Changelog

Claude Opus 4.7 is now available on Retool Cloud through Anthropic and Amazon Bedrock. It can be used with AI resource queries and with Retool Agents. Opus models require you to bring your own key for AI resource queries; Retool Agents can use Opus with a Retool-managed key. Support for self-hosted Retool is coming in an upcoming release.

GPT-4 Turbo, GPT-4.1 Nano, and GPT-5.4 are also now available for use with Retool Agents.

You can now select the Python version used by a workflow from the Languages & Libraries tab. Click ... next to Python, select Update version, and choose between Python 3.10 and 3.14.

Python 3.14 does not include built-in libraries. When you upgrade, Retool automatically identifies any built-in libraries your workflow uses and installs them as custom libraries.

GPT Image 2 is now available through OpenAI. It can be used for image generation with AI resource queries.

Retool now supports an MCP server, which enables you to interact with your Retool organization from your chosen agentic environment.

Retool's MCP server currently supports tools that help you manage your organization and its users. For example, you can use the MCP for the following use cases:

• Write queries against resources to power data analysis.
• Bulk-invite users or manage pending invites.
• Audit the users who have access to your organization.
• Inspect organization and resource environment configurations.
• List all connected resources and see their configuration.

Refer to the tool reference for the full list.

Retool is actively adding additional tools that expand the capabilities of the MCP server to include additional Retool functionality, including app building.

Python 3.10 will reach end of life on October 31, 2026. After this date, Retool will no longer support Python 3.10 in Workflows.

What's changing​

New and existing workflows on Python 3.10 will continue to run but they will not be supported. They will not be automatically migrated to a newer version.

How to upgrade existing workflows​

Python 3.14 is rolling out to cloud instances and will be available in an upcoming self-hosted release.

1. Open the workflow and go to the Languages & Libraries tab.
2. Click ... next to Python and select Update version.
3. Choose Python 3.14 and click Apply.

When you upgrade, Retool automatically identifies built-in libraries your workflow uses and installs them as custom libraries. Python 3.14 is mostly backwards-compatible, but Retool recommends publishing a workflow release before upgrading so you can revert if needed.

See Configure Python version for full details on how to upgrade and revert to a previously published release.

Timeline​

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

• Retool 3.334.8
• Retool 3.300.24
• Retool 3.300.23
• Retool 3.284.29

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

Retool 3.375 is now available on the Edge release channel for self-hosted organizations.

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

• Retool 3.334.7
• Retool 3.300.22

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

Retool 3.371 is now available on the Edge release channel for self-hosted organizations.

You can now delete workflows programmatically using the DELETE /api/v2/workflows/{workflowId} endpoint in the Retool REST API.

To use this endpoint, your API token must have the workflows:write scope. The endpoint only supports deleting standard workflows—deleting agents and functions via the API is not supported.

Refer to the Retool API reference for full endpoint details, including request parameters and error responses.