Changelog

Business and Enterprise organizations can now use the Retool API to authenticate apps that are embedded in an app or website external to Retool.

Once configured, the custom authentication flow exchanges an API token for an embed URL. When a parent app authenticates a user using your preferred authentication method, the parent app makes an API request to Retool to generate an embed URL. This embed URL is a secure, single-use link on the domain of your published app. Loading it in the iframe exchanges the link for a session, sets the cookies the app needs, and then displays the app.

Standard authentication through Retool remains supported.

You can now prompt the app building agent to create REST API or PostgreSQL resources directly from the app builder.

Describe the resource that you want to create, and the agent initiates the resource creation process. You'll be asked to provide credentials or more details where applicable.

Retool now supports the following new AI models for AI resource queries:

• GPT 6 Luna.
• GPT 6 Sol.
• Enterprise only: GPT Image 2.5 Flare. Must bring your own key.
• Enterprise only: GPT Image 2.5 Sunburst. Must bring your own key.

The following patches are now available on the Stable release channel:

• Retool 4.34.6
• Retool 4.0.19
• Retool 3.334.31

Update your Retool instance to apply the latest bug fixes and security patches.

Organizations on the Team plan can now use Retool-provided AI models for app building, in addition to the full catalog of supported models. These models, prefixed with Retool, have been tuned by Retool for enhanced performance and speed for app building.

If the organization has not set a preferred resource for AI app building, the app building agent will use a Retool-provided model.

The following Retool-provided models are supported:

• Retool Mini
• Retool Power

Claude Opus 5.5 is now available in Retool through Anthropic for all paid plans and through Amazon Bedrock for Enterprise plans. It can be used in the following ways:

• For AI resource queries with your own key.
• For app building with a Retool-managed key or with your own key.

The following patches are now available on the Stable release channel:

• Retool 4.34.5
• Retool 4.0.18

Update your Retool instance to apply the latest bug fixes and security patches.

Retool 4.66 is now available on the Edge release channel for self-hosted organizations.

Retool has concluded the public beta period for Assist, and Assist is no longer available in the classic app builder for most cloud or self-hosted instances. Certain customers retained access until December 31, 2026, in order to migrate off the tool. If your organization retained access, see Assist for supported models and setup instructions.

The drag-and-drop experience for building and maintaining classic apps is still available. For an AI-powered building experience, Retool recommends using the new app builder. Converting your classic apps to the new app builder is free for Team, Business, and Enterprise organizations.

If you have any questions, reach out to the Community Forum or your account manager.

Starting January 1, 2027, Retool is deprecating Retool Email for organizations on the Free plan. After this date, Free plan organizations can no longer use Retool Email to send emails from apps, workflows, or other automations.

Retool Email remains available to organizations on the Team, Business, and Enterprise plans.

Who is affected​

This change affects cloud-hosted organizations on the Free plan that use Retool Email. Organizations on paid plans are not affected.