[DOCS] Generative Model Preparation (#27878)

Creating an article about preparation of generative models.

---------

Signed-off-by: sgolebiewski-intel <sebastianx.golebiewski@intel.com>

docs/articles_en/learn-openvino/llm_inference_guide.rst

@@ -9,6 +9,7 @@ Generative AI workflow
    :maxdepth: 1
    :hidden:
 
+   Generative Model Preparation <llm_inference_guide/genai-model-preparation>
    Inference with OpenVINO GenAI <llm_inference_guide/genai-guide>
    Inference with Optimum Intel <llm_inference_guide/llm-inference-hf>
    Generative AI with Base OpenVINO (not recommended) <llm_inference_guide/llm-inference-native-ov>

docs/articles_en/learn-openvino/llm_inference_guide/genai-model-preparation.rst

@@ -0,0 +1,159 @@
+Generative Model Preparation
+===============================================================================
+
+.. meta::
+   :description: Learn how to use Hugging Face Hub and Optimum Intel APIs to
+                 prepare generative models for inference.
+
+
+
+Since generative AI models tend to be big and resource-heavy, it is advisable to store them
+locally and optimize for efficient inference. This article will show how to prepare
+LLM models for inference with OpenVINO by:
+
+* `Downloading Models from Hugging Face <#download-generative-models-from-hugging-face-hub>`__
+* `Downloading Models from Model Scope <#download-generative-models-from-model-scope>`__
+* `Converting and Optimizing Generative Models <#convert-and-optimize-generative-models>`__
+
+
+
+Download Generative Models From Hugging Face Hub
+###############################################################################
+
+Pre-converted and pre-optimized models are available in the `OpenVINO Toolkit <https://huggingface.co/OpenVINO>`__
+organization, under the `model section <https://huggingface.co/OpenVINO#models>`__, or under
+different model collections:
+
+* `LLM: <https://huggingface.co/collections/OpenVINO/llm-6687aaa2abca3bbcec71a9bd>`__
+* `Speech-to-Text <https://huggingface.co/collections/OpenVINO/speech-to-text-672321d5c070537a178a8aeb>`__
+* `Speculative Decoding Draft Models <https://huggingface.co/collections/OpenVINO/speculative-decoding-draft-models-673f5d944d58b29ba6e94161>`__
+
+You can also use the **huggingface_hub** package to download models:
+
+.. code-block:: console
+
+   pip install huggingface_hub
+   huggingface-cli download "OpenVINO/phi-2-fp16-ov" --local-dir model_path
+
+
+The models can be used in OpenVINO immediately after download. No dependencies
+are required except **huggingface_hub**.
+
+
+Download Generative Models From Model Scope
+###############################################################################
+
+To download models from `Model Scope <https://www.modelscope.cn/home>`__,
+use the **modelscope** package:
+
+.. code-block:: console
+
+   pip install modelscope
+   modelscope download --model "Qwen/Qwen2-7b" --local_dir model_path
+
+Models downloaded via Model Scope are available in Pytorch format only and they must
+be :doc:`converted to OpenVINO IR <../../openvino-workflow/model-preparation/convert-model-to-ir>`
+before inference.
+
+Convert and Optimize Generative Models
+###############################################################################
+
+OpenVINO works best with models in the OpenVINO IR format, both in full precision and quantized.
+If your selected model has not been pre-optimized, you can easily do it yourself, using a single
+**optimum-cli** command. For that, make sure optimum-intel is installed on your system:
+
+.. code-block:: console
+
+   pip install optimum-intel[openvino]
+
+
+While optimizing models, you can decide to keep the original precision or select one that is lower.
+
+.. tab-set::
+
+   .. tab-item:: Keeping full model precision
+      :sync: full-precision
+
+      .. code-block:: console
+
+         optimum-cli export openvino --model <model_id> --weight-format fp16 <exported_model_name>
+
+      Examples:
+
+      .. tab-set::
+
+         .. tab-item:: LLM (text generation)
+            :sync: llm-text-gen
+
+            .. code-block:: console
+
+               optimum-cli export openvino --model meta-llama/Llama-2-7b-chat-hf --weight-format fp16 ov_llama_2
+
+         .. tab-item:: Diffusion models (text2image)
+            :sync: diff-text-img
+
+            .. code-block:: console
+
+               optimum-cli export openvino --model stabilityai/stable-diffusion-xl-base-1.0 --weight-format fp16 ov_SDXL
+
+         .. tab-item:: VLM (Image processing):
+            :sync: vlm-img-proc
+
+            .. code-block:: console
+
+               optimum-cli export openvino --model openbmb/MiniCPM-V-2_6 --trust-remote-code –weight-format fp16 ov_MiniCPM-V-2_6
+
+         .. tab-item:: Whisper models (speech2text):
+            :sync: whisp-speech-txt
+
+            .. code-block:: console
+
+               optimum-cli export openvino --trust-remote-code --model openai/whisper-base ov_whisper
+
+   .. tab-item:: Exporting to selected precision
+      :sync: low-precision
+
+      .. code-block:: console
+
+         optimum-cli export openvino --model <model_id> --weight-format int4 <exported_model_name>
+
+      Examples:
+
+      .. tab-set::
+
+         .. tab-item:: LLM (text generation)
+            :sync: llm-text-gen
+
+            .. code-block:: console
+
+               optimum-cli export openvino --model meta-llama/Llama-2-7b-chat-hf --weight-format int4 ov_llama_2
+
+         .. tab-item:: Diffusion models (text2image)
+            :sync: diff-text-img
+
+            .. code-block:: console
+
+               optimum-cli export openvino --model stabilityai/stable-diffusion-xl-base-1.0 --weight-format int4 ov_SDXL
+
+         .. tab-item:: VLM (Image processing)
+            :sync: vlm-img-proc
+
+            .. code-block:: console
+
+               optimum-cli export openvino -m model_path --task text-generation-with-past --weight-format int4 ov_MiniCPM-V-2_6
+
+
+.. note::
+
+   Any other ``model_id``, for example ``openbmb/MiniCPM-V-2_6``, or the path
+   to a local model file can be used.
+
+   Also, you can specify different data type like ``int8``.
+
+
+Additional Resources
+###############################################################################
+
+* `Full set of optimum-cli parameters <https://huggingface.co/docs/optimum/en/intel/openvino/export>`__
+* :doc:`Model conversion in OpenVINO <../../openvino-workflow/model-preparation/convert-model-to-ir>`
+* :doc:`Model optimization in OpenVINO <../../openvino-workflow/model-optimization>`