[Model] Add Ernie4.5 VL Model Support

docs/models/supported_models.md

@@ -616,6 +616,7 @@ These models primarily accept the [`LLM.generate`](./generative_models.md#llmgen
 | `Cohere2VisionForConditionalGeneration` | Command A Vision | T + I<sup>+</sup> | `CohereLabs/command-a-vision-07-2025`, etc. | | ✅︎ | ✅︎ |
 | `DeepseekVLV2ForCausalLM`<sup>^</sup> | DeepSeek-VL2 | T + I<sup>+</sup> | `deepseek-ai/deepseek-vl2-tiny`, `deepseek-ai/deepseek-vl2-small`, `deepseek-ai/deepseek-vl2`, etc. | | ✅︎ | ✅︎ |
 | `DonutForConditionalGeneration`<sup>^</sup> | Donut | T + I | `ByteDance/Dolphin`, `naver-clova-ix/donut-base-finetuned-docvqa`, etc. | | | |
+| `Ernie4_5_VLMoeForConditionalGeneration` | Ernie4.5-VL | T + I<sup>+</sup>/ V<sup>+</sup> | `baidu/ERNIE-4.5-VL-28B-A3B-PT`, `baidu/ERNIE-4.5-VL-424B-A47B-PT` | | ✅︎ | ✅︎ |
 | `Florence2ForConditionalGeneration` | Florence-2 | T + I | `microsoft/Florence-2-base`, `microsoft/Florence-2-large`, etc. | | | |
 | `FuyuForCausalLM` | Fuyu | T + I | `adept/fuyu-8b`, etc. | | ✅︎ | ✅︎ |
 | `Gemma3ForConditionalGeneration` | Gemma 3 | T + I<sup>+</sup> | `google/gemma-3-4b-it`, `google/gemma-3-27b-it`, etc. | ✅︎ | ✅︎ | ⚠️ |

examples/offline_inference/vision_language.py

@@ -173,6 +173,37 @@ def run_deepseek_vl2(questions: list[str], modality: str) -> ModelRequestData:
     )
 
 
+# Ernie4.5-VL
+def run_ernie45_vl(questions: list[str], modality: str) -> ModelRequestData:
+    model_name = "baidu/ERNIE-4.5-VL-28B-A3B-PT"
+
+    engine_args = EngineArgs(
+        model=model_name,
+        max_model_len=4096,
+        max_num_seqs=5,
+        limit_mm_per_prompt={modality: 1},
+        trust_remote_code=True,
+    )
+
+    if modality == "image":
+        placeholder = "Picture 1:<|IMAGE_START|><|image@placeholder|><|IMAGE_END|>"
+    elif modality == "video":
+        placeholder = "Video 1:<|VIDEO_START|><|video@placeholder|><|VIDEO_END|>"
+
+    prompts = [
+        (
+            f"<|begin_of_sentence|>User: {question}{placeholder}\n"
+            "Assistant: <think></think>"
+        )
+        for question in questions
+    ]
+
+    return ModelRequestData(
+        engine_args=engine_args,
+        prompts=prompts,
+    )
+
+
 # Florence2
 def run_florence2(questions: list[str], modality: str) -> ModelRequestData:
     assert modality == "image"
@@ -1602,6 +1633,7 @@ def run_tarsier2(questions: list[str], modality: str) -> ModelRequestData:
     "chameleon": run_chameleon,
     "command_a_vision": run_command_a_vision,
     "deepseek_vl_v2": run_deepseek_vl2,
+    "ernie45_vl": run_ernie45_vl,
     "florence2": run_florence2,
     "fuyu": run_fuyu,
     "gemma3": run_gemma3,

requirements/test.in

@@ -54,3 +54,4 @@ runai-model-streamer-s3==0.11.0
 fastsafetensors>=0.1.10
 pydantic>=2.10 # 2.9 leads to error on python 3.10
 terratorch==1.1rc2 # required for PrithviMAE test
+decord==0.6.0

requirements/test.txt

@@ -156,6 +156,8 @@ datasets==3.0.2
     #   mteb
 decorator==5.1.1
     # via librosa
+decord==0.6.0
+    # via -r requirements/test.in
 dill==0.3.8
     # via
     #   datasets
@@ -493,6 +495,7 @@ numpy==1.26.4
     #   contourpy
     #   cupy-cuda12x
     #   datasets
+    #   decord
     #   einx
     #   encodec
     #   evaluate

tests/models/multimodal/processing/test_common.py

@@ -272,6 +272,7 @@ def _test_processing_correctness_one(
     "CohereLabs/command-a-vision-07-2025",
     "deepseek-ai/deepseek-vl2-tiny",
     "naver-clova-ix/donut-base-finetuned-docvqa",
+    "baidu/ERNIE-4.5-VL-28B-A3B-PT",
     "microsoft/Florence-2-base",
     "adept/fuyu-8b",
     "google/gemma-3-4b-it",

