the sequence length. To build 8k support into MPT-30B efficiently, we first pre-trained on 1T tokens using sequences that were 2k tokens long, and then trained for an additional 50B tokens using sequences that were 8k tokens long.
The data was tokenized using the EleutherAI/gpt-neox-20b tokenizer. This BPE tokenizer has a number of desirable characteristics,
most of which are relevant for tokenizing code:
(1) It was trained on a diverse mix of data that includes code (The Pile)
(2) It applies consistent space delimitation, unlike the GPT2 tokenizer which tokenizes inconsistently depending on the presence of prefix spaces
(3) It contains tokens for repeated space characters, which allows superior compression of text with large amounts of repeated space characters.
The model vocabulary size of 50432 was set to be a multiple of 128 (as in MEGATRON-LM).
Training Configuration
The model was trained in three stages using the MosaicML Platform:
(i) First it was trained on 440 A100-40GBs with a batch size of 1760.
(ii) Then, on 216 A100-40GBs with a batch size of 1728.
(iii) Training was completed on 256 H100-80GBs with a batch size of 512 with 8k context length and 50B tokens.
The model was trained with sharded data parallelism using FSDP and used the LION optimizer.
MPT-30B (Base) is not intended for deployment without finetuning.
It should not be used for human-facing interactions without further guardrails and user consent.
MPT-30B can produce factually incorrect output, and should not be relied on to produce factually accurate information.
MPT-30B was trained on various public datasets.
While great efforts have been taken to clean the pretraining data, it is possible that this model could generate lewd, biased or otherwise offensive outputs.
The license on this model does not constitute legal advice. We are not responsible for the actions of third parties who use this model. Please consult an attorney before using this model for commercial purposes.
Citation
Please cite this model using the following format:
@online{MosaicML2023Introducing,
author = {MosaicML NLP Team},
title = {Introducing MPT-30B: Raising the bar
for open-source foundation models},
year = {2023},
url = {www.mosaicml.com/blog/mpt-30b},
note = {Accessed: 2023-06-22},
urldate = {2023-06-22}
}
