docs:add torch flow supported model list. (#4129)

Signed-off-by: nv-guomingz <[email protected]>

Author: nv-guomingz

docs/source/reference/support-matrix.md

@@ -4,7 +4,34 @@
 
 TensorRT-LLM optimizes the performance of a range of well-known models on NVIDIA GPUs. The following sections provide a list of supported GPU architectures as well as important features implemented in TensorRT-LLM.
 
-## Models
+## Models (PyTorch Backend)
+
+| Architecture | Model | HuggingFace Example | Modality |
+|--------------|-------|---------------------|----------|
+| `BertForSequenceClassification` | BERT-based | `textattack/bert-base-uncased-yelp-polarity` | L |
+| `DeciLMForCausalLM` | Nemotron | `nvidia/Llama-3_1-Nemotron-51B-Instruct` | L |
+| `DeepseekV3ForCausalLM` | DeepSeek-V3 | `deepseek-ai/DeepSeek-V3 `| L |
+| `LlavaLlamaModel` | VILA | `Efficient-Large-Model/NVILA-8B` | L + V |
+| `LlavaNextForConditionalGeneration` | LLaVA-NeXT | `llava-hf/llava-v1.6-mistral-7b-hf` | L + V |
+| `LlamaForCausalLM` | Llama 3.1, Llama 3, Llama 2, LLaMA | `meta-llama/Meta-Llama-3.1-70B` | L |
+| `Llama4ForConditionalGeneration` | Llama 4 | `meta-llama/Llama-4-Scout-17B-16E-Instruct` | L |
+| `MistralForCausalLM` | Mistral | `mistralai/Mistral-7B-v0.1` | L |
+| `MixtralForCausalLM` | Mixtral | `mistralai/Mixtral-8x7B-v0.1` | L |
+| `MllamaForConditionalGeneration` | Llama 3.2 | `meta-llama/Llama-3.2-11B-Vision` | L |
+| `NemotronForCausalLM` | Nemotron-3, Nemotron-4, Minitron | `nvidia/Minitron-8B-Base` | L |
+| `NemotronNASForCausalLM` | NemotronNAS | `nvidia/Llama-3_3-Nemotron-Super-49B-v1` | L |
+| `Qwen2ForCausalLM` | QwQ, Qwen2 | `Qwen/Qwen2-7B-Instruct` | L |
+| `Qwen2ForProcessRewardModel` | Qwen2-based | `Qwen/Qwen2.5-Math-PRM-7B` | L |
+| `Qwen2ForRewardModel` | Qwen2-based | `Qwen/Qwen2.5-Math-RM-72B` | L |
+| `Qwen2VLForConditionalGeneration` | Qwen2-VL | `Qwen/Qwen2-VL-7B-Instruct` | L + V |
+| `Qwen2_5_VLForConditionalGeneration` | Qwen2.5-VL | `Qwen/Qwen2.5-VL-7B-Instruct` | L + V |
+
+Note:
+- L: Language only
+- L + V: Language and Vision multimodal support
+- Llama 3.2 accepts vision input, but our support currently limited to text only.
+
+## Models (TensorRT Backend)
 
 ### LLM Models