format

- Fix typo: 'matrilize' -> 'materialize'
- Improve clarity and formatting of --no-recompute flag explanation
- Add code block for better readability

README.md

@@ -201,7 +201,7 @@ LEANN supports RAG on various data sources including documents (`.pdf`, `.txt`,
 
 #### LLM Backend
 
-LEANN supports many LLM providers for text generation (HuggingFace, Ollama, and Any OpenAI compatible API).
+LEANN supports many LLM providers for text generation (HuggingFace, Ollama, Anthropic, and Any OpenAI compatible API).
 
 
 <details>
@@ -269,6 +269,7 @@ Below is a list of base URLs for common providers to get you started.
 | **SiliconFlow** | `https://api.siliconflow.cn/v1`                            |
 | **Zhipu (BigModel)** | `https://open.bigmodel.cn/api/paas/v4/`                |
 | **Mistral AI** | `https://api.mistral.ai/v1`                                |
+| **Anthropic** | `https://api.anthropic.com/v1`                                |
 
 
 
@@ -328,7 +329,7 @@ All RAG examples share these common parameters. **Interactive mode** is availabl
 --embedding-mode MODE        # sentence-transformers, openai, mlx, or ollama
 
 # LLM Parameters (Text generation models)
---llm TYPE                   # LLM backend: openai, ollama, or hf (default: openai)
+--llm TYPE                   # LLM backend: openai, ollama, hf, or anthropic (default: openai)
 --llm-model MODEL            # Model name (default: gpt-4o) e.g., gpt-4o-mini, llama3.2:1b, Qwen/Qwen2.5-1.5B-Instruct
 --thinking-budget LEVEL      # Thinking budget for reasoning models: low/medium/high (supported by o3, o3-mini, GPT-Oss:20b, and other reasoning models)
 
@@ -1057,10 +1058,10 @@ Options:
 leann ask INDEX_NAME [OPTIONS]
 
