Related Products
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About
Get the full picture of your model's performance. Log inputs and outputs and seamlessly enrich them with metadata and user feedback.
Figure out how your model is really working, and where you can improve. Monitor for errors and discover underperforming cohorts and use cases.
The best models are built on user data. Programmatically gather unusual or underperforming examples to retrain your model.
Stop manually reviewing thousands of outputs when changing your prompt or model. Evaluate your LLM-powered apps programmatically.
Detect and fix degradations quickly. Monitor new deployments in real-time and seamlessly edit the version of your app your users interact with.
Connect your self-hosted or third-party model and your existing data sources.
Process enterprise-scale data with our serverless streaming dataflow engine.
Gantry is SOC-2 compliant and built with enterprise-grade authentication.
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About
Spanlens is an open-source (MIT) LLM observability platform that lets developers monitor every call their application makes to OpenAI, Anthropic, Gemini, Mistral, OpenRouter, Azure OpenAI, or a local Ollama model. Integration takes one line: swap your client's baseURL to the Spanlens proxy, or run "npx @spanlens/cli init" and the wizard rewrites your code automatically. From that moment, every request is recorded with its model, token counts, latency, cost, and full prompt and response body, with streaming responses reconstructed automatically.
The dashboard turns that raw log into operational insight. Cost tracking breaks spend down per request, per model, and per end user, and parses prompt-cache tokens separately so you see real cache savings rather than sticker price. Agent tracing visualizes multi-step workflows as Gantt waterfalls and node-and-edge graphs, highlighting the critical path so you can find the slowest dependency chain in a fan-out.
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Platforms Supported
Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook
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Platforms Supported
Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook
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Audience
AI developers
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Audience
Open-source LLM observability: log cost, latency, tokens, and agent traces for every OpenAI
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Support
Phone Support
24/7 Live Support
Online
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Support
Phone Support
24/7 Live Support
Online
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API
Offers API
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API
Offers API
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Screenshots and Videos |
Screenshots and VideosNo images available
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Pricing
No information available.
Free Version
Free Trial
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Pricing
No information available.
Free Version
Free Trial
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Reviews/
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Reviews/
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Training
Documentation
Webinars
Live Online
In Person
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Training
Documentation
Webinars
Live Online
In Person
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Company InformationGantry
Founded: 2020
United States
www.gantry.io
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Company InformationSpanlens
Founded: 2026
South Korea
spanlens.io
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Categories |
Categories |
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Integrations
No info available.
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Integrations
No info available.
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