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"""Anthropic provider implementation.""" |
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import base64 |
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import logging |
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import os |
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from pathlib import Path |
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from typing import Optional |
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import anthropic |
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from dotenv import load_dotenv |
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from video_processor.providers.base import BaseProvider, ModelInfo, ProviderRegistry |
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load_dotenv() |
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logger = logging.getLogger(__name__) |
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class AnthropicProvider(BaseProvider): |
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"""Anthropic Claude API provider.""" |
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provider_name = "anthropic" |
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def __init__(self, api_key: Optional[str] = None): |
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self.api_key = api_key or os.getenv("ANTHROPIC_API_KEY") |
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if not self.api_key: |
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raise ValueError("ANTHROPIC_API_KEY not set") |
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self.client = anthropic.Anthropic(api_key=self.api_key) |
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def chat( |
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self, |
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messages: list[dict], |
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max_tokens: int = 4096, |
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temperature: float = 0.7, |
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model: Optional[str] = None, |
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) -> str: |
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model = model or "claude-haiku-4-5-20251001" |
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# Anthropic requires system messages as a top-level parameter |
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system_parts = [] |
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chat_messages = [] |
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for msg in messages: |
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if msg.get("role") == "system": |
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system_parts.append(msg["content"]) |
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else: |
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chat_messages.append(msg) |
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kwargs = { |
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"model": model, |
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"messages": chat_messages, |
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"max_tokens": max_tokens, |
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"temperature": temperature, |
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} |
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if system_parts: |
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kwargs["system"] = "\n\n".join(system_parts) |
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response = self.client.messages.create(**kwargs) |
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self._last_usage = { |
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"input_tokens": getattr(response.usage, "input_tokens", 0), |
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"output_tokens": getattr(response.usage, "output_tokens", 0), |
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} |
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return response.content[0].text |
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def analyze_image( |
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self, |
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image_bytes: bytes, |
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prompt: str, |
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max_tokens: int = 4096, |
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model: Optional[str] = None, |
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) -> str: |
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model = model or "claude-haiku-4-5-20251001" |
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b64 = base64.b64encode(image_bytes).decode() |
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response = self.client.messages.create( |
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model=model, |
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messages=[ |
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{ |
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"role": "user", |
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"content": [ |
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{ |
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"type": "image", |
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"source": { |
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"type": "base64", |
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"media_type": "image/jpeg", |
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"data": b64, |
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}, |
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}, |
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{"type": "text", "text": prompt}, |
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], |
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} |
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], |
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max_tokens=max_tokens, |
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) |
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self._last_usage = { |
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"input_tokens": getattr(response.usage, "input_tokens", 0), |
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"output_tokens": getattr(response.usage, "output_tokens", 0), |
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} |
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return response.content[0].text |
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def transcribe_audio( |
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self, |
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audio_path: str | Path, |
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language: Optional[str] = None, |
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model: Optional[str] = None, |
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) -> dict: |
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raise NotImplementedError( |
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"Anthropic does not provide a dedicated transcription API. " |
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"Use OpenAI Whisper or Gemini for transcription." |
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) |
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def list_models(self) -> list[ModelInfo]: |
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models = [] |
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try: |
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page = self.client.models.list(limit=100) |
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for m in page.data: |
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mid = m.id |
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caps = ["chat", "vision"] # All Claude models support chat + vision |
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models.append( |
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ModelInfo( |
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id=mid, |
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provider="anthropic", |
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display_name=getattr(m, "display_name", mid), |
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capabilities=caps, |
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) |
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) |
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except Exception as e: |
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logger.warning(f"Failed to list Anthropic models: {e}") |
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return sorted(models, key=lambda m: m.id) |
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ProviderRegistry.register( |
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name="anthropic", |
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provider_class=AnthropicProvider, |
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env_var="ANTHROPIC_API_KEY", |
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model_prefixes=["claude-"], |
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default_models={ |
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"chat": "claude-haiku-4-5-20251001", |
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"vision": "claude-haiku-4-5-20251001", |
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"audio": "", |
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}, |
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) |
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