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