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What is Spanlens?

Spanlens is an open-source observability tool under the MIT license that allows developers to seamlessly monitor their applications' interactions with various services, including OpenAI, Anthropic, and others. The integration is remarkably straightforward; developers can either modify the client's baseURL to point to the Spanlens proxy with a single line of code or use the command "npx @spanlens/cli init," which activates a wizard for automatic code adjustments. After integration, the platform logs all requests in detail, tracking essential metrics such as model type, token counts, latency, costs, and the entire prompt and response body, while also effectively reconstructing streaming outputs. The platform's dashboard converts this extensive log information into valuable operational insights. With cost tracking capabilities, users can analyze their spending by specific requests, models, and users, along with differentiating prompt-cache tokens to clarify actual savings beyond total costs. Furthermore, agent tracing illustrates multi-step workflows through Gantt waterfalls and node-and-edge graphs, highlighting critical paths to help developers identify the slowest dependencies in complex scenarios. This thorough approach not only improves visibility but also equips users with the tools necessary to refine their model interactions for enhanced efficiency and effective cost management, fostering a more productive development environment overall.

What is ChainForge?

ChainForge is a versatile open-source visual programming platform designed to improve prompt engineering and the evaluation of large language models. It empowers users to thoroughly test the effectiveness of their prompts and text-generation models, surpassing simple anecdotal evaluations. By allowing simultaneous experimentation with various prompt concepts and their iterations across multiple LLMs, users can identify the most effective combinations. Moreover, it evaluates the quality of responses generated by different prompts, models, and configurations to pinpoint the optimal setup for specific applications. Users can establish evaluation metrics and visualize results across prompts, parameters, models, and configurations, thus fostering a data-driven methodology for informed decision-making. The platform also supports the management of multiple conversations concurrently, offers templating for follow-up messages, and permits the review of outputs at each interaction to refine communication strategies. Additionally, ChainForge is compatible with a wide range of model providers, including OpenAI, HuggingFace, Anthropic, Google PaLM2, Azure OpenAI endpoints, and even locally hosted models like Alpaca and Llama. Users can easily adjust model settings and utilize visualization nodes to gain deeper insights and improve outcomes. Overall, ChainForge stands out as a robust tool specifically designed for prompt engineering and LLM assessment, fostering a culture of innovation and efficiency while also being user-friendly for individuals at various expertise levels.

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Integrations Supported

Azure OpenAI Service
ChatGPT
Claude
Hugging Face
OpenAI

Integrations Supported

Azure OpenAI Service
ChatGPT
Claude
Hugging Face
OpenAI

API Availability

Has API

API Availability

Has API

Pricing Information

Pricing not provided.
Free Trial Offered?
Free Version

Pricing Information

Pricing not provided.
Free Trial Offered?
Free Version

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Spanlens

Date Founded

2026

Company Location

South Korea

Company Website

spanlens.io

Company Facts

Organization Name

ChainForge

Company Location

United States

Company Website

chainforge.ai/

Categories and Features

Categories and Features

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