Prompt Lab Overview

Prompt Lab is the engineering workbench of LLMx Prompt Studio. It provides a sophisticated environment for prototyping, debugging, and validating your prompts before they ever reach production.

Unlike simple “playgrounds”, the Lab is designed for rigorous engineering. It simulates your actual production environment—including tool calling, JSON schemas, and streaming—allowing you to build reliability into your AI features from day one.

Core Capabilities

• Rapid Prototyping: Iterate on prompts with real-time feedback using any configured model (OpenAI, Anthropic, Gemini, etc.).
• Tool Mocking: Simulate complex agentic workflows by defining mock tool returns. No backend code required.
• Automated Validation: Define passing criteria and run automated tests using deterministic rules or LLM-as-a-judge.
• Production Parity: Test with the exact same parameters, headers, and schemas that your production API uses.

Getting Started

1. Interface Guide: Master the configuration panel, variable injection, and output analysis.
2. Execution & Mocking: Learn how to run prompts and simulate tool calls.
3. Evaluation & Testing: Set up automated validators to ensure quality.