Source: https://seerepo.com/compare/comet-ml/opik/vs/rohitg00/ai-engineering-from-scratch
Markdown source: https://seerepo.com/compare/comet-ml/opik/vs/rohitg00/ai-engineering-from-scratch.md
Description: opik and ai-engineering-from-scratch share 12 technologies: OpenAI, Anthropic, accelerate, tiktoken, tokenizers, LangChain, transformers, torch, datasets, scikit-learn, pillow, and Zod. Both are written in Python.

# opik vs ai-engineering-from-scratch

opik and ai-engineering-from-scratch share 12 technologies: OpenAI, Anthropic, accelerate, tiktoken, tokenizers, LangChain, transformers, torch, datasets, scikit-learn, pillow, and Zod. Both are written in Python.

- [comet-ml/opik](https://seerepo.com/r/comet-ml/opik): Debug, evaluate, and monitor your LLM applications, RAG systems, and agentic workflows with comprehensive tracing, automated evaluations, and production-ready dashboards.
- [rohitg00/ai-engineering-from-scratch](https://seerepo.com/r/rohitg00/ai-engineering-from-scratch): Learn AI Engineering! Learn it. Build it. Ship it for others.

## What they share and what sets them apart

- In common: OpenAI, Anthropic, accelerate, tiktoken, tokenizers, LangChain, transformers, torch, datasets, scikit-learn, pillow, Zod
- Only in opik: FastAPI, JAX-RS, Flask, werkzeug, flask-cors, redisson, s3, Redis, MySQL, Sentry, AWS S3, Hugging Face, AIOHTTP, anyio, Vite, React, tanstack, PostHog, Rich, itsdangerous, spaCy, litellm, peft, markdown-it-py, markupsafe, jinja2, annotated-types, referencing, Pydantic, jsonschema, pydantic-core, Gunicorn, OpenTelemetry, opentelemetry-instrumentation-flask, opentelemetry-instrumentation-logging, opentelemetry-instrumentation-requests, opentelemetry-instrumentation-system-metrics, botocore, docker, class-variance-authority, Tailwind CSS, tailwind-merge, React Hook Form, Radix UI, @uiw/react-codemirror, CodeMirror, recharts, dnd-kit, react-hotkeys-hook, react-textarea-autosize, react18-json-view, react-day-picker, cmdk, react-intersection-observer, react-player, @lezer/highlight, Mermaid, re-resizable, react-grid-layout, react-resizable-panels, Vega, vega-lite, Lucide, mustache, react-markdown, remark-breaks, remark-gfm, ansi-to-html, react-pdf, rehype-raw, rehype-sanitize, unist-util-visit, yaml, @hookform/resolvers, ora, ai, @ai-sdk/google, Nunjucks, @clack/prompts, zod-to-json-schema, @opentelemetry/sdk-trace-base
- Only in ai-engineering-from-scratch: Hono, matplotlib, librosa, torchaudio, torchvision, MCP, google-adk, shiki, @hono/node-server, @mastra/core

## Side by side

| | opik | ai-engineering-from-scratch |
|---|---|---|
| Size | 1,680,031 lines written, 7,878 code files | 506,014 lines written, 2,340 code files |
| Who writes it | 19.7% of its commits signed by AI. With Claude Code, GitHub Copilot, and Cursor | 0.8% of its commits signed by AI. With Claude Code and Devin |
| Activity | Last push November 4, 2026, 7,898 commits, 23,166 stars | Last push November 4, 2026, 2,431 commits, 76,859 stars |
| Tests | 2,703 test files. 20.9% of its code files have a test that imports them | 781 test files. 17.3% 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, opik or ai-engineering-from-scratch?

opik, with 1,680,031 lines written; ai-engineering-from-scratch has 506,014.

The proof: [comet-ml/opik's code at commit df61dd2](https://github.com/comet-ml/opik/tree/df61dd21c66e5ed901dafba326bf29cb4b4fbcfb)

### Which has more GitHub stars, opik or ai-engineering-from-scratch?

ai-engineering-from-scratch, with 76,859 stars; opik has 23,166.

The proof: [rohitg00/ai-engineering-from-scratch on GitHub](https://github.com/rohitg00/ai-engineering-from-scratch)

### Which has more tests, opik or ai-engineering-from-scratch?

opik, with 2,703 test files; ai-engineering-from-scratch has 781.

The proof: [comet-ml/opik's code at commit df61dd2](https://github.com/comet-ml/opik/tree/df61dd21c66e5ed901dafba326bf29cb4b4fbcfb)

### Which was updated more recently, opik or ai-engineering-from-scratch?

Both got their last push on November 4, 2026.

The proof: [comet-ml/opik's commits on GitHub](https://github.com/comet-ml/opik/commits)

### Which has more commits signed by AI, opik or ai-engineering-from-scratch?

opik: an AI signed 19.7% of its commits, with Claude Code, GitHub Copilot, and Cursor; in ai-engineering-from-scratch, 0.8%.

The proof: [the commits each tool signed in comet-ml/opik](https://seerepo.com/r/comet-ml/opik/ai)

## Sources

- comet-ml/opik: Read on November 4, 2026, at commit df61dd2 (https://github.com/comet-ml/opik/tree/df61dd21c66e5ed901dafba326bf29cb4b4fbcfb)
- rohitg00/ai-engineering-from-scratch: Read on November 4, 2026, at commit 8fec9cc (https://github.com/rohitg00/ai-engineering-from-scratch/tree/8fec9cc19ee7c73b92582899b5455333d30d718e)

## 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.