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cmdstanpy vs OpenHouse

A side-by-side editorial comparison of cmdstanpy and OpenHouse — release velocity, themes, recent moves, and the top alternatives to consider.

cmdstanpy vs OpenHouse: at a glance

FeaturecmdstanpyOpenHouse
SectorAnalyticsAnalytics
Velocity score0.05.0
Sparks · 30d00
Top themesbayesian, stan, mcmc, deprecationsiceberg, data governance, table policies, observability
Last editorial update1h ago2h ago
WebsiteVisit →Visit →

What is cmdstanpy?

CmdStanPy is clearing deprecations ahead of a 2.0 it keeps announcing.

CmdStanPy is at v1.3.0, which added a diagnose method on CmdStanModel, sampler timing information, create_inits() across the stanfit classes, and much faster MCMC CSV parsing. Every release in this window opens with the same notice: the next non-bugfix release will be 2.0 and will remove existing deprecations. In line with that, 1.3.0 drops Python 3.8 and renames the metric argument to inv_metric.

Read the full cmdstanpy trajectory →

What is OpenHouse?

OpenHouse is hardening the seams where table policies and jobs quietly fail.

OpenHouse ships continuously — five releases in the twelve days covered here — with each tag carrying a single merged pull request. The substantive recent work sits in two areas: table governance, where CREATE OR REPLACE AS SELECT was silently dropping retention, replication, history and PII column tags, and operability, where the DataLoader gained a typed exception hierarchy with per-request IDs and the scheduler gained targeted log tokens. Table feature toggles also picked up self-service overrides that let table owners opt in to a feature the server has not ramped.

Read the full OpenHouse trajectory →

cmdstanpy vs OpenHouse: editorial side-by-side

C
cmdstanpy
ANALYTICS
0.0

CmdStanPy is clearing deprecations ahead of a 2.0 it keeps announcing.

◆ Current state

CmdStanPy is at v1.3.0, which added a diagnose method on CmdStanModel, sampler timing information, create_inits() across the stanfit classes, and much faster MCMC CSV parsing. Every release in this window opens with the same notice: the next non-bugfix release will be 2.0 and will remove existing deprecations. In line with that, 1.3.0 drops Python 3.8 and renames the metric argument to inv_metric.

◆ Where it's heading

The package tracks upstream Stan and prepares for its own break. New inference methods arrive as Stan ships them — Laplace with Stan 2.32, Pathfinder with 2.33 — while the interface work is mostly deprecation staging and CSV input-output performance. The repeated 2.0 warning across two years of releases suggests the cut has been deferred more than once.

◆ Prediction

The notice at the top of every release points to 2.0 as the next non-bugfix version, removing the deprecations staged here including the metric argument.

O
OpenHouse
ANALYTICS
5.0

OpenHouse is hardening the seams where table policies and jobs quietly fail.

◆ Current state

OpenHouse ships continuously — five releases in the twelve days covered here — with each tag carrying a single merged pull request. The substantive recent work sits in two areas: table governance, where CREATE OR REPLACE AS SELECT was silently dropping retention, replication, history and PII column tags, and operability, where the DataLoader gained a typed exception hierarchy with per-request IDs and the scheduler gained targeted log tokens. Table feature toggles also picked up self-service overrides that let table owners opt in to a feature the server has not ramped.

◆ Where it's heading

The project is at the stage where correctness at the edges matters more than new surface: policies surviving a replace, auth failures not being retried as if they were transient, scheduler decisions being greppable in production logs. The observability work is explicitly phased, with OTEL gauges and DLQ counters deferred to a later step, so instrumentation is being staged rather than dropped in at once. The pattern of one PR per release tag means the feed reads as a commit log and the meaningful changes have to be picked out of dependency bumps.

◆ Prediction

Phase 2 of the jobs observability plan — OTEL gauges, a heartbeat sampler, and dead-letter-queue counters — is named in the notes as deferred and is the most likely next substantive change.

Alternatives to cmdstanpy and OpenHouse

Other Analytics products tracked by Sparkpulse, ranked by recent ship velocity. Each card links to a full editorial trajectory and lets you pivot into a head-to-head comparison with either cmdstanpy or OpenHouse.

See all cmdstanpy alternatives → · See all OpenHouse alternatives →

Recent activity from cmdstanpy and OpenHouse

Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.

  1. 18h agoOpenHouseMetrics for misconfigured HCR tables
  2. 8d agoOpenHouseCREATE OR REPLACE no longer silently drops table policies
  3. 9d agoOpenHouseBump iceberg-core to 1.2.0.20
  4. 9d agoOpenHouseScheduler log tokens for jobs observability
  5. 11d agoOpenHouseDataLoader gains request IDs and typed catalog exceptions
  6. 11d agoOpenHouseTable owners can self-serve onto server-gated features
  7. 9mo agocmdstanpydiagnose method, sampler timings and faster CSV parsing
  8. 2y agocmdstanpyFixes from_csv() for CmdStan 2.35 and later
  9. 2y agocmdstanpyCmdStan 2.35 test fixes and multi-chain profile output
  10. 2y agocmdstanpypyproject.toml build and pathfinder() argument fixes
  11. 2y agocmdstanpyNew Pathfinder arguments and warmup without adaptation
  12. 2y agocmdstanpyLaplace method and Pathfinder exposed from upstream Stan

Frequently asked questions

What is the difference between cmdstanpy and OpenHouse?

They serve adjacent needs but don't currently overlap on shipped themes. OpenHouse is currently shipping more aggressively (velocity 5.0 vs 0.0), with 0 editorial sparks in the last 30 days against 0. See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.

Is cmdstanpy better than OpenHouse?

Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. OpenHouse is currently shipping more aggressively (velocity 5.0 vs 0.0), with 0 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other Analytics products to evaluate alongside.

What are the best alternatives to cmdstanpy?

Top cmdstanpy alternatives in Analytics are ranked by recent ship velocity. Browse the "cmdstanpy alternatives" section above for the current picks, or visit /alternatives/cmdstanpy for the full list with editorial commentary on each.

What are the best alternatives to OpenHouse?

Top OpenHouse alternatives in Analytics are ranked by recent ship velocity. Browse the "OpenHouse alternatives" section above for the current picks, or visit /alternatives/openhouse for the full list with editorial commentary on each.