Every Tool You Need to Build an LLM App in 2026 (One List)

The article presents a curated, production-ready LLM tool stack for 2026, covering five key categories: inference (vLLM or Groq), vector DB (pgvector), framework (direct API usage over LangChain), monitoring (Langfuse), and testing (Promptfoo). The author compiled 50+ tools across categories like fine-tuning, deployment, and cost optimization, emphasizing simplicity and avoiding unnecessary complexity in production LLM applications.