Source: https://seerepo.com/compare/Aider-AI/aider/vs/dottxt-ai/outlines
Markdown source: https://seerepo.com/compare/Aider-AI/aider/vs/dottxt-ai/outlines.md
Description: aider and outlines share 5 technologies: diskcache, jinja2, pillow, Pydantic, and jsonschema. Both are written in Python.

# aider vs outlines

aider and outlines share 5 technologies: diskcache, jinja2, pillow, Pydantic, and jsonschema. Both are written in Python.

- [Aider-AI/aider](https://seerepo.com/r/Aider-AI/aider): aider is AI pair programming in your terminal
- [dottxt-ai/outlines](https://seerepo.com/r/dottxt-ai/outlines): Structured Outputs

## What they share and what sets them apart

- In common: diskcache, jinja2, pillow, Pydantic, jsonschema
- Only in aider: aiosqlite, gitdb, google-cloud-core, pyarrow, SQLite, Mixpanel, PostHog, AIOHTTP, anyio, asgiref, FastAPI, starlette, tornado, Streamlit, cycler, fonttools, just-the-docs, soupsieve, altair, contourpy, matplotlib, pydeck, Rich, prompt-toolkit, SQLAlchemy, cryptography, Google, llama-index-instrumentation, llama-index-workflows, nltk, OpenAI, safetensors, scikit-learn, sentence-transformers, tiktoken, tokenizers, torch, transformers, litellm, llama-index-core, llama-index-embeddings-huggingface, filetype, imgcat, markdown-it-py, markupsafe, mdurl, tinytag, beautifulsoup4, pypandoc, annotated-types, jsonschema-specifications, marshmallow, referencing, psutil
- Only in outlines: mkdocs-material, outlines-core, genson

## Side by side

| | aider | outlines |
|---|---|---|
| Size | 41,407 lines written, 93 code files | 26,890 lines written, 46 code files |
| Who writes it | 89.5% of its commits signed by AI. With Aider, Gemini CLI, Codex, and Claude Code | 0.8% of its commits signed by AI. With Claude Code and GitHub Copilot |
| Activity | Last push May 22, 2026, 12,461 commits, 50,047 stars | Last push September 21, 2026, 1,324 commits, 16,005 stars |
| Tests | 57 test files. 36.6% of its code files have a test that imports them | 59 test files. 84.8% 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, aider or outlines?

aider, with 41,407 lines written; outlines has 26,890.

The proof: [Aider-AI/aider's code at commit 5dc9490](https://github.com/Aider-AI/aider/tree/5dc9490bb35f9729ef2c95d00a19ccd30c26339c)

### Which has more GitHub stars, aider or outlines?

aider, with 50,047 stars; outlines has 16,005.

The proof: [Aider-AI/aider on GitHub](https://github.com/Aider-AI/aider)

### Which has more tests, aider or outlines?

outlines, with 59 test files; aider has 57.

The proof: [dottxt-ai/outlines's code at commit c52af84](https://github.com/dottxt-ai/outlines/tree/c52af8472c6fe8a607a733ec11b709476af77a96)

### Which was updated more recently, aider or outlines?

outlines: its last push was on September 21, 2026, and aider's on May 22, 2026.

The proof: [dottxt-ai/outlines's commits on GitHub](https://github.com/dottxt-ai/outlines/commits)

### Which has more commits signed by AI, aider or outlines?

aider: an AI signed 89.5% of its commits, with Aider, Gemini CLI, Codex, and Claude Code; in outlines, 0.8%.

The proof: [the commits each tool signed in Aider-AI/aider](https://seerepo.com/r/Aider-AI/aider/ai)

## Sources

- Aider-AI/aider: Read on November 10, 2026, at commit 5dc9490 (https://github.com/Aider-AI/aider/tree/5dc9490bb35f9729ef2c95d00a19ccd30c26339c)
- dottxt-ai/outlines: Read on November 7, 2026, at commit c52af84 (https://github.com/dottxt-ai/outlines/tree/c52af8472c6fe8a607a733ec11b709476af77a96)

## 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.