 Options:
-  --llm {ollama,openai,hf}    LLM provider (default: ollama)
+  --llm {ollama,openai,hf,anthropic}    LLM provider (default: ollama)
-  --model MODEL               Model name (default: qwen3:8b)
+  --model MODEL                         Model name (default: qwen3:8b)
-  --interactive              Interactive chat mode
+  --interactive                         Interactive chat mode
-  --top-k N                  Retrieval count (default: 20)
+  --top-k N                             Retrieval count (default: 20)
 ```
 
 **List Command:**

apps/multimodal/vision-based-pdf-multi-vector/leann_multi_vector.py

@@ -1,5 +1,7 @@
 import concurrent.futures
+import glob
 import json
+import logging
 import os
 import re
 import sys
@@ -11,6 +13,8 @@ import numpy as np
 from PIL import Image
 from tqdm import tqdm
 
+logger = logging.getLogger(__name__)
+
 
 def _ensure_repo_paths_importable(current_file: str) -> None:
     """Make local leann packages importable without installing (mirrors multi-vector-leann.py)."""
@@ -96,12 +100,63 @@ def _natural_sort_key(name: str) -> int:
     return int(m.group()) if m else 0
 
 
-def _load_images_from_dir(pages_dir: str) -> tuple[list[str], list[Image.Image]]:
+def _load_images_from_dir(
-    filenames = [n for n in os.listdir(pages_dir) if n.lower().endswith((".png", ".jpg", ".jpeg"))]
+    pages_dir: str, recursive: bool = False
-    filenames = sorted(filenames, key=_natural_sort_key)
+) -> tuple[list[str], list[Image.Image]]:
-    filepaths = [os.path.join(pages_dir, n) for n in filenames]
+    """
-    images = [Image.open(p) for p in filepaths]
+    Load images from a directory.
-    return filepaths, images
+
+    Args:
+        pages_dir: Directory path containing images
+        recursive: If True, recursively search subdirectories (default: False)
+
+    Returns:
+        Tuple of (filepaths, images)
+    """
+
+    # Supported image extensions
+    extensions = ("*.png", "*.jpg", "*.jpeg", "*.PNG", "*.JPG", "*.JPEG", "*.webp", "*.WEBP")
+
+    if recursive:
+        # Recursive search
+        filepaths = []
+        for ext in extensions:
+            pattern = os.path.join(pages_dir, "**", ext)
+            filepaths.extend(glob.glob(pattern, recursive=True))
+    else:
+        # Non-recursive search (only top-level directory)
+        filepaths = []
+        for ext in extensions:
+            pattern = os.path.join(pages_dir, ext)
+            filepaths.extend(glob.glob(pattern))
+
+    # Sort files naturally
+    filepaths = sorted(filepaths, key=lambda x: _natural_sort_key(os.path.basename(x)))
+
+    # Load images with error handling
+    images = []
+    valid_filepaths = []
+    failed_count = 0
+
+    for filepath in filepaths:
+        try:
+            img = Image.open(filepath)
+            # Convert to RGB if necessary (handles RGBA, P, etc.)
+            if img.mode != "RGB":
+                img = img.convert("RGB")
+            images.append(img)
+            valid_filepaths.append(filepath)
+        except Exception as e:
+            failed_count += 1
+            print(f"Warning: Failed to load image {filepath}: {e}")
+            continue
+
+    if failed_count > 0:
+        print(
+            f"Warning: Failed to load {failed_count} image(s) out of {len(filepaths)} total files"
+        )
+
+    return valid_filepaths, images
 
 
 def _maybe_convert_pdf_to_images(pdf_path: Optional[str], pages_dir: str, dpi: int = 200) -> None:
@@ -151,36 +206,99 @@ def _select_device_and_dtype():
 
 
 def _load_colvision(model_choice: str):
+    import os
+
     import torch
-    from colpali_engine.models import ColPali, ColQwen2, ColQwen2Processor
+    from colpali_engine.models import (
+        ColPali,
+        ColQwen2,
+        ColQwen2_5,
+        ColQwen2_5_Processor,
+        ColQwen2Processor,
+    )
     from colpali_engine.models.paligemma.colpali.processing_colpali import ColPaliProcessor
     from transformers.utils.import_utils import is_flash_attn_2_available
 
+    # Force HuggingFace Hub to use HF endpoint, avoid Google Drive
+    # Set environment variables to ensure models are downloaded from HuggingFace
+    os.environ.setdefault("HF_ENDPOINT", "https://huggingface.co")
+    os.environ.setdefault("HF_HUB_ENABLE_HF_TRANSFER", "1")
+
+    # Log model loading info
