PromptLens

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PromptLens is a comprehensive prompt testing and evaluation platform designed for teams developing applications powered by large language models (LLMs). It enables users to create test cases, conduct evaluations, and share results seamlessly within their teams, ensuring prompt quality and consistency before deployment. By automating regression testing, PromptLens helps identify and address issues early, preventing potential problems from reaching end-users. Key Features and Functionality: - Regression Suites: Develop test datasets with expected outputs and run them on every prompt change to detect regressions before they are deployed. - Quality Scoring: Establish pass/fail thresholds for evaluations, automatically blocking releases that do not meet the defined quality standards. - Prompt & Output Diff: Visualize changes between prompt versions with side-by-side comparisons, highlighting where outputs have altered and identifying potential issues. - Model Matrix: Test prompts across multiple LLM providers, including OpenAI, Anthropic, and Google, to determine the most suitable model for specific use cases. - Shareable Reports: Generate links to evaluation results that can be shared in pull requests, Slack channels, or with stakeholders, allowing for easy review without requiring an account. - Secure API Key Management: Utilize your own API keys, which are encrypted at rest and never logged, ensuring data security and control. Primary Value and User Solutions: PromptLens addresses the common challenge of maintaining prompt quality in LLM-powered applications. By automating the testing process, it eliminates the reliance on manual checks and subjective assessments, reducing the risk of regressions reaching production. This proactive approach ensures that prompt changes do not negatively impact application performance or user experience. Additionally, the platform's ability to test across various models empowers teams to make informed decisions about model selection, optimizing their applications for better results. Overall, PromptLens streamlines the prompt development workflow, enhances collaboration through shareable reports, and upholds high-quality standards in LLM applications.