The Stan Math Library is a C++ template library for automatic differentiation of any order using forward, reverse, and mixed modes. It includes a range of built-in functions for probabilistic modeling, linear algebra, and equation solving.
active 2025-01-15 → 2026-08-09 (UTC)
Activity over time
Daily event counts in the loaded window
Line chart, 572 days from 2025-01-15 to 2026-08-09. Pushes: 334 total, peak 13 in a day. Pull requests: 62 total, peak 3 in a day. Issues: 37 total, peak 2 in a day. Comments: 358 total, peak 13 in a day. Stars: 31 total, peak 2 in a day.
- Pushes
- Pull requests
- Issues
- Comments
- Stars
Stars, PRs, issues and forks are under-captured in the later part of this window. GH Archive progressively stopped capturing non-push events during 2026 — −95% or worse by the end of the window. Every series here except Pushes fades for that reason, so a decline above reflects the archive, not this repository. Pushes stay reliable throughout, so read them, and the contributor counts derived from them, as the real signal. Data health has the measurements.
Top contributors
Pushes, PRs, issues, reviews and comments — stars and forks excluded, so this is contribution rather than popularity
| Contributor | Contributions | Pushes | PRs | Comments |
|---|---|---|---|---|
| SteveBronder | 292 | 151 | 16 | 78 |
| WardBrian | 203 | 48 | 22 | 94 |
| stan-buildbot | 139 | 76 | 0 | 63 |
| andrjohns | 57 | 30 | 6 | 15 |
| syclik | 33 | 10 | 2 | 12 |
| spinkney | 21 | 7 | 1 | 9 |
| Franzi2114 | 19 | 0 | 1 | 11 |
| lingium | 16 | 1 | 2 | 7 |
| avehtari | 16 | 1 | 0 | 12 |
| bob-carpenter | 15 | 1 | 0 | 11 |
| charlesm93 | 11 | 0 | 0 | 11 |
| jachymb | 11 | 0 | 1 | 7 |
| serban-nicusor-toptal | 8 | 4 | 4 | 0 |
| drezap | 6 | 0 | 0 | 4 |
| dylex | 5 | 5 | 0 | 0 |
| dependabot[bot] | 4 | 0 | 3 | 1 |
| isaacwachsman-dot | 3 | 0 | 2 | 1 |
| mhollanders | 3 | 0 | 0 | 2 |
| JmieTng | 2 | 0 | 0 | 2 |
| yasumorishima | 2 | 0 | 0 | 2 |
Recent activity
Latest issues, pull requests and releases
- Pull request#3330SteveBronder2026-06-05 16:12
- Issue comment#3305tmchow2026-05-23 05:40fix(reduce_sum_static): wrap Args with ref_type_t to materialize Eigen expressions
- Issue comment#3319stemangiola2026-05-22 05:31Implementation of the multinomial generalized linear model (softmax link)
- Issue comment#3326avehtari2026-05-20 13:25add integrate_1d_gauss_kronrod
- Issue comment#3317stan-buildbot2026-05-13 06:35student_t_qf only returns column eigen vectors now
- Issue comment#3313jachymb2026-05-11 17:51Support softmax for row_vector, matrix types + code simplifications
- Pull request#3319jachymb2026-05-10 19:50
- Issue comment#3313jachymb2026-05-05 22:15Support softmax for row_vector, matrix types + code simplifications
- Issue comment#3313stan-buildbot2026-05-05 01:23Support softmax for row_vector, matrix types + code simplifications
- Issue comment#3271WardBrian2026-05-04 18:38Update/eigen 5.0.1
- Issue comment#3314WardBrian2026-05-02 23:49Feature/issue 3311 test thread tbb exp
- Issue comment#3314drezap2026-05-02 23:38Feature/issue 3311 test thread tbb exp
- Issue comment#3314drezap2026-05-02 23:24Feature/issue 3311 test thread tbb exp
- Issue comment#3299yasumorishima2026-04-25 04:57Add geometric distribution (lpmf, cdf, lcdf, lccdf, rng)
- Issue comment#3299yasumorishima2026-04-25 02:23Add geometric distribution (lpmf, cdf, lcdf, lccdf, rng)
- Issue comment#3305SteveBronder2026-04-24 17:51fix(reduce_sum_static): wrap Args with ref_type_t to materialize Eigen expressions
- Issue comment#3271stan-buildbot2026-04-06 22:07Update/eigen 5.0.1
- Issue#3301drezap2026-04-02 10:30tbb compilation issue
- Issue comment#3301drezap2026-04-02 10:30tbb compilation issue
- Issue comment#3297stan-buildbot2026-03-25 00:54fix laplace_marginal optimization
- Issue#1875SteveBronder2026-03-24 20:26Meta Issue for Static Matrices
- Issue#3259drezap2026-03-24 14:57gp_periodic_cov() unexpected output for fixed period
- Issue comment#3146SteveBronder2026-03-17 16:00Error compiling rep_matrix inside of offset_multiplier_constrain
- Pull request#3296SteveBronder2026-03-16 21:15
- Issue comment#3275syclik2026-03-13 00:15Fix gamma lccdf
Totals cover only the window loaded into ClickHouse and count events, not GitHub's lifetime totals — 31 stars here means stars gained during the window, not the repo's star count.