+    logger.info(f"Loading ColVision model: {model_choice}")
+    logger.info(f"HF_ENDPOINT: {os.environ.get('HF_ENDPOINT', 'not set')}")
+    logger.info("Models will be downloaded from HuggingFace Hub, not Google Drive")
+
     device_str, device, dtype = _select_device_and_dtype()
 
+    # Determine model name and type
+    # IMPORTANT: Check colqwen2.5 BEFORE colqwen2 to avoid false matches
+    model_choice_lower = model_choice.lower()
     if model_choice == "colqwen2":
         model_name = "vidore/colqwen2-v1.0"
-        # On CPU/MPS we must avoid flash-attn and stay eager; on CUDA prefer flash-attn if available
+        model_type = "colqwen2"
-        attn_implementation = (
+    elif model_choice == "colqwen2.5" or model_choice == "colqwen25":
-            "flash_attention_2"
+        model_name = "vidore/colqwen2.5-v0.2"
-            if (device_str == "cuda" and is_flash_attn_2_available())
+        model_type = "colqwen2.5"
-            else "eager"
+    elif model_choice == "colpali":
-        )
+        model_name = "vidore/colpali-v1.2"
+        model_type = "colpali"
+    elif (
+        "colqwen2.5" in model_choice_lower
+        or "colqwen25" in model_choice_lower
+        or "colqwen2_5" in model_choice_lower
+    ):
+        # Handle HuggingFace model names like "vidore/colqwen2.5-v0.2"
+        model_name = model_choice
+        model_type = "colqwen2.5"
+    elif "colqwen2" in model_choice_lower and "colqwen2-v1.0" in model_choice_lower:
+        # Handle HuggingFace model names like "vidore/colqwen2-v1.0" (but not colqwen2.5)
+        model_name = model_choice
+        model_type = "colqwen2"
+    elif "colpali" in model_choice_lower:
+        # Handle HuggingFace model names like "vidore/colpali-v1.2"
+        model_name = model_choice
+        model_type = "colpali"
+    else:
+        # Default to colpali for backward compatibility
+        model_name = "vidore/colpali-v1.2"
+        model_type = "colpali"
+
+    # Load model based on type
+    attn_implementation = (
+        "flash_attention_2" if (device_str == "cuda" and is_flash_attn_2_available()) else "eager"
+    )
+
+    # Load model from HuggingFace Hub (not Google Drive)
+    # Use local_files_only=False to ensure download from HF if not cached
+    if model_type == "colqwen2.5":
+        model = ColQwen2_5.from_pretrained(
+            model_name,
+            torch_dtype=torch.bfloat16,
+            device_map=device,
+            attn_implementation=attn_implementation,
+            local_files_only=False,  # Ensure download from HuggingFace Hub
+        ).eval()
+        processor = ColQwen2_5_Processor.from_pretrained(model_name, local_files_only=False)
+    elif model_type == "colqwen2":
         model = ColQwen2.from_pretrained(
             model_name,
             torch_dtype=torch.bfloat16,
             device_map=device,
             attn_implementation=attn_implementation,
+            local_files_only=False,  # Ensure download from HuggingFace Hub
         ).eval()
-        processor = ColQwen2Processor.from_pretrained(model_name)
+        processor = ColQwen2Processor.from_pretrained(model_name, local_files_only=False)
-    else:
+    else:  # colpali
-        model_name = "vidore/colpali-v1.2"
         model = ColPali.from_pretrained(
             model_name,
             torch_dtype=torch.bfloat16,
             device_map=device,
+            local_files_only=False,  # Ensure download from HuggingFace Hub
         ).eval()
-        processor = cast(ColPaliProcessor, ColPaliProcessor.from_pretrained(model_name))
+        processor = cast(
+            ColPaliProcessor, ColPaliProcessor.from_pretrained(model_name, local_files_only=False)
+        )
 
     return model_name, model, processor, device_str, device, dtype
 

apps/multimodal/vision-based-pdf-multi-vector/multi-vector-leann-similarity-map.py

@@ -62,7 +62,7 @@ DATASET_NAME: str = "weaviate/arXiv-AI-papers-multi-vector"
 # DATASET_NAMES: Optional[list[str | tuple[str, Optional[str]]]] = None
 DATASET_NAMES = [
     "weaviate/arXiv-AI-papers-multi-vector",
-    ("lmms-lab/DocVQA", "DocVQA"),  # Specify config name for datasets with multiple configs
+    # ("lmms-lab/DocVQA", "DocVQA"),  # Specify config name for datasets with multiple configs
 ]
