I work with OpenAI (GPT-4o, o3), Anthropic Claude, and open-source models. For knowledge-grounded features, I build RAG pipelines with vector search (pgvector, Pinecone, Weaviate). For autonomous workflows, I build multi-step AI agents using function calling, tool use, and orchestration frameworks (LangChain, LlamaIndex, or custom). I handle streaming responses, prompt engineering, and cost optimisation — all exposed through a clean API your team can maintain.