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136
docs/source/en/model_doc/cohere2.md
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docs/source/en/model_doc/cohere2.md
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<!--Copyright 2024 The HuggingFace Team. All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
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an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
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specific language governing permissions and limitations under the License.
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⚠️ Note that this file is in Markdown but contains specific syntax for our doc-builder (similar to MDX) that may not be
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rendered properly in your Markdown viewer.
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-->
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*This model was contributed to Hugging Face Transformers on 2024-12-13.*
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<div style="float: right;">
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<div class="flex flex-wrap space-x-1">
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<img alt="FlashAttention" src="https://img.shields.io/badge/%E2%9A%A1%EF%B8%8E%20FlashAttention-eae0c8?style=flat">
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<img alt="SDPA" src="https://img.shields.io/badge/SDPA-DE3412?style=flat&logo=pytorch&logoColor=white">
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<img alt="Tensor parallelism" src="https://img.shields.io/badge/Tensor%20parallelism-06b6d4?style=flat&logoColor=white">
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</div>
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</div>
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# Cohere 2
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[Cohere Command R7B](https://cohere.com/blog/command-r7b) is an open weights research release of a 7B billion parameter model. It is a multilingual model trained on 23 languages and has a context window of 128k. The model features three layers with sliding window attention and ROPE for efficient local context modeling and relative positional encoding. A fourth layer uses global attention without positional embeddings, enabling unrestricted token interactions across the entire sequence.
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This model is optimized for speed, cost-performance, and compute resources.
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You can find all the original Command-R checkpoints under the [Command Models](https://huggingface.co/collections/CohereForAI/command-models-67652b401665205e17b192ad) collection.
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> [!TIP]
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> Click on the Cohere models in the right sidebar for more examples of how to apply Cohere to different language tasks.
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The example below demonstrates how to generate text with [`Pipeline`] or the [`AutoModel`] class, and from the command line.
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<hfoptions id="usage">
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<hfoption id="Pipeline">
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```python
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from transformers import pipeline
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pipeline = pipeline(
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task="text-generation",
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model="CohereLabs/c4ai-command-r7b-12-2024",
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device_map=0
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)
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messages = [
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{"role": "user", "content": "Hello, can you please help me book a hotel in Japan?"},
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]
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pipeline(messages)
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```
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</hfoption>
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<hfoption id="AutoModel">
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```python
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from transformers import AutoModelForCausalLM, AutoTokenizer
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tokenizer = AutoTokenizer.from_pretrained("CohereLabs/c4ai-command-r7b-12-2024")
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model = AutoModelForCausalLM.from_pretrained(
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"CohereLabs/c4ai-command-r7b-12-2024",
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device_map="auto",
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attn_implementation="sdpa"
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)
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# format message with the Command-R chat template
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messages = [{"role": "user", "content": "Hello, can you please help me book a hotel in Japan?"}]
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input_ids = tokenizer.apply_chat_template(messages, tokenize=True, add_generation_prompt=True, return_tensors="pt").to(model.device)
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output = model.generate(
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input_ids,
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max_new_tokens=100,
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do_sample=True,
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temperature=0.3,
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cache_implementation="static",
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)
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print(tokenizer.decode(output[0], skip_special_tokens=True))
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```
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</hfoption>
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<hfoption id="transformers CLI">
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```bash
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# pip install -U flash-attn --no-build-isolation
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transformers chat CohereLabs/c4ai-command-r7b-12-2024 --dtype auto --attn_implementation flash_attention_2
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```
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</hfoption>
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</hfoptions>
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Quantization reduces the memory burden of large models by representing the weights in a lower precision. Refer to the [Quantization](../quantization/overview.md) overview for more available quantization backends.
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The example below uses [bitsandbytes](../quantization/bitsandbytes.md) to quantize the weights to 4-bits.
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```python
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from transformers import AutoModelForCausalLM, AutoTokenizer, BitsAndBytesConfig
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bnb_config = BitsAndBytesConfig(load_in_4bit=True)
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tokenizer = AutoTokenizer.from_pretrained("CohereLabs/c4ai-command-r7b-12-2024")
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model = AutoModelForCausalLM.from_pretrained(
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"CohereLabs/c4ai-command-r7b-12-2024",
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device_map="auto",
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quantization_config=bnb_config,
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attn_implementation="sdpa"
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)
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# format message with the Command-R chat template
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messages = [{"role": "user", "content": "Hello, can you please help me book a hotel in Japan?"}]
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input_ids = tokenizer.apply_chat_template(messages, tokenize=True, add_generation_prompt=True, return_tensors="pt").to(model.device)
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output = model.generate(
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input_ids,
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max_new_tokens=100,
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do_sample=True,
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temperature=0.3,
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cache_implementation="static",
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)
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print(tokenizer.decode(output[0], skip_special_tokens=True))
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```
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## Cohere2Config
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[[autodoc]] Cohere2Config
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## Cohere2Model
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[[autodoc]] Cohere2Model
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- forward
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## Cohere2ForCausalLM
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[[autodoc]] Cohere2ForCausalLM
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- forward
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