 # Load multiple splits to get more data (e.g., ["train", "test", "validation"])
 # Set to None to try loading all available splits automatically
@@ -75,6 +75,11 @@ MAX_DOCS: Optional[int] = None  # limit number of pages to index; None = all
 # Local pages (used when USE_HF_DATASET == False)
 PDF: Optional[str] = None  # e.g., "./pdfs/2004.12832v2.pdf"
 PAGES_DIR: str = "./pages"
+# Custom folder path (takes precedence over USE_HF_DATASET and PAGES_DIR)
+# If set, images will be loaded directly from this folder
+CUSTOM_FOLDER_PATH: Optional[str] = None  # e.g., "/home/ubuntu/dr-tulu/agent/screenshots"
+# Whether to recursively search subdirectories when loading from custom folder
+CUSTOM_FOLDER_RECURSIVE: bool = False  # Set to True to search subdirectories
 
 # Index + retrieval settings
 # Use a different index path for larger dataset to avoid overwriting existing index
@@ -83,7 +88,7 @@ INDEX_PATH: str = "./indexes/colvision_large.leann"
 # These are now command-line arguments (see CLI overrides section)
 TOPK: int = 3
 FIRST_STAGE_K: int = 500
-REBUILD_INDEX: bool = True
+REBUILD_INDEX: bool = False  # Set to True to force rebuild even if index exists
 
 # Artifacts
 SAVE_TOP_IMAGE: Optional[str] = "./figures/retrieved_page.png"
@@ -128,12 +133,33 @@ parser.add_argument(
     default=TOPK,
     help=f"Number of top results to retrieve. Default: {TOPK}",
 )
+parser.add_argument(
+    "--custom-folder",
+    type=str,
+    default=None,
+    help="Path to a custom folder containing images to search. Takes precedence over dataset loading. Default: None",
+)
+parser.add_argument(
+    "--recursive",
+    action="store_true",
+    default=False,
+    help="Recursively search subdirectories when loading images from custom folder. Default: False",
+)
+parser.add_argument(
+    "--rebuild-index",
+    action="store_true",
+    default=False,
+    help="Force rebuild the index even if it already exists. Default: False (reuse existing index if available)",
+)
 cli_args, _unknown = parser.parse_known_args()
 SEARCH_METHOD: str = cli_args.search_method
 QUERY = cli_args.query  # Override QUERY with CLI argument if provided
 USE_FAST_PLAID: bool = cli_args.use_fast_plaid
 FAST_PLAID_INDEX_PATH: str = cli_args.fast_plaid_index_path
 TOPK: int = cli_args.topk  # Override TOPK with CLI argument if provided
+CUSTOM_FOLDER_PATH = cli_args.custom_folder if cli_args.custom_folder else CUSTOM_FOLDER_PATH  # Override with CLI argument if provided
+CUSTOM_FOLDER_RECURSIVE = cli_args.recursive if cli_args.recursive else CUSTOM_FOLDER_RECURSIVE  # Override with CLI argument if provided
+REBUILD_INDEX = cli_args.rebuild_index  # Override REBUILD_INDEX with CLI argument
 
 # %%
 
@@ -180,7 +206,23 @@ else:
 # Step 2: Load data only if we need to build the index
 if need_to_build_index:
     print("Loading dataset...")
-    if USE_HF_DATASET:
+    # Check for custom folder path first (takes precedence)
+    if CUSTOM_FOLDER_PATH:
+        if not os.path.isdir(CUSTOM_FOLDER_PATH):
+            raise RuntimeError(f"Custom folder path does not exist: {CUSTOM_FOLDER_PATH}")
+        print(f"Loading images from custom folder: {CUSTOM_FOLDER_PATH}")
+        if CUSTOM_FOLDER_RECURSIVE:
+            print("  (recursive mode: searching subdirectories)")
+        filepaths, images = _load_images_from_dir(CUSTOM_FOLDER_PATH, recursive=CUSTOM_FOLDER_RECURSIVE)
+        print(f"  Found {len(filepaths)} image files")
+        if not images:
+            raise RuntimeError(
+                f"No images found in {CUSTOM_FOLDER_PATH}. Ensure the folder contains image files (.png, .jpg, .jpeg, .webp)."
+            )
+        print(f"  Successfully loaded {len(images)} images")
+        # Use filenames as identifiers instead of full paths for cleaner metadata
+        filepaths = [os.path.basename(fp) for fp in filepaths]
+    elif USE_HF_DATASET:
         from datasets import load_dataset, concatenate_datasets, DatasetDict
 
         # Determine which datasets to load
@@ -621,7 +663,6 @@ else:
             except Exception:
                 print(f"Saved retrieved page (rank {rank}) to: {out_path}")
 
-## TODO stange results of second page of DeepSeek-V2 rather than the first page
 
 # %%
 # Step 6: Similarity maps for top-K results

apps/multimodal/vision-based-pdf-multi-vector/vidore_v1_benchmark.py

@@ -90,6 +90,51 @@ VIDORE_V1_TASKS = {
     },
 }
 
