> ## Documentation Index
> Fetch the complete documentation index at: https://giselle.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# December 23, 2025

> GPT-5.2 & Gemini 3 Flash models, new Tasks page, Start/End node improvements, and security enhancements

This update brings new AI models, a redesigned Tasks page, improved Start/End node experience, and important security fixes.

## New AI Models

### GPT-5.2 Support

Added **GPT-5.2**, OpenAI's most capable flagship model with significant improvements in general intelligence, instruction following, and code generation:

* Configurable reasoning effort levels (`none`, `low`, `medium`, `high`, `xhigh`)
* Text verbosity control (`low`, `medium`, `high`)
* Enhanced vision capabilities and tool calling

### Gemini 3 Flash

Added **Gemini 3 Flash** model support with SDK upgrade, offering enhanced reasoning capabilities and improved performance for complex tasks.

## New Tasks Page

Introduced a dedicated **Tasks page** for viewing and managing your workflow execution history:

* Revamped tasks list layout with better organization
* Enhanced final step output display with count indicator
* Improved task detail page with status indicators
* Entrance/exit animations for task overlay
* Optimistic submission for smoother task execution

## Start/End Node Improvements

Significant updates to the app entry and exit nodes:

* **Renamed "App Entry" to "Start"** — clearer terminology throughout the application
* **Auto-pairing** — creating a Start node automatically creates a paired End node
* Enhanced node panels with improved styling
* Stage run readiness checks ensure proper configuration

## Node Naming Updates

Improved clarity with renamed nodes and categories:

* **Query Node** renamed to **Vector Query** for better understanding
* **Event grouping** renamed to **Integration** in the toolbar

## UI/UX Improvements

* Playground now autofocuses on prompt input when navigating
* Improved file attachment preview UI
* Replaced markdown rendering with Streamdown for better performance
* Updated recommended models display for Free/Pro tiers
* Fixed sample apps visibility for new users

## Subscription Management

* Implemented scheduled subscription cancellation at billing period end
* Smoother subscription lifecycle management

## Security Enhancements

Important security improvements in this release:

* Fixed Next.js DoS vulnerability (CVE-2025-55184)
* Encrypted OAuth tokens with AES-256-GCM
* Prevented Host Header Injection in OAuth callbacks
* Implemented timing-safe comparison for signed cookie verification
* Security fix for HMAC signature verification (jws 4.0.1)

## Architecture Improvements

* Migrated to modular app designer store with Zustand for better state management
* Major internal refactoring for improved maintainability

***

*This release includes [v0.55.2](https://github.com/giselles-ai/giselle/releases/tag/v0.55.2) through [v0.59.1](https://github.com/giselles-ai/giselle/releases/tag/v0.59.1)*


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