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outlines vs ray

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

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What they share and what sets them apart

dottxt-ai

outlines

Structured Outputs

Python16kRead on November 7, 2026, at commit c52af84What is outlines built with?

Only in outlines

In common

ray-project

ray

Ray is an AI compute engine. Ray consists of a core distributed runtime and a set of AI Libraries for accelerating ML workloads.

Python44.3kRead on November 10, 2026, at commit c99c603What is ray built with?

Only in ray

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
outlines26,890 lines written46 code files
ray1,551,053 lines written2,797 code files
Who writes itA commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
outlines0.8% of its commits signed by AIWith Claude Code and GitHub Copilot
ray3.7% of its commits signed by AIWith Claude Code, Gemini CLI, GitHub Copilot, Cursor, and Codex
ActivityFrom GitHub and its history, on the day SeeRepo read it.
outlinesLast push September 21, 20261,324 commits16,005 stars
rayLast push November 10, 202632,424 commits44,251 stars
TestsThe files that test the code, and the share of code files a test imports.
outlines59 test files84.8% of its code files have a test that imports them
ray2,192 test files9.5% of its code files have a test that imports them

Frequently asked questions

Which is bigger, outlines or ray?
ray, with 1,551,053 lines written; outlines has 26,890.

The proof: ray-project/ray's code at commit c99c603

Which has more GitHub stars, outlines or ray?
ray, with 44,251 stars; outlines has 16,005.

The proof: ray-project/ray on GitHub

Which has more tests, outlines or ray?
ray, with 2,192 test files; outlines has 59.

The proof: ray-project/ray's code at commit c99c603

Which was updated more recently, outlines or ray?
ray: its last push was on November 10, 2026, and outlines's on September 21, 2026.

The proof: ray-project/ray's commits on GitHub

Which has more commits signed by AI, outlines or ray?
ray: an AI signed 3.7% of its commits, with Claude Code, Gemini CLI, GitHub Copilot, Cursor, and Codex; in outlines, 0.8%.

The proof: the commits each tool signed in ray-project/ray

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