+# Task name aliases (short names -> full names)
+TASK_ALIASES = {
+    "arxivqa": "VidoreArxivQARetrieval",
+    "docvqa": "VidoreDocVQARetrieval",
+    "infovqa": "VidoreInfoVQARetrieval",
+    "tabfquad": "VidoreTabfquadRetrieval",
+    "tatdqa": "VidoreTatdqaRetrieval",
+    "shiftproject": "VidoreShiftProjectRetrieval",
+    "syntheticdocqa_ai": "VidoreSyntheticDocQAAIRetrieval",
+    "syntheticdocqa_energy": "VidoreSyntheticDocQAEnergyRetrieval",
+    "syntheticdocqa_government": "VidoreSyntheticDocQAGovernmentReportsRetrieval",
+    "syntheticdocqa_healthcare": "VidoreSyntheticDocQAHealthcareIndustryRetrieval",
+}
+
+
+def normalize_task_name(task_name: str) -> str:
+    """Normalize task name (handle aliases)."""
+    task_name_lower = task_name.lower()
+    if task_name in VIDORE_V1_TASKS:
+        return task_name
+    if task_name_lower in TASK_ALIASES:
+        return TASK_ALIASES[task_name_lower]
+    # Try partial match
+    for alias, full_name in TASK_ALIASES.items():
+        if alias in task_name_lower or task_name_lower in alias:
+            return full_name
+    return task_name
+
+
+def get_safe_model_name(model_name: str) -> str:
+    """Get a safe model name for use in file paths."""
+    import hashlib
+    import os
+
+    # If it's a path, use basename or hash
+    if os.path.exists(model_name) and os.path.isdir(model_name):
+        # Use basename if it's reasonable, otherwise use hash
+        basename = os.path.basename(model_name.rstrip("/"))
+        if basename and len(basename) < 100 and not basename.startswith("."):
+            return basename
+        # Use hash for very long or problematic paths
+        return hashlib.md5(model_name.encode()).hexdigest()[:16]
+    # For HuggingFace model names, replace / with _
+    return model_name.replace("/", "_").replace(":", "_")
+
 
 def load_vidore_v1_data(
     dataset_path: str,
@@ -181,6 +226,9 @@ def evaluate_task(
     print(f"Evaluating task: {task_name}")
     print(f"{'=' * 80}")
 
+    # Normalize task name (handle aliases)
+    task_name = normalize_task_name(task_name)
+
     # Get task config
     if task_name not in VIDORE_V1_TASKS:
         raise ValueError(f"Unknown task: {task_name}. Available: {list(VIDORE_V1_TASKS.keys())}")
@@ -223,11 +271,13 @@ def evaluate_task(
     )
 
     # Build or load index
+    # Use safe model name for index path (different models need different indexes)
+    safe_model_name = get_safe_model_name(model_name)
     index_path_full = index_path if not use_fast_plaid else fast_plaid_index_path
     if index_path_full is None:
-        index_path_full = f"./indexes/{task_name}_{model_name}"
+        index_path_full = f"./indexes/{task_name}_{safe_model_name}"
         if use_fast_plaid:
-            index_path_full = f"./indexes/{task_name}_{model_name}_fastplaid"
+            index_path_full = f"./indexes/{task_name}_{safe_model_name}_fastplaid"
 
     index_or_retriever, corpus_ids_ordered = evaluator.build_index_from_corpus(
         corpus=corpus,
@@ -281,8 +331,7 @@ def main():
         "--model",
         type=str,
         default="colqwen2",
-        choices=["colqwen2", "colpali"],
+        help="Model to use: 'colqwen2', 'colpali', or path to a model directory (supports LoRA adapters)",
-        help="Model to use",
     )
     parser.add_argument(
         "--task",
@@ -350,11 +399,11 @@ def main():
 
     # Determine tasks to evaluate
     if args.task:
-        tasks_to_eval = [args.task]
+        tasks_to_eval = [normalize_task_name(args.task)]
     elif args.tasks.lower() == "all":
         tasks_to_eval = list(VIDORE_V1_TASKS.keys())
     else:
-        tasks_to_eval = [t.strip() for t in args.tasks.split(",")]
+        tasks_to_eval = [normalize_task_name(t.strip()) for t in args.tasks.split(",")]
 
     print(f"Tasks to evaluate: {tasks_to_eval}")
 

docs/configuration-guide.md

@@ -454,7 +454,7 @@ leann search my-index "your query" \
 
 ### 2) Run remote builds with SkyPilot (cloud GPU)
 
-Offload embedding generation and index building to a GPU VM using [SkyPilot](https://skypilot.readthedocs.io/en/latest/). A template is provided at `sky/leann-build.yaml`.
+Offload embedding generation and index building to a GPU VM using [SkyPilot](https://docs.skypilot.co/en/latest/docs/index.html). A template is provided at `sky/leann-build.yaml`.
 