tests/models/registry.py

@@ -396,6 +396,8 @@ def check_available_online(
                                                 transformers_version_reason="HF model is not compatible.",  # noqa: E501
                                                 hf_overrides={"architectures": ["DeepseekVLV2ForCausalLM"]}),  # noqa: E501
     "Emu3ForConditionalGeneration": _HfExamplesInfo("BAAI/Emu3-Chat-hf"),
+    "Ernie4_5_VLMoeForConditionalGeneration": _HfExamplesInfo("baidu/ERNIE-4.5-VL-28B-A3B-PT",  # noqa: E501
+                                                              trust_remote_code=True),
     "FuyuForCausalLM": _HfExamplesInfo("adept/fuyu-8b"),
     "Gemma3ForConditionalGeneration": _HfExamplesInfo("google/gemma-3-4b-it"),
     "Gemma3nForConditionalGeneration": _HfExamplesInfo("google/gemma-3n-E2B-it",    # noqa: E501

vllm/model_executor/layers/rotary_embedding/ernie45_vl_rope.py

@@ -0,0 +1,72 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+
+from typing import Optional
+
+import torch
+
+from .common import apply_rotary_emb_dispatch
+from .mrope import MRotaryEmbedding
+
+
+class Ernie4_5_VLRotaryEmbedding(MRotaryEmbedding):
+    """3D rotary positional embedding. 3D is t:time h:height w:width"""
+
+    def forward(
+        self,
+        positions: torch.Tensor,
+        query: torch.Tensor,
+        key: Optional[torch.Tensor] = None,
+    ) -> tuple[torch.Tensor, Optional[torch.Tensor]]:
+        assert positions.ndim == 1 or positions.ndim == 2
+        assert key is not None
+
+        num_tokens = positions.shape[-1]
+        cos_sin = self.cos_sin_cache[positions]
+        cos, sin = cos_sin.chunk(2, dim=-1)
+        if positions.ndim == 2:
+            assert self.mrope_section
+
+            section_h = self.mrope_section[0]  # 22
+            section_w = self.mrope_section[1]  # 22
+            section_t = self.mrope_section[2]  # 20
+            assert section_h == section_w
+            # Split according to [h w h w h w h w... t t t...]
+            section_cos_t = cos[..., -section_t:]
+            section_cos_h = cos[..., :section_h + section_w:2]
+            section_cos_w = cos[..., 1:section_h + section_w:2]
+
+            cos_t, cos_h, cos_w = section_cos_t[0], section_cos_h[
+                1], section_cos_w[2]
+            cos_hw = torch.stack([cos_h, cos_w],
+                                 dim=-1).reshape(cos_h.shape[:-1] +
+                                                 (cos_h.shape[-1] * 2, ))
+            cos = torch.cat([cos_hw, cos_t], dim=-1)
+
+            section_sin_t = sin[..., -section_t:]
+            section_sin_h = sin[..., :section_h + section_w:2]
+            section_sin_w = sin[..., 1:section_h + section_w:2]
+
+            sin_t, sin_h, sin_w = section_sin_t[0], section_sin_h[
+                1], section_sin_w[2]
+            sin_hw = torch.stack([sin_h, sin_w],
+                                 dim=-1).reshape(sin_h.shape[:-1] +
+                                                 (sin_h.shape[-1] * 2, ))
+            sin = torch.cat([sin_hw, sin_t], dim=-1)
+
+        query_shape = query.shape
+        query = query.view(num_tokens, -1, self.head_size)
+        query_rot = query[..., :self.rotary_dim]
+        query_pass = query[..., self.rotary_dim:]
+        query_rot = apply_rotary_emb_dispatch(query_rot, cos, sin,
+                                              self.is_neox_style)
+        query = torch.cat((query_rot, query_pass), dim=-1).reshape(query_shape)
+
+        key_shape = key.shape
+        key = key.view(num_tokens, -1, self.head_size)
+        key_rot = key[..., :self.rotary_dim]
+        key_pass = key[..., self.rotary_dim:]
+        key_rot = apply_rotary_emb_dispatch(key_rot, cos, sin,
+                                            self.is_neox_style)
+        key = torch.cat((key_rot, key_pass), dim=-1).reshape(key_shape)
+        return query, key

vllm/model_executor/layers/rotary_embedding/mrope.py

@@ -393,6 +393,15 @@ def get_input_positions_tensor(
                 context_len=context_len,
                 seq_len=seq_len,
             )
+        elif hf_config.model_type in ["ernie4_5_moe_vl", "ernie4_5_vl"]:
+            return cls._ernie_get_input_positions_tensor(
+                input_tokens=input_tokens,
+                hf_config=hf_config,
+                image_grid_thw=image_grid_thw,
+                video_grid_thw=video_grid_thw,
+                context_len=context_len,
+                seq_len=seq_len,
+            )
         else:
             return cls._vl_get_input_positions_tensor(
                 input_tokens=input_tokens,
@@ -513,6 +522,120 @@ def _glm4v_get_input_positions_tensor(
                                 len(input_tokens)).item()
         return llm_positions, mrope_position_delta
 
