prefect 3.6.0
This release adds pydocket, a background task system, to replace FastAPI's background_tasks. Background tasks now include automatic retries and can optionally use Redis as a backing layer for enhanced durable execution.
Also shipped Nov 7, 2025Prefect in November 2025 →
Reduced compute pricing, more projects on Free plan, AI-powered onboarding release - Nov 07, 2025
Reduced compute pricing across Launch, Scale, and Agent plans. We've reduced compute pricing by up to 25% across our plans Launch plan Now $0.106 per CU hour (p...
What's new in Sigma
Data apps If/else control flow in action sequences (GA) If/else control flow is now generally available. Use if/else statements to create dynamic workflows within action sequences. If/else control flow adds flexibility to a sequence by allowing it to check one or more conditions and execute actions for the first condition that evaluates to true.
Workers automatic tracing, now in open beta
Enable automatic tracing on your Workers, giving you detailed metadata and timing information for every operation your Worker performs. Tracing helps you identify performance bottlenecks, resolve errors, and understand how your Worker interacts with other services on the Workers platform.
The little things, week ending November 7, 2025
A collection of updates to Replicate for the week ending November 7, 2025.
Expanded Language Detection: Now Supports 35 Languages for Pre-Recorded Audio
Language Detection for pre-recorded (batch) audio now supports 35 languages (previously 16), allowing you to automatically detect and transcribe a much broader array of languages with one request. Enable broader coverage by setting detect_language=true in your API call.
More from PrefectEvery Prefect release →
Prefect 3.6.1 - Pop, Lock it, Docket
Enhancements ➕ - Add client methods for querying events via REST API Bug Fixes 🐞 - Fix interactive deploy CLI selecting wrong flow when opting out - Fix deployment.parameters in nested flows using ContextVars - Add logfire sampling configuration and fix boolean env var handling Integrations & Dependencies 🤝 - Upgrade pydocket to stable 0.13.0 release
Prefect 3.6.2 - The Missing Link
Enhancements ➕ - Add causal link from automation action events to triggering events Bug Fixes 🐞 - cap retry-after for concurrency limits to prevent excessive delays - accept numeric values for PREFECT_API_SERVICES_LATE_RUNS_AFTER_SECONDS - add work_queue_id to DeploymentResponse Development & Tidiness 🧹 - correct GitHub Actions conditional syntax in...
Prefect 3.5.0 - 🎃 The Exorcism of Python 3.9 👻
Released on October 31, 2025 With the removal of Python 3.9 support, Prefect now requires Python 3.10 or later. This means you can finally say goodbye to from __future__ import annotations in your workflow code, native type annotations are now standard!
Prefect 3.6.3 - That's JSON Bourne
Enhancements ➕➕ - Add -o json output option to prefect flow-run ls command - fix: allow pause_flow_run() to pause parent flow when called from task Bug Fixes 🐞 - Use acquisition service pattern for lease-based concurrency slots - fix: respect subflow attributes (log_prints, result_storage) when running inside task - fix: defer forward reference resolution...
Prefect 3.6.4 - No Deployment Left Unparametrized
Bug Fixes 🐞 - fix: preserve event template parameters in deployment triggers - Fix truncating log behavior Integrations & Dependencies 🤝 - Chore: Bump ui library Documentation 📓 - docs: Add migration note about unmapped mutable objects
Prefect 3.4.25 - A slice of π-thon
Released on October 23, 2025 Enhancements ➕➕ - Add Python 3.14 support - Unify sync and async client methods Bug Fixes 🐞 - Upgrade Docker image SQLite to 3.50.4 to address CVE-2025-6965 - Fix GitLab credentials for self-hosted instances and deploy tokens - Make MemoryLockManager serializable with cloudpickle - Suppress noisy concurrency warnings for...
Prefect 2.20.24 - They Don't Make Workers Like This Anymore
- fix: use Pydantic v1 compatible worker metadata for Prefect 2.x
Prefect 3.4.24 - The Un-Crashening
Released on October 16, 2025 Enhancements ➕➕ - Add flow run watching with interleaved events and logs - Use shared websocket utilities for Subscription SSL and proxy support - Add --all flag to prefect automation delete Experimental 🧪 - Introduce experimental plugin system Bug Fixes 🐞 - Mitigate memory leak in in-memory messaging system - Fix duplicate...