diff --git a/invokeai/app/invocations/prompt_augmentation.py b/invokeai/app/invocations/prompt_augmentation.py
new file mode 100644
index 0000000000..9f8101fac8
--- /dev/null
+++ b/invokeai/app/invocations/prompt_augmentation.py
@@ -0,0 +1,85 @@
+from pathlib import Path
+
+import torch
+from transformers import AutoModelForCausalLM, AutoTokenizer
+
+from invokeai.app.invocations.baseinvocation import BaseInvocation, invocation
+from invokeai.app.invocations.fields import (
+    InputField,
+)
+from invokeai.app.invocations.primitives import StringOutput
+from invokeai.app.services.shared.invocation_context import InvocationContext
+from invokeai.backend.util.devices import TorchDevice
+
+AUGMENT_PROMPT_INSTRUCTION = """Your task is to translate a short image caption and a style caption to a more detailed caption for the same image. The detailed caption should adhere to the following:
+- be 1 sentence long
+- use descriptive language that relates to the subject of interest
+- it may add new details, but shouldn't change the subject of the original caption
+Here are some examples:
+Original caption: "A cat on a table"
+Detailed caption: "A fluffy cat with a curious expression, sitting on a wooden table next to a vase of flowers."
+Original caption: "medieval armor"
+Detailed caption: "The gleaming suit of medieval armor stands proudly in the museum, its intricate engravings telling tales of long-forgotten battles and chivalry."
+Original caption: "A panda bear as a mad scientist"
+Detailed caption: "Clad in a tiny lab coat and goggles, the panda bear feverishly mixes colorful potions, embodying the eccentricity of a mad scientist in its whimsical laboratory."
+Here is the prompt to translate:
+Original caption: "{}"
+Detailed caption:"""
+
+
+@invocation("promp_augment", title="Prompt Augmentation", tags=["prompt"], category="conditioning", version="1.0.0")
+class PrompAugmentationInvocation(BaseInvocation):
+    """Use an LLM to augment a text prompt."""
+
+    prompt: str = InputField(description="The text prompt to augment.")
+
+    @torch.inference_mode()
+    def invoke(self, context: InvocationContext) -> StringOutput:
+        # TODO(ryand): Address the following situations in the input prompt:
+        # - Prompt contains a TI embeddings.
+        # - Prompt contains .and() compel syntax. (Is ther any other compel syntax we need to handle?)
+        # - Prompt contains quotation marks that could cause confusion when embedded in an LLM instruct prompt.
+
+        # Load the model and tokenizer.
+        model_source = "microsoft/Phi-3-mini-4k-instruct"
+
+        def model_loader(model_path: Path):
+            return AutoModelForCausalLM.from_pretrained(
+                model_path, torch_dtype=TorchDevice.choose_torch_dtype(), local_files_only=True
+            )
+
+        def tokenizer_loader(model_path: Path):
+            return AutoTokenizer.from_pretrained(model_path, local_files_only=True)
+
+        with (
+            context.models.load_remote_model(source=model_source, loader=model_loader) as model,
+            context.models.load_remote_model(source=model_source, loader=tokenizer_loader) as tokenizer,
+        ):
+            # Tokenize the input prompt.
+            augmented_prompt = self._run_instruct_model(model, tokenizer, self.prompt)
+
+        return StringOutput(value=augmented_prompt)
+
+    def _run_instruct_model(self, model: AutoModelForCausalLM, tokenizer: AutoTokenizer, prompt: str) -> str:
+        messages = [
+            {
+                "role": "user",
+                "content": AUGMENT_PROMPT_INSTRUCTION.format(prompt),
+            }
+        ]
+        inputs = tokenizer.apply_chat_template(messages, add_generation_prompt=True, return_tensors="pt")
+        inputs = inputs.to(model.device)
+
+        outputs = model.generate(
+            inputs,
+            max_new_tokens=200,
+            temperature=0.9,
+            do_sample=True,
+        )
+        text = tokenizer.batch_decode(outputs)[0]
+        assert isinstance(text, str)
+
+        output = text.split("<|assistant|>")[-1].strip()
+        output = output.split("<|end|>")[0].strip()
+
+        return output
diff --git a/invokeai/backend/model_manager/util/select_hf_files.py b/invokeai/backend/model_manager/util/select_hf_files.py
index b0a9551437..c6c7186454 100644
--- a/invokeai/backend/model_manager/util/select_hf_files.py
+++ b/invokeai/backend/model_manager/util/select_hf_files.py
@@ -62,7 +62,13 @@ def filter_files(
         # downloading random checkpoints that might also be in the repo. However there is no guarantee
         # that a checkpoint doesn't contain "model" in its name, and no guarantee that future diffusers models
         # will adhere to this naming convention, so this is an area to be careful of.
-        elif re.search(r"model(\.[^.]+)?\.(safetensors|bin|onnx|xml|pth|pt|ckpt|msgpack)$", file.name):
+        #
+        # On July 24, 2024, this regex filter was modified to support downloading the `microsoft/Phi-3-mini-4k-instruct`
+        # model. I am making this note in case it is relevant as we continue to improve this logic and make it less
+        # brittle.
+        #   - Before: r"model(\.[^.]+)?\.(safetensors|bin|onnx|xml|pth|pt|ckpt|msgpack)$"
+        #   - After: r"model.*\.(safetensors|bin|onnx|xml|pth|pt|ckpt|msgpack)$"
+        elif re.search(r"model.*\.(safetensors|bin|onnx|xml|pth|pt|ckpt|msgpack)$", file.name):
             paths.append(file)
 
     # limit search to subfolder if requested