Data & diagrams

ChainForge

Send the same prompt to several AI models and compare the answers side by side

Visit official page 日本語で詳しく見る

Popularity

★ 3.0k

Last update

June 2026

License / pricing

MIT

What it does

Runs one prompt across multiple providers at once - ChatGPT, Claude, Gemini and others - and lays the responses out for comparison, including variations of the prompt itself, with scoring to help judge which performs best for your task. You supply the API keys and pay for the calls, which mount up faster than expected when every query fans out to several models, so start small. Everything you type goes to all configured providers.

Summary based on the project's own description. The Japanese page has a fuller beginner guide: setup difficulty, what to prepare, and a step-by-step start.

Screenshots & visuals

Before you start

Setup difficultySome setup needed
Command lineNot required
API keyRequired
Sends data onlineYes

Judged automatically from the project's own metadata. Always confirm on the official page.

ChainForge FAQ

Is ChainForge free?: ChainForge itself is free, but it needs an API key for an external AI service. That service charges separately, though some have a free tier.
Do I need to install anything or write code to use ChainForge?: You install it like a normal desktop app. No command line involved.
Does ChainForge work on a phone?: No. It needs a computer.
Can I use ChainForge commercially?: The licence is MIT, which permits commercial use. Conditions such as keeping the copyright notice still apply, so read the licence text before shipping it inside something.

How it compares

The conditions that decide whether you can actually use it, side by side.

Tool	Command line	API key	Sends data out	Phone	Commercial use
ChainForge (this page)	Not needed	Required	Yes	No	Yes
mermaid	Not needed	Not needed	No	No	Yes
next-ai-draw-io	Not needed	Required	Yes	No	Yes
ml-visuals	Not needed	Not needed	Yes	No	Yes

"Sends data out" means your input is uploaded to someone's server. Pick "No" when the material cannot leave your organisation.

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What it does

Summary based on the project's own description. The Japanese page has a fuller beginner guide: setup difficulty, what to prepare, and a step-by-step start.

ChainForge FAQ

Is ChainForge free?

ChainForge itself is free, but it needs an API key for an external AI service. That service charges separately, though some have a free tier.

Do I need to install anything or write code to use ChainForge?

You install it like a normal desktop app. No command line involved.

Does ChainForge work on a phone?

No. It needs a computer.

Can I use ChainForge commercially?

The licence is MIT, which permits commercial use. Conditions such as keeping the copyright notice still apply, so read the licence text before shipping it inside something.

How it compares

The conditions that decide whether you can actually use it, side by side.

Tool	Command line	API key	Sends data out	Phone	Commercial use
ChainForge (this page)	Not needed	Required	Yes	No	Yes
mermaid	Not needed	Not needed	No	No	Yes
next-ai-draw-io	Not needed	Required	Yes	No	Yes
ml-visuals	Not needed	Not needed	Yes	No	Yes

"Sends data out" means your input is uploaded to someone's server. Pick "No" when the material cannot leave your organisation.