Release History
Last updated
Last updated
Beginning in 2025, new release rules will apply to Backend.AI. Long Term Support (LTS) versions will be released at the end of the first and third quarters each year. These LTS versions will focus on stability, receiving ongoing maintenance and bug fixes throughout the year. New features and enhancements will be introduced in separate releases, ensuring that LTS versions remain stable while revisions allowing for continued improvement in the platform.
Backend.AI 25.6 is the Long Term Support (LTS) version of the Backend.AI.
Refer to for further informations.
(released 25.04.21) Bug fixes to increase stability.
(released 25.04.28) Bug fixes to increase stability.
(released 25.04.29) Bug fixes to increase stability.
Backend.AI 25.5 released. Refer to for further informations.
Backend.AI 24.09 is regular update version of Backend.AI.
Backend.AI 24.03 is regular update version of Backend.AI.
Backend.AI 25.4 released. Refer to for further informations.
Backend.AI 25.3 released. Refer to for further informations.
Backend.AI 25.2 released. Refer to for further informations.
Refer to for further informations.
(released 24.11.25) Multiple bug fixes to increase stability.
(released 24.11.29) Allow admins to delete other users' vfolders by enabling vfolder fetching for precondition checks, multiple bug fixes to increase stability.
(released 24.12.9) Allow purging vfolders by enabling name-based queries of deleted VFolders.
(released 24.12.11) Stability improvement.
(released 25.01.04) Add several commonly used GPU configuration environment variables defined in containers by default.
(released 25.02.07) Update SDK to retrieve and use IDs for VFolder API operations, multiple bug fixes to increase stability.
(released 25.02.18) Added multiple configure options.
Refer to for further informations.
(released 24.04.17) Improved exception logging stability by pre-formatting exception objects, Introduced mgr schema dump-history and mgr schema apply-missing-revisions command to ease the major upgrade, updated etcd-client-py to 0.3.0, and some bug fixes to increase stability.
(released 24.05.01) Allowed self-ssh in single-node single-container compute sessions, allowed agent to report its internal registry snapshot via UNIX domain socket server, deprecated the reliance on HTTP cookies for authenticating the pipeline service, and some bug fixes to increase stability.
(released 24.06.04) Added support for mounting arbitrary VFolders on model service session, revamped images GQL queries, added parameters to check-presets SDK function, and some bug fixes to increase stability.
(released 24.06.20) Added support for CentOS 8 based kernels, added support for model service provisioning without model-definition.yaml, and some bug fixes to increase stability.
(released 24.06.21) Bug fixes to increase stability.
(released 24.08.04) Added a pre-setup configuration menu to the TUI installer, added support for PureStorage RapidFiles Toolkit v2, allowed superadmins to force-update session status, and some bug fixes to increase stability.
(released 24.08.13) Added an enable_LLM_playground option to show/hide the LLM playground tab on the serving page, added max_atom_plus_device_per_container config on webserver, and some bug fixes to increase stability.
(released 24.08.23) Added scaling_group.agent_count_by_status and scaling_group.agent_total_resource_slots_by_status GQL fields, added new VFolder API to update sharing status, and some bug fixes to increase stability.
(released 24.09.27) Added an explicit configuration scaling-group-type to agent.toml, added support for setting a timeout when pulling Docker images and upgrade aiodocker to version 0.23.0, and some bug fixes to increase stability.
(released 24.10.21) Added vast_use_auth_token config to optionally utilize VASTData API token, and some bug fixes to increase stability.