> For the complete documentation index, see [llms.txt](https://docs.unitlab.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.unitlab.ai/release-notes/2026-releases.md).

# 2026 RELEASES

{% updates format="full" %}
{% update date="2026-07-30" %}

## v4.5.0 — Advanced annotation, custom embeddings, analytics, and seat billing

**Features**

* Added cross-type layer ordering, copy/cut/paste, polygon brush and square brush tips, multi-object selection, bulk actions, and forward/backward/full auto-tracking.
* Added native passive-video playback with fractional interpolation, directional tracking menus, smarter chunk loading, and tracking protection during navigation.
* Added custom embedding spaces, custom metadata filters, richer Data Assets tags and keyframe sorting, HTML text support, bulk class creation, and external-service health monitoring.
* Added workflow-based workspace analytics, review and issue metrics, fixed-license support, Free and per-seat subscription plans, trial guidance, and seat-aware billing UI.

**Fixes**

* Prevented lost or resurrected annotations during late chunk loads, failed RLE work, undo/redo, multiview sync, navigation, and long-running tracking.
* Stabilized native video frame sync, playback recovery, brush interpolation, frame-range retries, and medical/workbench panel state.
* Corrected Data Assets detach gating, stuck video/medical attachment recovery, embedding scope and projection races, member analytics scope, and duplicate tag resolution.
* Fixed ontology/workflow/SDK contract regressions, billing redirects and quantities, workspace route synchronization, and final-page loading.
  {% endupdate %}

{% update date="2026-06-24" %}

## v4.4.0 — Multimodal Workbench, workflow graphs, and Data Assets

**Features**

* Added the Multiview Workbench with current-file and neighboring-file layouts across image, video, audio, text, PDF, and medical data.
* Added graph-based workflows with dataset, annotate, review, model, complete, and archive stages; stage queues, assignment, progress, actions, and project migration.
* Added the Data Assets library with folders, assets, dataset versions, lifecycle states, advanced filters, activity history, cloud providers, collections, frame browsing, auto-grouping, and grouped project work units.
* Added grouped-data releases, cuboid annotation, interpolation authoring, annotation copy/paste, infinite data grids, and richer annotation previews.

**Fixes**

* Corrected Workbench permissions, panel state, history targets, medical views, video recovery, source scoping, and grouped navigation.
* Fixed queue pagination and ordering, workflow counts and archive behavior, cloud-provider regressions, project video thumbnails, and slow repeated data lookups.
* Stabilized nested properties, brush interpolation, pending saves, class synchronization, and medical 4-up MPR layout.
  {% endupdate %}

{% update date="2026-05-30" %}

## v4.3.0 — Versioned ontologies, mixed-data projects, roles, and SAM 3

**Features**

* Added versioned ontologies with Draft and Live states, history, snapshots, import, duplicate, publish, archive, restore, and deleted-item recovery.
* Added typeless mixed-data projects and capability-based annotation schemas across image, video, audio, text, medical, and document resources.
* Added workspace roles and permission management, redesigned workspace settings, member analytics, billing and usage, cloud storage, profile, and Google Authenticator 2FA.
* Added SAM 3 class-prompted “detect all” with confidence review and video/medical tracking.

**Fixes**

* Corrected ontology binding and rename behavior, member counts, assignment scope, folder filters, and selected-data operations.
* Hardened authentication and invitation rate limits, Stripe webhook verification, password-reset tokens, cross-tenant video access, permission delegation, and production CORS.
* Fixed SAM popup placement, annotation cursor and overlay issues, and API-key table layout.
  {% endupdate %}

{% update date="2026-04-28" %}

## v4.2.0 — Medical multiview, embeddings, filters, and release delivery

**Features**

* Added medical Axial, Sagittal, Coronal, and 3D layouts with plane-aware annotation, viewport selection, timelines, SAM support, and cached volumes.
* Added nested class and item properties, datasource archiving, folders, advanced filters, full-text search, embedding visualization, and filter-aware assignment.
* Added video/medical release formats, all-splits SDK bundles, stable release download tokens, and richer release counts and metadata.
* Added priority and bulk tag actions plus a redesigned notification center.

**Fixes**

* Corrected DICOM spacing, 3D scaling, viewport sync, brush scaling, video navigation, text/relation saves, and pending annotation commits.
* Improved N+1 queries, release and SDK validation, metadata fallbacks, filter counts, role-aware assignment, and worker memory use.
* Fixed statistics layout, notification counts, upload states, archive visibility, and responsive project navigation.
  {% endupdate %}

{% update date="2026-03-24" %}

## v4.1.0 — Properties, relations, and read-only dataset viewers

**Features**

* Added class attributes, item properties, nested options, object relations, required validation, class hotkeys, and global/local class management across annotation editors.
* Added read-only dataset viewers for image, video, medical, text, and audio data, including annotations, metadata, custom tags, and release result previews.
* Added video AI-model integration, YOLOE support, text relations, audio regions, and redesigned authentication pages with dark mode.

**Fixes**

* Corrected annotation save races, undo/redo, relation editing, history refresh, comments during navigation, and object selection.
* Improved video playback, caching, medical tracking, dataset navigation, property rendering, and class selection.
* Fixed release-result truncation for large JSON and several authentication, routing, and UI consistency issues.
  {% endupdate %}

{% update date="2026-02-24" %}

## v4.0.0 — Unified image, video, and medical annotation

**Features**

* Introduced the shared annotation engine for image, video, and medical data with boxes, polygons, segmentation masks, skeletons, lines, points, timelines, object lists, history, and reviewer actions.
* Added SAM-assisted segmentation, Auto Crop, tracking, frame-aware video and medical annotation, multi-pending objects, visibility controls, and undo/redo.
* Added client-side frame and image caching, priority downloads, lazy WASM workers, and richer dataset and project previews.
* Expanded release delivery, video automation, AI-model tracking, SDK behavior, and modality-aware usage limits.

**Fixes**

* Corrected memory leaks, blob cleanup, cache races, frame-download stalls, playback freezes, and rapid media switching.
* Fixed annotation scaling, transforms, selection, saving, visibility, segmentation rendering, timeline alignment, and object-list synchronization.
* Corrected workspace switching, project and dataset navigation, upload states, statistics, instructions, and dark-mode styling.
  {% endupdate %}
  {% endupdates %}

### Related 2026 releases

* [Unitlab Python SDK 3.0.0](/release-notes/unitlab-python-sdk-3.0.0.md)
* [Enterprise documentation revision](/release-notes/enterprise-documentation-revision.md)