Changelog

Retool 3.383 is now available on the Edge release channel for self-hosted organizations.

Admins can now configure memory limits for workflow code execution at the org level, and workflow editors can override those limits on a per-workflow basis.

• Org-level defaults: In Settings, go to the Advanced section and click Advanced settings to set a default memory limit (MB) that applies to all workflow runs in your organization.
• Workflow-level overrides: Open any workflow and go to Settings to override the org default for that workflow.

When a workflow runs a code block, the executor enforces the most specific limit available (workflow > org > server default). If a block exceeds its limit, it fails immediately with a clear error.

Customers who are not configuring limits see no behavior change — the server default of 2,500 MB memory applies. For customers whose workflows were hitting out-of-memory errors, limits can now be tuned without requiring infrastructure changes.

Gemini 3.1 Pro (Preview), Gemini 3 Flash (Preview), and Gemini 3.1 Flash-Lite (Preview) are now available in Retool through Google. They can be used with AI resource queries.

Gemini 3.1 Pro (Preview) and Gemini 3.5 Flash can now be used to build apps, through both Google and Google Vertex AI. Refer to the AI models reference to see which models support app building.

Retool now provides a native integration for ClickHouse, an open-source column-oriented database designed for real-time analytics. You can create a ClickHouse resource and use it to query analytical data with SQL—including ClickHouse-specific functions and aggregations—build dashboards on live data, and insert records from apps and automations.

Retool is phasing out support for MongoDB Server version 3.4 and earlier. Organizations with an unsupported version of MongoDB Server connected to Retool must upgrade to MongoDB Server 3.6 or later.

• For cloud organizations, support for MongoDB Server 3.4 and earlier has already been removed.
• For self-hosted organizations, support for MongoDB Server 3.4 and earlier will be deprecated in the Q2 2026 stable release. It will be removed in the Q3 2026 stable release.

MongoDB Server 3.4 has been end of life (EOL) since January 2020. We recommend upgrading to a currently supported MongoDB release.

GPT-5.5 and GPT-5.3 Codex are now available in Retool through OpenAI. They can be used with AI resource queries and with Assist. GPT-5.5 is also available for use with Retool Agents.

Retool now provides a native integration for Azure Blob Storage, Microsoft's scalable object storage service. With the Azure Blob Storage resource, you can upload and download files, generate signed URLs for temporary secure access, and copy, delete, and organize objects across containers—all from Retool apps and automations.

Claude Opus 4.7 is now available on Retool Cloud through Anthropic and Amazon Bedrock. It can be used with AI resource queries, with Retool Agents, and in Assist. Opus models require you to bring your own key for AI resource queries and Assist; 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.