 ```bash
 # One-time: install and configure SkyPilot

packages/leann-core/src/leann/api.py

@@ -1251,15 +1251,15 @@ class LeannChat:
             "Please provide the best answer you can based on this context and your knowledge."
         )
 
-        print("The context provided to the LLM is:")
+        logger.info("The context provided to the LLM is:")
-        print(f"{'Relevance':<10} | {'Chunk id':<10} | {'Content':<60} | {'Source':<80}")
+        logger.info(f"{'Relevance':<10} | {'Chunk id':<10} | {'Content':<60} | {'Source':<80}")
-        print("-" * 150)
+        logger.info("-" * 150)
         for r in results:
             chunk_relevance = f"{r.score:.3f}"
             chunk_id = r.id
             chunk_content = r.text[:60]
             chunk_source = r.metadata.get("source", "")[:80]
-            print(
+            logger.info(
                 f"{chunk_relevance:<10} | {chunk_id:<10} | {chunk_content:<60} | {chunk_source:<80}"
             )
         ask_time = time.time()

packages/leann-core/src/leann/chat.py

@@ -12,7 +12,13 @@ from typing import Any, Optional
 
 import torch
 
-from .settings import resolve_ollama_host, resolve_openai_api_key, resolve_openai_base_url
+from .settings import (
+    resolve_anthropic_api_key,
+    resolve_anthropic_base_url,
+    resolve_ollama_host,
+    resolve_openai_api_key,
+    resolve_openai_base_url,
+)
 
 # Configure logging
 logging.basicConfig(level=logging.INFO)
@@ -845,6 +851,81 @@ class OpenAIChat(LLMInterface):
             return f"Error: Could not get a response from OpenAI. Details: {e}"
 
 
+class AnthropicChat(LLMInterface):
+    """LLM interface for Anthropic Claude models."""
+
+    def __init__(
+        self,
+        model: str = "claude-haiku-4-5",
+        api_key: Optional[str] = None,
+        base_url: Optional[str] = None,
+    ):
+        self.model = model
+        self.base_url = resolve_anthropic_base_url(base_url)
+        self.api_key = resolve_anthropic_api_key(api_key)
+
+        if not self.api_key:
+            raise ValueError(
+                "Anthropic API key is required. Set ANTHROPIC_API_KEY environment variable or pass api_key parameter."
+            )
+
+        logger.info(
+            "Initializing Anthropic Chat with model='%s' and base_url='%s'",
+            model,
+            self.base_url,
+        )
+
+        try:
+            import anthropic
+
+            # Allow custom Anthropic-compatible endpoints via base_url
+            self.client = anthropic.Anthropic(
+                api_key=self.api_key,
+                base_url=self.base_url,
+            )
+        except ImportError:
+            raise ImportError(
+                "The 'anthropic' library is required for Anthropic models. Please install it with 'pip install anthropic'."
+            )
+
+    def ask(self, prompt: str, **kwargs) -> str:
+        logger.info(f"Sending request to Anthropic with model {self.model}")
+
+        try:
+            # Anthropic API parameters
+            params = {
+                "model": self.model,
+                "max_tokens": kwargs.get("max_tokens", 1000),
+                "messages": [{"role": "user", "content": prompt}],
+            }
+
+            # Add optional parameters
+            if "temperature" in kwargs:
+                params["temperature"] = kwargs["temperature"]
+            if "top_p" in kwargs:
+                params["top_p"] = kwargs["top_p"]
+
+            response = self.client.messages.create(**params)
+
+            # Extract text from response
+            response_text = response.content[0].text
+
+            # Log token usage
+            print(
+                f"Total tokens = {response.usage.input_tokens + response.usage.output_tokens}, "
+                f"input tokens = {response.usage.input_tokens}, "
+                f"output tokens = {response.usage.output_tokens}"
+            )
+
+            if response.stop_reason == "max_tokens":
+                print("The query is exceeding the maximum allowed number of tokens")
+
+            return response_text.strip()
+        except Exception as e:
+            logger.error(f"Error communicating with Anthropic: {e}")
+            return f"Error: Could not get a response from Anthropic. Details: {e}"
+
+
 class SimulatedChat(LLMInterface):
     """A simple simulated chat for testing and development."""
 
