Orchestrate every step of your AI agent, from retrieval to reasoning to memory and tool use. Haystack’s modular framework gives you full visibility to inspect, debug, and optimize every decision your AI makes. Connect to OpenAI, Anthropic, Mistral, Hugging Face, Weaviate, Pinecone, Elasticsearch, and more with no vendor lock-in. Haystack’s open architecture lets you mix and match components ...