Ship AI Apps With
Fewer Surprises
Debug prompts, run tests, and observe what’s happening in production.
Speed up your AI development workflow with Langtail.
Playground
Debug prompts
- Iterate at Lightning Speed
- Fine-tune prompts and settings to optimize your LLM's performance in record time.
- Use advanced features
- Support for variables, tools (functions), vision and more built right in.
- Instant Feedback Loop
- See how prompt changes affect your AI's output instantly.
- Version History
- Roll back to previous prompt versions with full version history.
Testing
Run tests
- Prevent surprises
- Modify your prompts and rely on your test suite to ensure that you aren't breaking your app, rather than using manual testing.
- Benchmark prompt variations
- Run tests on different prompt versions to identify the top-performing one.
- Upgrade models with confidence
- Ensure your app's stability when moving to new model versions by leveraging your test suite.
Deployment
Deploy prompts
- Iterate faster
- Publish your prompts as API endpoints, allowing you to make changes without redeploying your entire application.
- Fit your development workflow
- Deploy prompts to separate preview, staging, and production environments to keep everything aligned with the way your team ships.
- Decouple prompts from code
- Separate prompt development from app development, enabling your team to work more independently and efficiently.
Monitoring
Monitor Production
- Detailed API Logging
- Capture performance data, token count, and LLM costs for every API call to the LLM.
- Metrics Dashboard
- View aggregated prompt performance metrics including request count, cost, and latency.
- Problem Detection
- Identify issues by monitoring user interactions with your app in production.
Testimonials
Engineering and AI teams Langtail
“Langtail simplifies the development and testing of Deepnote AI, enabling our team to focus on further integrating AI features into our product”
Ondřej Romancov
Software Engineer at Deepnote
“If you're continuously optimizing your LLMs and not using a logging solution, you're seriously missing out. As a prompt engineer, I absolutely love the freedom to test whatever I want independently of the backend team. And finally, we see this within a quality user interface.”
Yiğit Konur
Head of AI at Wope
Ready to upgrade your AI dev workflow?
Langtail is the most enjoyable way to debug, test, and observe LLM-powered apps. Try it for free, no credit card needed.