Why Memory Matters for Agents A language model has no persistent memory between API calls. Every request starts fresh from whatever you put in the context window. For a simple Q&A chatbot, this is fine — each turn is mostly self-contained. But for agents that work on multi-step tasks, handle long-running workflows, or serve the … Read more
What Is AI Red Teaming? AI red teaming is the practice of deliberately trying to make your LLM application behave badly — producing harmful outputs, leaking sensitive information, ignoring its instructions, or being manipulated into doing things it should not. The term comes from military and security practice, where a “red team” plays the adversary … Read more
Why Caching Matters for LLM Applications LLM API calls are expensive and slow compared to almost every other operation in a software stack. A single call to a frontier model can cost between a fraction of a cent and several cents, take 1–5 seconds to complete, and involve significant computational overhead on the provider’s side. … Read more
What Is Chain-of-Thought Prompting? Chain-of-thought (CoT) prompting is a technique that instructs a language model to show its reasoning step by step before producing a final answer. Rather than jumping directly to a conclusion, the model works through the problem explicitly — identifying relevant information, applying logic, considering intermediate results — and only then commits … Read more
Why LLM Evaluation Is Hard Evaluating a language model is fundamentally different from evaluating a traditional software system. A classifier has a ground-truth label for every input — you measure accuracy against it. An LLM can produce dozens of valid responses to the same prompt, making “correct” a genuinely ambiguous concept. How do you measure … Read more
What Are Embedding Models? An embedding model converts text — a word, sentence, paragraph, or entire document — into a dense vector of floating-point numbers. That vector is a point in a high-dimensional space, and the key property is that texts with similar meanings end up close together in that space, while texts with different … Read more
What Are AI Guardrails? AI guardrails are the controls you put around an LLM to constrain its behaviour — preventing harmful outputs, enforcing output formats, keeping the model on-topic, and ensuring compliance with your application’s policies. Without guardrails, even a well-prompted model will occasionally produce outputs that are incorrect, off-topic, policy-violating, or unsafe. Guardrails are … Read more
What Is a Context Window? The context window is the total amount of text — measured in tokens — that a language model can see and process at one time. Everything the model uses to generate a response must fit inside it: the system prompt, the conversation history, any documents you have injected, the user’s … Read more
What Is the Model Context Protocol? The Model Context Protocol (MCP) is an open standard introduced by Anthropic in late 2024 that defines how AI applications connect to external tools, data sources, and services. Before MCP, every team building an LLM application had to write custom integration code for each tool they wanted to expose … Read more
What Is Tool Calling? Tool calling — sometimes called function calling — is the mechanism that lets an LLM do more than generate text. Instead of producing only a prose response, a model can emit a structured signal indicating it wants to invoke an external function: search the web, query a database, run a calculation, … Read more
