diff --git a/olive/olive_config.json b/olive/olive_config.json
index 2748c39101..4168e0b2d3 100644
--- a/olive/olive_config.json
+++ b/olive/olive_config.json
@@ -626,6 +626,15 @@
             "supported_algorithms": [  ],
             "supported_quantization_encodings": [  ],
             "run_on_target": true
+        },
+        "VitisGenerateModelSD": {
+            "module_path": "olive.passes.onnx.vitis_ai.vitis_generate_model_sd.VitisGenerateModelSD",
+            "supported_providers": [ "CPUExecutionProvider" ],
+            "supported_accelerators": [ "cpu" ],
+            "supported_precisions": [ "int8" ],
+            "supported_algorithms": [  ],
+            "supported_quantization_encodings": [  ],
+            "run_on_target": true
         }
     },
     "extra_dependencies": {
diff --git a/olive/passes/onnx/vitis_ai/vitis_generate_model_sd.py b/olive/passes/onnx/vitis_ai/vitis_generate_model_sd.py
new file mode 100644
index 0000000000..9fc5059aec
--- /dev/null
+++ b/olive/passes/onnx/vitis_ai/vitis_generate_model_sd.py
@@ -0,0 +1,138 @@
+# -------------------------------------------------------------------------
+# Copyright (C) 2026, Advanced Micro Devices, Inc. All rights reserved.
+# SPDX-License-Identifier: MIT
+# -------------------------------------------------------------------------
+
+"""Olive Pass for Vitis NPU Stable Diffusion submodel generation.
+
+Accepts ONNX input only; run OnnxConversion to produce ONNX input model first,
+then this pass runs generate_sd_model to generate NPU-ready models.
+"""
+
+from __future__ import annotations
+
+import logging
+import shutil
+from pathlib import Path
+
+from model_generate import generate_model
+from model_generate.recipes import get_supported_sd_model_types
+
+from olive.model import ONNXModelHandler
+from olive.passes import Pass
+from olive.passes.pass_config import BasePassConfig, PassConfigParam
+
+logger = logging.getLogger(__name__)
+SUPPORTED_SD_MODEL_TYPES = get_supported_sd_model_types()
+
+
+class VitisGenerateModelSD(Pass):
+    """Generate Vitis NPU-ready SD submodel from ONNX input.
+
+    Use OnnxConversion to produce ONNX input model.
+    Optional resolutions to generate NPU-ready models. Default is [512x512].
+    """
+
+    @classmethod
+    def _default_config(cls, accelerator_spec):
+        return {
+            "model_type": PassConfigParam(
+                type_=str,
+                required=True,
+                description=f"SD submodel type, must be one of {', '.join(SUPPORTED_SD_MODEL_TYPES)}.",
+            ),
+            "resolutions": PassConfigParam(
+                type_=list[str],
+                default_value=["512x512"],
+                required=False,
+                description="List of resolutions (e.g. ['512x512', '1024x1024']) Default is [512x512].",
+            ),
+        }
+
+    @staticmethod
+    def _validate_model_type(model_type: str) -> None:
+        if model_type not in SUPPORTED_SD_MODEL_TYPES:
+            raise ValueError(f"model_type must be one of {', '.join(SUPPORTED_SD_MODEL_TYPES)}, got {model_type!r}")
+
+    def _run_for_config(
+        self,
+        model: ONNXModelHandler,
+        config: BasePassConfig,
+        output_model_path: str,
+    ) -> ONNXModelHandler:
+        if not isinstance(model, ONNXModelHandler):
+            raise TypeError(
+                f"VitisGenerateModelSD requires ONNXModelHandler (run OnnxConversion first). Got {type(model).__name__}"
+            )
+        model_type = config.model_type
+        self._validate_model_type(model_type)
+
+        output_dir = Path(output_model_path)
+        if output_dir.suffix == ".onnx":
+            output_dir = output_dir.parent
+        output_dir.mkdir(parents=True, exist_ok=True)
+
+        logger.info(
+            "[VitisGenerateModelSD] output_dir=%s, model_type=%s",
+            output_dir,
+            model_type,
+        )
+
+        onnx_input_path = self._resolve_onnx_input_path(model)
+        logger.info("[VitisGenerateModelSD] ONNX input path: %s", onnx_input_path)
+
+        resolutions = getattr(config, "resolutions", None)
+        if resolutions:
+            logger.info(
+                "[VitisGenerateModelSD] Using resolutions: %s",
+                resolutions,
+            )
+
+        generate_model(
+            mode="sd",
+            input_model=str(onnx_input_path),
+            output_dir=str(output_dir),
+            extra_options={"model_type": model_type, "resolutions": ",".join(resolutions)},
+        )
+
+        self._ensure_model_onnx(output_dir)
+
+        return ONNXModelHandler(
+            model_path=str(output_dir),
+            onnx_file_name="model.onnx",
+        )
+
+    def _resolve_onnx_input_path(self, model: ONNXModelHandler) -> Path:
+        p = Path(model.model_path)
+        if p.is_file():
+            return p
+        if p.is_dir():
+            name = getattr(model, "onnx_file_name", None)
+            if name:
+                f = p / name
+                if f.exists():
+                    return f
+            onnx_files = list(p.glob("*.onnx"))
+            if onnx_files:
+                return onnx_files[0]
+            raise FileNotFoundError(f"No .onnx file found under {p}")
+        raise FileNotFoundError(f"Model path does not exist: {p}")
+
+    def _ensure_model_onnx(self, output_dir: Path) -> None:
+        """Copy actual generate_sd_model output to output_dir/model.onnx if needed."""
+        model_onnx = output_dir / "model.onnx"
+        if model_onnx.exists():
+            return
+        optimized = output_dir / "optimized.onnx"
+        dd_replaced = output_dir / "dd" / "replaced.onnx"
+        if dd_replaced.exists():
+            shutil.copy2(dd_replaced, model_onnx)
+            logger.info("[VitisGenerateModelSD] Wrote model.onnx from dd/replaced.onnx")
+        elif optimized.exists():
+            shutil.copy2(optimized, model_onnx)
+            logger.info("[VitisGenerateModelSD] Wrote model.onnx from optimized.onnx")
+        else:
+            logger.warning(
+                "[VitisGenerateModelSD] No optimized.onnx or dd/replaced.onnx found under %s",
+                output_dir,
+            )