Playground
FREE
- 1 user
- Local data storage
- OpenAI models
- Stats & Insights
- Data import / export
- Community support
Overview
Promptmetheus is an integrated development environment (IDE) specifically designed for prompt engineering. It enables users to compose structured prompts using text and data blocks, facilitating rapid iteration through different versions with block variants. The platform includes automatic evaluators that can be configured to validate LLM completions against specified requirements, ensuring output quality and robustness.
Users can organize dynamic context, such as user input or retrieved data, into test datasets and inject them into prompts via data blocks for comprehensive testing. The tool supports testing prompts with over 150 large language models from 15+ providers, allowing experimentation with various model parameters to achieve optimal results. Key features include project organization for prompts, datasets, and completions, a model catalog, prompt variables for flexible details, and completion ratings to visualize performance. It also offers full traceability with detailed versioning and changelogs, cost calculation for inference, real-time synchronization across devices, and data export capabilities in multiple formats.
Key features
- Prompt composition with block variants
- Automatic evaluators for completion validation
- Test datasets for dynamic context injection
- Support for 150+ LLMs and 15+ providers
- Full traceability with versioning and changelogs
- Cost calculation for inference
- Real-time sync and data export
- Model catalog and prompt variables
Who uses it
Users building AI automations, agents, and workflows.
Pros
- Comprehensive prompt composition and iteration features.
- Automated evaluation of LLM completions.
- Extensive support for over 150 LLMs from multiple providers.
- Detailed versioning and traceability for prompt design workflows.
- Cost estimation for LLM inference.
Cons
- Requires users to provide their own API keys for LLM inference, as subscriptions do not include a budget.
- No explicit mention of native mobile or desktop applications.
- The free tier offers limited features compared to paid plans.
Our take
Promptmetheus provides a structured environment for developing and refining LLM prompts, offering tools for testing, evaluation, and version control. It serves as a dedicated workspace for optimizing AI interactions across various models and applications.
Pricing plans
Single
$29/month
- Prompt IDE
- 1 user
- Cloud sync between devices
- 15 providers and 150+ models
- Multiple projects
- Automatic evaluators
- Prompt history and full traceability
- Stats & Insights
- Data export
- Dedicated support
Team
$99/month
- Prompt IDE
- 3 users included
- All Single features, plus
- User management
- Shared workspace with real-time collaboration
- Business support
Pricing details are provided for reference and may differ from the vendor's current plans.
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