Source: https://seerepo.com/compare/bojieli/ai-agent-book/vs/janhq/jan
Markdown source: https://seerepo.com/compare/bojieli/ai-agent-book/vs/janhq/jan.md
Description: ai-agent-book and jan share 4 technologies: React, Vite, OpenAI, and PostHog. ai-agent-book is written in Python and jan in Rust.

# ai-agent-book vs jan

ai-agent-book and jan share 4 technologies: React, Vite, OpenAI, and PostHog. ai-agent-book is written in Python and jan in Rust.

- [bojieli/ai-agent-book](https://seerepo.com/r/bojieli/ai-agent-book): 《深入理解 AI Agent：设计原理与工程实践》（李博杰 著）开源主仓库：全书正文、编译版 PDF 与按章配套代码
- [janhq/jan](https://seerepo.com/r/janhq/jan): Jan is an open source alternative to ChatGPT that runs 100% offline on your computer.

## What they share and what sets them apart

- In common: React, Vite, OpenAI, PostHog
- Only in ai-agent-book: Next.js, Astro, Express, FastAPI, Postgres, Anthropic, Google
- Only in jan: None

## Side by side

| | ai-agent-book | jan |
|---|---|---|
| Size | 422,452 lines written, 1,079 code files | 423,916 lines written, 857 code files |
| Who writes it | 20.8% of its commits signed by AI. With Claude Code | 0.6% of its commits signed by AI. With GitHub Copilot, Claude Code, Cursor, Factory, Jules, and Aider |
| Activity | Last push October 8, 2026, 1,610 commits, 56,633 stars | Last push October 30, 2026, 7,424 commits, 45,184 stars |
| Tests | 624 test files. 33.9% of its code files have a test that imports them | 460 test files. 48.9% of its code files have a test that imports them |

- Size: Lines written by people and agents, without generated ones; code files, without tests.
- Who writes it: A commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
- Activity: From GitHub and its history, on the day SeeRepo read it.
- Tests: The files that test the code, and the share of code files a test imports.

## Frequently asked questions

### Which is bigger, ai-agent-book or jan?

jan, with 423,916 lines written in 857 code files; ai-agent-book has 422,452 in 1,079.

The proof: [janhq/jan's code at commit b8071a1](https://github.com/janhq/jan/tree/b8071a116d626875df346616ddb547b27ab3ef5c)

### Which has more GitHub stars, ai-agent-book or jan?

ai-agent-book, with 56,633 stars; jan has 45,184.

The proof: [bojieli/ai-agent-book on GitHub](https://github.com/bojieli/ai-agent-book)

### Which has more tests, ai-agent-book or jan?

ai-agent-book, with 624 test files; jan has 460.

The proof: [bojieli/ai-agent-book's code at commit dbc046e](https://github.com/bojieli/ai-agent-book/tree/dbc046eb896ac4e39aa19c7774c8bf49583b89a6)

### Which was updated more recently, ai-agent-book or jan?

jan: its last push was on October 30, 2026, and ai-agent-book's on October 8, 2026.

The proof: [janhq/jan's commits on GitHub](https://github.com/janhq/jan/commits)

### Which has more commits signed by AI, ai-agent-book or jan?

ai-agent-book: an AI signed 20.8% of its commits, with Claude Code; in jan, 0.6%.

The proof: [the commits each tool signed in bojieli/ai-agent-book](https://seerepo.com/r/bojieli/ai-agent-book/ai)

## Sources

- bojieli/ai-agent-book: Read on October 30, 2026, at commit dbc046e (https://github.com/bojieli/ai-agent-book/tree/dbc046eb896ac4e39aa19c7774c8bf49583b89a6)
- janhq/jan: Read on October 31, 2026, at commit b8071a1 (https://github.com/janhq/jan/tree/b8071a116d626875df346616ddb547b27ab3ef5c)

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.