# Apr 17, 2026

## 🌟 Think, Ask, Execute. Arkain Is Officially Here.

Arkain's Open Beta is behind us — and we're launching bigger than ever. This sprint brings Agent-powered Side Chat, MCP tool connections, and a wave of performance and reliability improvements. This is Arkain at its most capable, and we're just getting started.

### Highlights

<figure><img src="/files/tSD6ezu3Tlwge0HsV3YE" alt=""><figcaption></figcaption></figure>

🚀 **Arkain Is Now Officially Live**

We're thrilled to announce that Arkain's Open Beta has successfully concluded, and our official service is live as of April 17, 2026. Thank you for building with us through the beta — your feedback has been the driving force behind what Arkain is today.

<figure><img src="/files/uhpCgllUunp73qb7lZuu" alt=""><figcaption></figcaption></figure>

🔌 **Your Tools, Now Connected via MCP**

Connect Notion to Arkain via MCP — the first of many integrations to come. With your documentation connected, turning ideas into working projects has never been faster.

🤖 **Advanced Side Chat Experience**

* **Agent Permissions:** Manage tool and command access in the new Agent Permissions menu. Your permission states and "Approve All" preferences now persist across sessions.
* **Ask Mode:** Replaces 'Chat' mode. Ask mode allows the AI to think through complex questions with deeper context for higher precision.
* **Message Queue:** You can now send new prompts even while a response is in progress. Messages are queued and automatically processed in order once the current response is complete.

🌐 **Arkain Now Speaks Korean**

The entire Arkain interface is now available in Korean. We've added a new in-app language switcher so you can toggle between English and Korean at any time.

***

### Minor Changes

**New Features**

* **New Side Chat Default Model:** Introducing Claude Sonnet 4.6 — now available and set as the default engine for Side Chat, providing superior speed and precision over Sonnet 4.5.
* **Agent Mode Model Support:** GPT-5 Mini, GPT-5 Nano, Claude Haiku 4.5, and Gemini 3 Pro are now available in Agent Mode.

**Changes**

* **Arkain Snap Enhancement**: Now leverages Agent-based execution to improve generation speed and accuracy. It automatically iterates through fixes to ensure successful project generation.
* **Side Chat History Compression:** Added UI indicators for background context optimization to save tokens.
* **Shortcut Update:** Changed the Mode switch shortcut from Cmd+. (Mac) / Ctrl+. (Windows) to Shift+Tab.
* **Workspace UI:** Updated the membership information pop-up to clearly include GPU container benefits.
* **Visual Consistency:** Completed the 2nd-phase design system update across the Workspace for a more polished and unified experience.
* **Container Settings:** Improved the UI for the domain addition dropdown menu.

**Bug Fixes**

* **File System:** Fixed failures in file download, copy, paste, and duplicate operations.
* **Editor:** Fixed file tabs not updating when a file name is changed via terminal commands.
* **Agent Mode:** Fixed interrupted messages not being cleared when tapping 'Retry'.
* **Agent Mode Performance:** Fixed interface lag occurring during exceptionally long Agent conversations.
* **Credit Checkout:** Fixed inaccurate storage billing amounts displayed during credit purchase.
* **Credit Usage Summary:** Fixed a rounding error in the monthly total calculation display. This was a visual summation issue only; actual credit deductions and balances were not affected.
* **Notifications:** Fixed an issue where the notification count did not update correctly when receiving referral credits.

**Deprecated**

* **AI Supporter Discontinued:** Replaced by Agent Mode in Side Chat, which leverages full project context to deliver even better results autonomously.


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.arkain.io/whats-new/arkain-release-note/apr-17-2026.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.