How much of cpython did AI write?
0.3%
LinkedInWho signed the commits
Commits per month
Each month's commits up to its last one, with those an AI signed. Merges don't count.
- Signed by AI
- People
The figures, month by month
| Month | Commits | Signed by AI | Share |
|---|---|---|---|
| Nov 2026 | 95 | 10 | 10.5% |
| Oct 2026 | 649 | 31 | 4.8% |
| Sep 2026 | 466 | 46 | 9.9% |
| Aug 2026 | 384 | 40 | 10.4% |
| Jul 2026 | 503 | 155 | 30.8% |
| Jun 2026 | 485 | 105 | 21.6% |
| May 2026 | 449 | 2 | 0.4% |
| Apr 2026 | 367 | 3 | 0.8% |
| Mar 2026 | 410 | 3 | 0.7% |
| Feb 2026 | 307 | 4 | 1.3% |
| Jan 2026 | 332 | 0 | 0% |
| Dec 2025 | 394 | 1 | 0.3% |
| Nov 2025 | 388 | 1 | 0.3% |
| Oct 2025 | 374 | 0 | 0% |
| Sep 2025 | 382 | 0 | 0% |
| Aug 2025 | 251 | 1 | 0.4% |
| Jul 2025 | 320 | 0 | 0% |
| Jun 2025 | 299 | 0 | 0% |
| May 2025 | 595 | 0 | 0% |
| Apr 2025 | 536 | 0 | 0% |
| Mar 2025 | 477 | 0 | 0% |
| Feb 2025 | 396 | 0 | 0% |
| Jan 2025 | 451 | 0 | 0% |
| Dec 2024 | 265 | 0 | 0% |
The last commits an AI signed
- f88565bgh-93821: Keep asyncio proactor servers accepting after a connection reset (#161238)Claude· Nov 4, 2026
- 1db5966gh-159184: Do not intern NaN constants on the free-threaded build (GH-161276)Claude· Nov 4, 2026
- 7e3290dgh-87613: Use AC and AC vectorcall for filter (#160792)Claude· Nov 3, 2026
- 9c37326Add @cmaloney to CODEOWNERS for `io` (#161269)Claude· Nov 3, 2026
- 4c497b1gh-159446: Avoid TypeError on FileIO construction (#159480)Claude· Nov 3, 2026
- 6d31270gh-87613: AC VC add support for *args and use it for zip (#160944)Claude· Nov 3, 2026
- 0626b14gh-159875: Keep the SSL protocol of a closed transport after connection loss (#160069)Claude· Nov 2, 2026
- eeafc73gh-160986: Fix flaky test_popping_python_frame_is_not_native (#161073)Claude· Nov 2, 2026
- a7c0383gh-87613: Use AC and AC vectorcall for bool (#160791)Claude· Nov 1, 2026
- efeeb6cgh-132042: Speed up slot lookup during class creation (#159479)Claude· Nov 1, 2026
How we know
Every AI coding tool leaves its signature in the commits it makes: a Co-Authored-By line, its own author name, or the merge of its branch. SeeRepo reads those signatures in the repo's history; a commit without one counts as made by people, and merges don't count.
Every AI tool SeeRepo recognizes →Frequently asked questions
Which AI tool signed the most commits in cpython?
Claude, with 401 of the 121,756 commits of cpython.
The proof: its last signed commit, f88565b
Since when does AI sign commits in cpython?
Since August 2025: the first month an AI tool signed a commit of cpython.
How many commits does cpython have?
cpython has 121,756 commits since August 9, 1990. Merges don’t count.
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