Gemini 2.0 Flash Update Summary

Overview

Updated all DSPex examples and documentation to use Gemini 2.0 Flash (google/gemini-2.0-flash-exp) as the default language model.

Changes Made

1. Example Files Updated

All example files in /examples/dspy/ now:

• Check for GOOGLE_API_KEY or GEMINI_API_KEY environment variables
• Configure Gemini 2.0 Flash as the default LM
• Provide clear instructions when API key is missing
• Fall back to mock mode without API key

Files updated:

• 00_dspy_mock_demo.exs
• 01_question_answering_pipeline.exs
• 02_code_generation_system.exs
• 03_document_analysis_rag.exs
• 04_optimization_showcase.exs

2. Documentation Updated

• README.md: Updated quick start examples to use Gemini
• README_DSPY_INTEGRATION.md: Added Gemini as primary example
• examples/dspy/README.md: Complete Gemini setup instructions

3. Key Benefits of Gemini 2.0 Flash

• Fast response times - Optimized for speed
• Free tier available - Get started without cost
• Multimodal support - Text, images, and more
• Latest model - Google’s newest and most capable Flash model

Setup Instructions

1. Get a free API key at: https://makersuite.google.com/app/apikey

2. Set the environment variable:

export GOOGLE_API_KEY=your-gemini-api-key
# or
export GEMINI_API_KEY=your-gemini-api-key

3. Install Python dependencies:

pip install dspy-ai litellm msgpack google-generativeai

4. Run any example:

mix run examples/dspy/00_dspy_mock_demo.exs

Example Configuration

# Automatic configuration when environment variable is set
api_key = System.get_env("GOOGLE_API_KEY") || System.get_env("GEMINI_API_KEY")
if api_key do
  DSPex.LM.configure("google/gemini-2.0-flash-exp", api_key: api_key)
end

Compatibility

• All existing DSPex functionality works with Gemini
• Other LLM providers (OpenAI, Anthropic) still supported
• Examples demonstrate Gemini first, then other options