Text to Speech

# Cartesia
export CARTESIA_API_KEY=your_key

# Google
export GOOGLE_APPLICATION_CREDENTIALS=/path/to/credentials.json

# Gemini (benchmarks only; STT + TTS via the Gemini API)
export GOOGLE_API_KEY=your_key

# OpenAI
export OPENAI_API_KEY=your_key

# ElevenLabs
export ELEVENLABS_API_KEY=your_key

# Sarvam
export SARVAM_API_KEY=your_key

# Groq
export GROQ_API_KEY=your_key

# Smallest
export SMALLEST_API_KEY=your_key