Promptmetheus

Promptmetheus is a Prompt IDE for AI development. It helps users compose, test, optimize, and collaborate on prompts for LLM-powered applications, agents, and workflows. The IDE breaks prompts into structured blocks (e.g., Context, Task, Instructions, Samples, Primer) for better composability and systematic fine-tuning. It includes tools for evaluating prompts under various conditions, such as datasets for rapid iteration with different inputs, completion ratings, and visual statistics to gauge output quality. The platform supports testing with 15 API providers and over 150 LLMs, including Anthropic, DeepMind, OpenAI, Mistral, Perplexity, xAI, DeepSeek, Cohere, Groq, FetchAI, OpenRouter, AI21 Labs, Venice, MoonshotAI, and Deep Infra. Users can also connect custom models compatible with the OpenAI API or LiteLLM SDK. For teams, shared workspaces enable real-time collaboration and a shared prompt library. Key features include prompt composition, prompt variables, prompt evaluators, a model catalog, projects, test datasets, completion ratings, cost calculation, full traceability (versioning and changelogs), stats and insights, real-time sync, and data export in .txt, .csv, .xlsx, or .json format.

Key Features

• Prompt Composition: Compose structured prompts from sections and iterate through variations.
• Prompt Variables: Define variables at project or prompt level for flexibility.
• Prompt Evaluators: Set up custom evaluators to automatically validate completions.
• Model Catalog: Test with 150+ LLMs and fine-tune parameters.
• Projects: Organize prompts, datasets, and completions with dashboard statistics.
• Test Datasets: Use datasets to simulate dynamic context or user data.
• Completion Ratings: Rate quality and visualize results by model and variant.