Building AI Agents with Google Gemini 3 and Open Source Frameworks

This content originally appeared on Google Developers Blog and was authored by Google Developers Blog

Gemini 3 Pro Preview is introduced as a powerful, agentic model for complex, (semi)-autonomous workflows. New agentic features include `thinking_level` for reasoning control, Stateful Tool Use via Thought Signatures, and `media_resolution` for multimodal fidelity. It has Day 0 support for open-source frameworks like LangChain, AI SDK, LlamaIndex, Pydantic AI, and n8n. Best practices include simplifying prompts and keeping temperature at 1.0.

This content originally appeared on Google Developers Blog and was authored by Google Developers Blog