Releasesby GlyphPython 3.15 is now the default Python version
We have changed the default Python version, used by Python apps that do not specify an explicit Python version, from Python 3.14 to Python 3.15. For Cedar-generation apps this change does not affect existing apps, since the Python classic buildpack pins the Python version to the same major Python version as the previous cached build.
Also shipped Nov 9, 2026Heroku in November 2026 →
The following AlloyDB AI features and improvements are generally available ( GA ): - Smart batching for AI...
The following AlloyDB AI features and improvements are generally available ( GA ): Smart batching for AI functions: AI function acceleration is generally available for ai.if , ai.rank , ai.analyze_sentiment , ai.summarize , ai.extract , ai.classify , and ai.generate on AlloyDB clusters running PostgreSQL 17 and later.
To support your FinOps practices, you can now opt in to compute cost attribution in BigQuery editions
To support your FinOps practices, you can now opt in to compute cost attribution in BigQuery editions. This feature attributes billed compute charges directly to the query projects that use your administration project's reservation capacity.
Query performance troubleshooting and job and system performance comparison in the BigQuery jobs explorer are...
Query performance troubleshooting and job and system performance comparison in the BigQuery jobs explorer are generally available (GA). For more information, see Troubleshoot job performance and Diagnose performance regressions by comparing jobs and systems .
When you create or schedule a pipeline, you can specify the maximum number of concurrently executed pipeline...
When you create or schedule a pipeline, you can specify the maximum number of concurrently executed pipeline tasks. This feature is generally available (GA).
You can use compression functions in GoogleSQL to compress or decompress bytes or string values by using the...
You can use compression functions in GoogleSQL to compress or decompress bytes or string values by using the Zstandard (Zstd) lossless data compression algorithm. The following functions are supported: ZSTD_COMPRESS ZSTD_DECOMPRESS_TO_BYTES ZSTD_DECOMPRESS_TO_STRING These functions are in Preview .
Fast mode for Anthropic Claude models is generally available
Fast mode for supported Anthropic Claude models, starting with Claude Fable 5.2 ( claude-fable-5-2 ), is available in General Availability (GA) . You can set "speed": "fast" in online pay-as-you-go prediction requests to accelerate output token generation for latency-sensitive agentic workflows.
More from HerokuEvery Heroku release →
Heroku-22, Heroku-24 and Heroku-26 stacks updated
We have updated the heroku-22 , heroku-24 and heroku-26 stacks to pick up security and bug fixes in upstream packages. The new base images for each stack will roll out automatically to the Common Runtime over the next 48 hours, followed by Private Spaces .
Ruby apps now default to Node version 26.13.0
Applications using the heroku/ruby buildpack that do not have Node installed by another buildpack will now default to Node version 26.13.0.
JRuby version 10.1.3.0 is now available
JRuby version 10.1.3.0 is now available on Heroku. Users can specify this version by adding the engine configuration directive to their Gemfile.
JRuby version 10.0.8.0 is now available
JRuby version 10.0.8.0 is now available on Heroku. Applications can run on this version by configuring the ruby directive in their Gemfile.
Node.js default version is now 26.x
Heroku has updated the default Node.js version for builds to 26.x following Node.js 26.x reaching Active LTS status. Builds that explicitly specify a Node.js version remain unaffected.
Updated payment method experience for Heroku billing
Heroku updated its billing system to process new or modified payment methods via a secure Stripe-hosted interface starting November 3, 2026.
Python buildpacks updated to Pipenv 2026.10.4 and uv 0.13.6
We have updated the package managers used during the build of Python apps as follows: uv updated from 0.13.4 to 0.13.6 ( changelog ) And for Cedar-generation Python apps only: Pipenv updated from 2026.10.2 to 2026.10.4 ( changelog )
Unified login for Sendgrid add-on
Heroku Sendgrid add-on customers must now create a Sendgrid account to access the service.