---
title: "VAST COSI Driver 2.6.1 Release Notes"
slug: "vast-cosi-driver-261-release-notes-2-6"
updated: 2026-11-04T00:46:22Z
published: 2026-11-04T00:46:22Z
canonical: "docs.vastdata.com/vast-cosi-driver-261-release-notes-2-6"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.vastdata.com/llms.txt
> Use this file to discover all available pages before exploring further.

# VAST COSI Driver 2.6.1 Release Notes

VAST COSI Driver 2.6.1 is released to General Availability as of May 2025.

To upgrade to VAST COSI Driver 2.6.1, follow the upgrade procedure in the [*VAST COSI Driver Administrator's Guide*](/develop/docs/cosi-driver-administrators-guide-2-6)*​​​*.

**Note**: This driver version is not compatible with VAST Cluster 5.5.0 or later.

## New Features and Capabilities

### Support of VMS API Tokens

When used with VAST Cluster 5.3 or later, VAST COSI Driver allows for authentication of the connection to the VAST cluster by means of VMS API tokens. You can supply the VMS user's token using the new `token` parameter in the Kubernetes secret.