@@ -897,6 +978,12 @@ def get_llm(llm_config: Optional[dict[str, Any]] = None) -> LLMInterface:
         )
     elif llm_type == "gemini":
         return GeminiChat(model=model or "gemini-2.5-flash", api_key=llm_config.get("api_key"))
+    elif llm_type == "anthropic":
+        return AnthropicChat(
+            model=model or "claude-3-5-sonnet-20241022",
+            api_key=llm_config.get("api_key"),
+            base_url=llm_config.get("base_url"),
+        )
     elif llm_type == "simulated":
         return SimulatedChat()
     else:

packages/leann-core/src/leann/cli.py

@@ -11,7 +11,12 @@ from tqdm import tqdm
 from .api import LeannBuilder, LeannChat, LeannSearcher
 from .interactive_utils import create_cli_session
 from .registry import register_project_directory
-from .settings import resolve_ollama_host, resolve_openai_api_key, resolve_openai_base_url
+from .settings import (
+    resolve_anthropic_base_url,
+    resolve_ollama_host,
+    resolve_openai_api_key,
+    resolve_openai_base_url,
+)
 
 
 def extract_pdf_text_with_pymupdf(file_path: str) -> str:
@@ -291,7 +296,7 @@ Examples:
             "--llm",
             type=str,
             default="ollama",
-            choices=["simulated", "ollama", "hf", "openai"],
+            choices=["simulated", "ollama", "hf", "openai", "anthropic"],
             help="LLM provider (default: ollama)",
         )
         ask_parser.add_argument(
@@ -341,7 +346,7 @@ Examples:
             "--api-key",
             type=str,
             default=None,
-            help="API key for OpenAI-compatible APIs (defaults to OPENAI_API_KEY)",
+            help="API key for cloud LLM providers (OpenAI, Anthropic)",
         )
 
         # List command
@@ -1616,6 +1621,12 @@ Examples:
             resolved_api_key = resolve_openai_api_key(args.api_key)
             if resolved_api_key:
                 llm_config["api_key"] = resolved_api_key
+        elif args.llm == "anthropic":
+            # For Anthropic, pass base_url and API key if provided
+            if args.api_base:
+                llm_config["base_url"] = resolve_anthropic_base_url(args.api_base)
+            if args.api_key:
+                llm_config["api_key"] = args.api_key
 
         chat = LeannChat(index_path=index_path, llm_config=llm_config)
 

packages/leann-core/src/leann/settings.py

@@ -9,6 +9,7 @@ from typing import Any
 # Default fallbacks to preserve current behaviour while keeping them in one place.
 _DEFAULT_OLLAMA_HOST = "http://localhost:11434"
 _DEFAULT_OPENAI_BASE_URL = "https://api.openai.com/v1"
+_DEFAULT_ANTHROPIC_BASE_URL = "https://api.anthropic.com"
 
 
 def _clean_url(value: str) -> str:
@@ -52,6 +53,23 @@ def resolve_openai_base_url(explicit: str | None = None) -> str:
     return _clean_url(_DEFAULT_OPENAI_BASE_URL)
 
 
+def resolve_anthropic_base_url(explicit: str | None = None) -> str:
+    """Resolve the base URL for Anthropic-compatible services."""
+
+    candidates = (
+        explicit,
+        os.getenv("LEANN_ANTHROPIC_BASE_URL"),
+        os.getenv("ANTHROPIC_BASE_URL"),
+        os.getenv("LOCAL_ANTHROPIC_BASE_URL"),
+    )
+
+    for candidate in candidates:
+        if candidate:
+            return _clean_url(candidate)
+
+    return _clean_url(_DEFAULT_ANTHROPIC_BASE_URL)
+
+
 def resolve_openai_api_key(explicit: str | None = None) -> str | None:
     """Resolve the API key for OpenAI-compatible services."""
 
@@ -61,6 +79,15 @@ def resolve_openai_api_key(explicit: str | None = None) -> str | None:
     return os.getenv("OPENAI_API_KEY")
 
 
+def resolve_anthropic_api_key(explicit: str | None = None) -> str | None:
+    """Resolve the API key for Anthropic services."""
+
+    if explicit:
+        return explicit
+
+    return os.getenv("ANTHROPIC_API_KEY")
+
+
 def encode_provider_options(options: dict[str, Any] | None) -> str | None:
     """Serialize provider options for child processes."""
 

packages/leann-mcp/README.md

@@ -53,6 +53,11 @@ leann build my-project --docs $(git ls-files)
 # Start Claude Code
 claude
 ```
+**Performance tip**: For maximum speed when storage space is not a concern, add the `--no-recompute` flag to your build command. This materializes all tensors and stores them on disk, avoiding recomputation on subsequent builds:
+
+```bash
+leann build my-project --docs $(git ls-files) --no-recompute
+```
 
 ## 🚀 Advanced Usage Examples to build the index