graflow/.env.example at main · GraflowAI/graflow · GitHub

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# Graflow Environment Variables
# Copy this file to .env and fill in your values

# ============================================================================
# LLM Configuration
# ============================================================================

# Default LLM model for auto-created LLMClient instances
# Used when ExecutionContext.llm_client is accessed without explicit initialization
# Supported models: gpt-5-mini, gpt-4o, claude-3-5-sonnet-20241022, etc.
# Default: gpt-5-mini
GRAFLOW_LLM_MODEL=gpt-5-mini

# ============================================================================
# LLM API Keys
# ============================================================================

# OpenAI API Key (required for GPT models)
# Get your key from: https://platform.openai.com/api-keys
OPENAI_API_KEY=sk-...

# Anthropic API Key (required for Claude models)
# Get your key from: https://console.anthropic.com/
ANTHROPIC_API_KEY=sk-ant-...

# Google AI API Key (required for Gemini models)
# Get your key from: https://ai.google.dev/
GOOGLE_API_KEY=...

# ============================================================================
# Langfuse Tracing (Optional)
# ============================================================================

# Langfuse integration for LLM observability and tracing
# Get your credentials from: https://cloud.langfuse.com or self-hosted instance

# Langfuse public API key (required for Langfuse tracing)
LANGFUSE_PUBLIC_KEY=pk-lf-...

# Langfuse secret API key (required for Langfuse tracing)
LANGFUSE_SECRET_KEY=sk-lf-...

# Langfuse host URL (optional)
# Default: https://cloud.langfuse.com
# Use this if you're running a self-hosted Langfuse instance
# LANGFUSE_HOST=http://localhost:3000

# ============================================================================
# Redis Configuration (Optional - for distributed execution)
# ============================================================================

# Redis connection settings for distributed task queues and channels
# REDIS_HOST=localhost
# REDIS_PORT=6379
# REDIS_DB=0
# REDIS_PASSWORD=

# ============================================================================
# Example-Specific Variables (for examples/gpt_newspaper)
# ============================================================================

# Tavily API Key (for web search in newspaper example)
# Get your key from: https://tavily.com
# TAVILY_API_KEY=tvly-...

# Newspaper example configuration
# GPT_NEWSPAPER_MODEL=gpt-4o-mini
# MAX_CRITIQUE_ITERATIONS=5
# NEWSPAPER_LAYOUT=layout_1.html
# OUTPUT_DIR=outputs