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Langflow release notes

This page summarizes significant changes to Langflow in each release.

For all changes, see the Changelog.

Prepare to upgrade​

important

Whenever possible, the Langflow team recommends installing new Langflow versions in a new virtual environment or VM before upgrading your primary installation. This allows you to import flows from your existing installation and test them in the new version without disrupting your existing installation. In the event of breaking changes or bugs, your existing installation is preserved in a stable state.

To avoid the impact of potential breaking changes and test new versions, the Langflow team recommends the following upgrade process:

  1. Recommended: Export your projects to create backups of your flows:


    _10
    curl -X GET \
    _10
    "$LANGFLOW_SERVER_URL/api/v1/projects/download/$PROJECT_ID" \
    _10
    -H "accept: application/json" \
    _10
    -H "x-api-key: $LANGFLOW_API_KEY"

    To export flows from the Langflow UI, see Import and export flows.

  2. Install the new version:

    • Langflow OSS Python package: Install the new version in a new virtual environment. For instructions, see Install and run the Langflow OSS Python package.
    • Langflow Docker image: Run the new image in a separate container.
    • Langflow Desktop: To upgrade in place, open Langflow Desktop, and then click Upgrade Available in the header. If you want to isolate the new version, you must install Langflow Desktop on a separate physical or virtual machine, and then import your flows to the new installation.

  3. Import your flows to test them in the new version, upgrading components as needed.

    When upgrading components, you can use the Create backup flow before updating option if you didn't previously export your flows.

  4. If you installed the new version in isolation, upgrade your primary installation after testing the new version.

    If you made changes to your flows in the isolated installation, you might want to export and import those flows back to your upgraded primary installation so you don't have to repeat the component upgrade process.

1.5.0​

The following updates are included in this version:

New features and enhancements​

  • Authentication changes

    To enhance security and ensure proper authentication for automatic login features, most API endpoints now require authentication with a Langflow API key, regardless of the AUTO_LOGIN setting. The only exceptions are the MCP endpoints /v1/mcp, /v1/mcp-projects, and /v2/mcp, which never require authentication. For more information, see API keys.

  • New Language Model and Embedding Model components

    The Language Model and Embedding Model components have been promoted to be the main components for your LLM and embeddings flows. They support multiple models and model providers, and allow you to experiment without swapping out single-provider components. The single-provider components are still available for your flows in the components sidebar under Bundles. For more information, see the Language model and Embedding model components.

  • MCP one-click installation

    In the MCP server page, click Auto install to install your Langflow MCP server to MCP clients with just one click. The option to install with a JSON configuration file is available for macOS, Windows, and WSL. For more information, see MCP server.

  • MCP server management

    Add, remove, and edit your MCP servers in the MCP Tools and Settings page. For more information, see MCP client.

  • Input schema replaces temporary overrides

    The Input schema pane replaces the need to manage tweak values in the API access pane. When you enable a parameter in the Input schema pane, the parameter is automatically added to your flow's code snippets, providing ready-to-use templates for making requests in your preferred programming language.

  • Tools category is now legacy

    All components in the Tools category are now Legacy or have moved to Bundles.

    The MCP Tools component is available in the components sidebar under Agents.

    Many of the Tools components performed the same functions, like web search and API requests, so we combined this functionality into single components:

    • To replace legacy search components, use the Web search component.
    • To replace legacy news aggregation components, use the News search component.

  • Stability improvements

    General stability improvements and bug fixes for enhanced reliability. See an issue? Raise it on GitHub.

New integrations and bundles​

1.4.2​

The following updates are included in this version:

New features and enhancements​

  • Enhanced file and flow management system with improved bulk capabilities.

New integrations and bundles​

  • BigQuery component for connecting to BQ datasets.
  • Twelve Labs integration bundle.
  • NVIDIA system assistant component.

Deprecated features​

  • Deprecated the Combine text component.

1.4.1​

The following updates are included in this version:

New features and enhancements​

  • Added an enhanced "Breaking Changes" feature to help update components during version updates without breaking flows.

1.4.0​

The following updates are included in this version:

New features and enhancements​

  • Introduced MCP server functionality to serve Langflow tools to MCP-compatible clients.
  • Renamed "Folders" to "Projects". The /folders endpoints now redirect to /projects.

Deprecated features​

  • Deprecated the Google Gmail, Drive, and Search components.
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