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transformers/docs/source/en/model_doc/qwen2_moe.md

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+<!--Copyright 2024 The Qwen Team and The HuggingFace Team. All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
+the License. You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
+an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+specific language governing permissions and limitations under the License.
+
+⚠️ Note that this file is in Markdown but contain specific syntax for our doc-builder (similar to MDX) that may not be
+rendered properly in your Markdown viewer.
+
+-->
+*This model was released on 2024-07-15 and added to Hugging Face Transformers on 2024-03-27.*
+
+<div style="float: right;">
+<img alt="PyTorch" src="https://img.shields.io/badge/PyTorch-DE3412?style=flat&logo=pytorch&logoColor=white">
+<img alt="FlashAttention" src="https://img.shields.io/badge/%E2%9A%A1%EF%B8%8E%20FlashAttention-eae0c8?style=flat">
+<img alt="SDPA" src="https://img.shields.io/badge/SDPA-DE3412?style=flat&logo=pytorch&logoColor=white">
+<img alt="Tensor parallelism" src="https://img.shields.io/badge/Tensor%20parallelism-06b6d4?style=flat&logoColor=white">
+</div>
+
+# Qwen2MoE
+
+[Qwen2MoE](https://huggingface.co/papers/2407.10671) is a Mixture-of-Experts (MoE) variant of [Qwen2](./qwen2), available as a base model and an aligned chat model. It uses SwiGLU activation, group query attention and a mixture of sliding window attention and full attention. The tokenizer can also be adapted to multiple languages and codes.
+
+The MoE architecture uses upcyled models from the dense language models. For example, Qwen1.5-MoE-A2.7B is upcycled from Qwen-1.8B. It has 14.3B parameters but only 2.7B parameters are activated during runtime.
+
+You can find all the original checkpoints in the [Qwen1.5](https://huggingface.co/collections/Qwen/qwen15-65c0a2f577b1ecb76d786524) collection.
+
+> [!TIP]
+> Click on the Qwen2MoE models in the right sidebar for more examples of how to apply Qwen2MoE to different language tasks.
+
+The example below demonstrates how to generate text with [`Pipeline`], [`AutoModel`], and from the command line.
+
+<hfoptions id="usage">
+<hfoption id="Pipeline">
+
+```py
+import torch
+from transformers import pipeline
+
+pipe = pipeline(
+    task="text-generation",
+    model="Qwen/Qwen1.5-MoE-A2.7B",
+    dtype=torch.bfloat16,
+    device_map=0
+)
+
+messages = [
+    {"role": "system", "content": "You are a helpful assistant."},
+    {"role": "user", "content": "Tell me about the Qwen2 model family."},
+]
+outputs = pipe(messages, max_new_tokens=256, do_sample=True, temperature=0.7, top_k=50, top_p=0.95)
+print(outputs[0]["generated_text"][-1]['content'])
+```
+
+</hfoption>
+<hfoption id="AutoModel">
+
+```py
+import torch
+from transformers import AutoModelForCausalLM, AutoTokenizer
+
+model = AutoModelForCausalLM.from_pretrained(
+    "Qwen/Qwen1.5-MoE-A2.7B-Chat",
+    dtype=torch.bfloat16,
+    device_map="auto",
+    attn_implementation="sdpa"
+)
+tokenizer = AutoTokenizer.from_pretrained("Qwen/Qwen1.5-MoE-A2.7B-Chat")
+
+prompt = "Give me a short introduction to large language models."
+messages = [
+    {"role": "system", "content": "You are a helpful assistant."},
+    {"role": "user", "content": prompt}
+]
+text = tokenizer.apply_chat_template(
+    messages,
+    tokenize=False,
+    add_generation_prompt=True
+)
+model_inputs = tokenizer([text], return_tensors="pt").to(model.device)
+
+generated_ids = model.generate(
+    model_inputs.input_ids,
+    cache_implementation="static",
+    max_new_tokens=512,
+    do_sample=True,
+    temperature=0.7,
+    top_k=50,
+    top_p=0.95
+)
+generated_ids = [
+    output_ids[len(input_ids):] for input_ids, output_ids in zip(model_inputs.input_ids, generated_ids)
+]
+
+response = tokenizer.batch_decode(generated_ids, skip_special_tokens=True)[0]
+print(response)
+```
+
+</hfoption>
+<hfoption id="transformers CLI">
+```bash
+transformers chat Qwen/Qwen1.5-MoE-A2.7B-Chat --dtype auto --attn_implementation flash_attention_2
+```
+</hfoption>
+ </hfoptions>
+
+Quantization reduces the memory burden of large models by representing the weights in a lower precision. Refer to the [Quantization](../quantization/overview) overview for more available quantization backends.
+
+The example below uses [bitsandbytes](../quantization/bitsandbytes) to quantize the weights to 8-bits.
+
+```python
+# pip install -U flash-attn --no-build-isolation
+import torch
+from transformers import AutoTokenizer, AutoModelForCausalLM, BitsAndBytesConfig
+
+quantization_config = BitsAndBytesConfig(
+    load_in_8bit=True
+)
+
+tokenizer = AutoTokenizer.from_pretrained("Qwen/Qwen1.5-MoE-A2.7B-Chat")
+model = AutoModelForCausalLM.from_pretrained(
+    "Qwen/Qwen1.5-MoE-A2.7B-Chat",
+    dtype=torch.bfloat16,
+    device_map="auto",
+    quantization_config=quantization_config,
+    attn_implementation="flash_attention_2"
+)
+
+inputs = tokenizer("The Qwen2 model family is", return_tensors="pt").to(model.device)
+outputs = model.generate(**inputs, max_new_tokens=100)
+print(tokenizer.decode(outputs[0], skip_special_tokens=True))
+```
+
+## Qwen2MoeConfig
+
+[[autodoc]] Qwen2MoeConfig
+
+## Qwen2MoeModel
+
+[[autodoc]] Qwen2MoeModel
+    - forward
+
+## Qwen2MoeForCausalLM
+
+[[autodoc]] Qwen2MoeForCausalLM
+    - forward
+
+## Qwen2MoeForSequenceClassification
+
+[[autodoc]] Qwen2MoeForSequenceClassification
+    - forward
+
+## Qwen2MoeForTokenClassification
+
+[[autodoc]] Qwen2MoeForTokenClassification
+    - forward
+
+## Qwen2MoeForQuestionAnswering
+
+[[autodoc]] Qwen2MoeForQuestionAnswering
+    - forward