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exo vs ray

exo and ray share 11 technologies: FastAPI, Hugging Face, anyio, AIOHTTP, datasets, lm-eval, tiktoken, transformers, jinja2, Pydantic, and psutil. Both are written in Python.

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What they share and what sets them apart

exo-explore

exo

Run frontier AI locally.

Python48.2kRead on November 5, 2026, at commit 1d72c2aWhat is exo built with?

Only in exo

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.

Python44.2kRead on November 6, 2026, at commit 77567c5What is ray built with?

Only in ray

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
exo161,527 lines written386 code files
ray1,531,664 lines written2,777 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.
exo12% of its commits signed by AIWith Claude Code, Cursor, and Jules
ray3.6% 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.
exoLast push November 5, 20262,248 commits48,204 stars
rayLast push November 6, 202632,373 commits44,213 stars
TestsThe files that test the code, and the share of code files a test imports.
exo290 test files51.6% of its code files have a test that imports them
ray2,168 test files9.7% of its code files have a test that imports them

Frequently asked questions

Which is bigger, exo or ray?
ray, with 1,531,664 lines written; exo has 161,527.

The proof: ray-project/ray's code at commit 77567c5

Which has more GitHub stars, exo or ray?
exo, with 48,204 stars; ray has 44,213.

The proof: exo-explore/exo on GitHub

Which has more tests, exo or ray?
ray, with 2,168 test files; exo has 290.

The proof: ray-project/ray's code at commit 77567c5

Which was updated more recently, exo or ray?
ray: its last push was on November 6, 2026, and exo's on November 5, 2026.

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

Which has more commits signed by AI, exo or ray?
exo: an AI signed 12% of its commits, with Claude Code, Cursor, and Jules; in ray, 3.6%.

The proof: the commits each tool signed in exo-explore/exo

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