gemini 4 Vertex AI (Gemini) vs OpenAI API: Pricing, Pros, and Cons Compared Jan 24, 2026 Getting Started with gcloud CLI: A Practical Guide Using Document AI Jan 24, 2026 From PDF to Data: A Practical Guide to marker and LLMs Jan 22, 2026 Realtime Models vs STT-LLM-TTS Pipeline: Choosing the Right Architecture for Voice AI Jan 15, 2026