+    @classmethod
+    def _ernie_get_input_positions_tensor(
+        cls,
+        input_tokens: list[int],
+        hf_config: PretrainedConfig,
+        image_grid_thw: Union[list[list[int]], torch.Tensor],
+        video_grid_thw: Union[list[list[int]], torch.Tensor],
+        context_len: int = 0,
+        seq_len: Optional[int] = None,
+    ) -> tuple[torch.Tensor, int]:
+        """Get mrope input positions and delta value for Ernie VL."""
+
+        image_token_id = hf_config.im_patch_id
+        video_start_token_id = hf_config.video_start_token_id
+        video_end_token_id = hf_config.video_end_token_id
+        spatial_conv_size = hf_config.spatial_conv_size
+        temporal_conv_size = hf_config.temporal_conv_size
+        llm_pos_ids_list: list = []
+
+        if not (image_grid_thw is None and video_grid_thw is None):
+            if isinstance(image_grid_thw, torch.Tensor):
+                image_grid_thw = image_grid_thw.tolist()
+
+            input_token_type: list[str] = []
+            video_check_flg = False
+            for token in input_tokens:
+                if token == video_start_token_id:
+                    video_check_flg = True
+                elif token == video_end_token_id:
+                    video_check_flg = False
+
+                if (token == image_token_id) and (video_check_flg is False):
+                    input_token_type.append("image")
+                elif (token == image_token_id) and (video_check_flg is True):
+                    input_token_type.append("video")
+                else:
+                    input_token_type.append("text")
+
+            input_type_group: list[tuple[str, int, int]] = []
+            for key, group_iter in itertools.groupby(
+                    enumerate(input_token_type), lambda x: x[1]):
+                group_list = list(group_iter)
+                start_index = group_list[0][0]
+                end_index = group_list[-1][0] + 1
+                input_type_group.append((key, start_index, end_index))
+
+            video_frame_num = 1
+            mm_data_idx = 0
+            for modality_type, start_idx, end_idx in input_type_group:
+                st_idx = llm_pos_ids_list[-1].max() + 1 if len(
+                    llm_pos_ids_list) > 0 else 0
+                if modality_type == "image":
+                    t, h, w = (
+                        image_grid_thw[mm_data_idx][0],
+                        image_grid_thw[mm_data_idx][1],
+                        image_grid_thw[mm_data_idx][2],
+                    )
+                    llm_grid_t, llm_grid_h, llm_grid_w = \
+                        t, h // spatial_conv_size, w // spatial_conv_size
+
+                    t_index = torch.arange(llm_grid_t).view(-1, 1).expand(
+                        -1, llm_grid_h * llm_grid_w).flatten()
+                    h_index = torch.arange(llm_grid_h).view(1, -1, 1).expand(
+                        llm_grid_t, -1, llm_grid_w).flatten()
+                    w_index = torch.arange(llm_grid_w).view(1, 1, -1).expand(
+                        llm_grid_t, llm_grid_h, -1).flatten()
+                    llm_pos_ids_list.append(
+                        torch.stack([t_index, h_index, w_index]) + st_idx)
+                    mm_data_idx += 1
+
+                elif modality_type == "video":
+                    t, h, w = (
+                        video_grid_thw[mm_data_idx][0],
+                        video_grid_thw[mm_data_idx][1],
+                        video_grid_thw[mm_data_idx][2],
+                    )
+                    llm_grid_t, llm_grid_h, llm_grid_w = (t //
+                                                          temporal_conv_size,
+                                                          h //
+                                                          spatial_conv_size,
+                                                          w //
+                                                          spatial_conv_size)
+
+                    for t_idx in range(llm_grid_t):
+                        t_index = torch.tensor(t_idx).view(-1, 1).expand(
+                            -1, llm_grid_h * llm_grid_w).flatten()
+                        h_index = torch.arange(llm_grid_h).view(
+                            1, -1, 1).expand(1, -1, llm_grid_w).flatten()
+                        w_index = torch.arange(llm_grid_w).view(
+                            1, 1, -1).expand(1, llm_grid_h, -1).flatten()
+                        llm_pos_ids_list.append(
+                            torch.stack([t_index, h_index, w_index]) + st_idx)
+
+                    mm_data_idx += 1
+                    video_frame_num += 1
+
+                else:
+                    text_len = end_idx - start_idx
+                    llm_pos_ids_list.append(
+                        torch.arange(text_len).view(1, -1).expand(3, -1) +
+                        st_idx)
+                    video_frame_num = 1
+
+        else:
+            text_len = len(input_tokens)
+            llm_pos_ids_list.append(
+                torch.arange(text_len).view(1, -1).expand(3, -1))
+
+        llm_positions = torch.cat(llm_pos_ids_list, dim=1).reshape(3, -1)
+        llm_positions = llm_positions[:, context_len:seq_len]
+        mrope_position_delta = (llm_positions.max() + 1 -
+                                len(input_tokens)).item()
+        return llm_positions, mrope_position_delta
+
     @classmethod
     def _vl_get_input_positions_tensor(
         cls,