Ship your LLM Agents with confidence
The all-in-one observability & evaluation platform for LLM agents and workflows. Monitor, debug, and improve your multi-step AI applications.
Complete LLM Engineering Platform
Route, monitor, evaluate, and control your LLM applications with intelligent fallbacks and cost management
LLM Routing
Route to any LLM provider seamlessly using the familiar OpenAI SDK interface. Switch between models without changing your code.
Observability
Complete visibility into your LLM applications with detailed logs, traces, and real-time monitoring.
Evaluations
Comprehensive evaluation framework for prompts, workflows, and agents to ensure quality and reliability.
Spend Tracking
Monitor and analyze your LLM costs across all providers with detailed usage analytics and cost breakdowns.
Budgets & Rate Limits
Set and manage budgets and rate limits for different models to control costs and ensure fair usage.
LLM Fallback
Automatic fallback to substitute models when primary LLMs fail due to rate limits or other issues.
Integrate with everything
One SDK that connects seamlessly to your entire AI infrastructure.
Route to any LLM provider seamlessly
One SDK, any provider. Lang Sage acts as your intelligent gateway, routing requests to OpenAI, Anthropic, Google, and more with zero code changes.
User Request
Makes API call
Lang Sage
AI Gateway
OpenAI
GPT-4o, o1
Anthropic
Claude 3.5
Gemini 2.5, Flash, Pro
More
& Growing
OpenAI SDK Compatible
Change providers with a single parameter. No code rewrites, no new SDKs to learn and integrate.
Smart Fallbacks
Automatic failover to backup providers when primary models are unavailable or rate-limited.
Cost Optimization
Route to the most cost-effective provider for each task while maintaining quality standards.
See every step of your AI workflows
Get complete visibility into your LLM applications with detailed traces, logs, and performance metrics. Debug faster, optimize better.
Document Research Pipeline
Real-time Monitoring
Watch your AI workflows execute in real-time with live traces and instant alerts.
Performance Analytics
Deep insights into latency, costs, and success rates across all your AI operations.
Debug with Context
See full request/response payloads, errors, and execution context for every step.
Got questions? We've got answers.
Everything you need to know about Lang Sage and how it can help you monitor your LLM applications.
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