Releases: stan-dev/stan
Releases · stan-dev/stan
Release list
v2.39.0 (19 May 2026)
- Added timing information to the output of standalone generated quantities. (#3373, #3377)
- Added a
converged__column to the output of the optimization algorithms,
which documents why the optimization algorithm halted. A string explanation
is also added as a comment. (#3379) - Changes for compatibility with Eigen 5.0.1. (#3371)
- Fixed an issue where memory was being re-allocated unnecessarily. (#3392)
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v2.39.0-rc1 (11 May 2026)
Tagging v2.39.0-rc1
v2.38.0 (13 January 2026)
-
Allow
min:maxindexing to always succeed if it is an empty selection. (#3362) -
Updated scalar templating in the serializer. (#3355)
-
Removed the uses of
forward_asfrom the stan repo and addsif constexprwhere possible. (#3357) -
Updated Pathfinder writer to avoid indexing past vector length. (#3364)
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v2.38.0-rc1 (6 January 2026)
release/v2.38.0: updating version numbers (#3369)
v2.37.0 (2 September 2025)
- Fixed a memory leak in
laplace_sample. (#3324) - Dramatically reduce the memory footprint of Pathfinder when PSIS resampling is disabled. Note that this change involves changes to thread scheduling that may result in the same seed returning draws in a different order when multiple threads are used, but the unordered set of draws should be unchanged. (#3325)
- Fixed a missing size check by directing all std::vector assigns through size-aware version. (#3352)
- Implemented serialization and deserializtion for
sum_to_zeromatrix. (#3342) - Fixed stepsize adaption being completely reset when passing
0for the size ofterm_buffer. (#3346)
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v2.37.0-rc4 (22 August 2025)
Tagging v2.37.0-rc4
v2.37.0-rc3 (18 August 2025)
Tagging v2.37.0-rc3
v2.37.0-rc2 (12 June 2025)
Tagging v2.37.0-rc2
v2.37.0-rc1 (5 June 2025)
Tagging v2.37.0-rc1
v2.36.0 (10 December 2024)
- Added de/serialization for the
stochastic_row_matrixandstochastic_column_matrixtypes. (#3298, #3304) - Added de/serialization for the
sum_to_zero_vectortype. (#3308) - Relaxed restrictions on HMC to allow running when a model has no parameters. (#3071, #3303)
- Updated
rvalue()functions that usemulti_indexto return an Eigen expression of multi indexing instead of eagerly creating a new matrix from the indices. (#3250) - Improved error messages when user-specified initializations fail. (#3291)
- Fixed progress output formatting being inconsistent for the non-adaptive samplers. (#3296)
- Improved parsing of Stan CSV files to allow for getting MCMC sample from fixed_param and samples with saved warmup draws and to be able to correctly get ADVI sample. (#3311)
- Improved parsing of Stan CSV files when they contain nan or infinite values. (#3318)
- Added a new
stan::mcmc::chainsetobject, exposing split-Rhat, split-ESS and Monte Carlo standard error diagnostics. This replaces thechains<>object. (#3312, #3313) - Fixed a header include order issue that caused compilation with
-DSTAN_MODEL_FVAR_VARto fail for certain models. (#3294) - Removed support for adding makefile variables in
~/.config/stan/make.local. Use themake/localfile in the Stan directory instead. (#3295)
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