OpenVINO Model Server 2026.4.1

This is a hotfix release including bug fixes in the server component and OpenVINO Runtime.

Improvements included:

• Updated OpenVINO Runtime to 2026.4.1 version.
• DFlash algorithm can not accept requests without setting max_tokens parameter. Earlier, deployment with DFlash algorithm, it was mandatory to set max_tokens in all request to LLM models. Check Speculative Decoding Demo for instructions how to run it.
• Fixed duplicated reporting of model /v1/models endpoint when Idle model management is enabled. #4604

Deprecation notice

Starting from next release the following capabilities are planned to be dropped:

• packages targeted on Ubuntu22 will not be published. Best effort support for building will be supported until 2027.0. There is planned adding Ubuntu26 packages.
• MediaPipe calculators using TensorFlow dependency will be removed from OVMS. In result demos iris_tracking and holistic will be removed. Other calculators with improved performance will be added instead.

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You can use OpenVINO Model Server public Docker images based on Ubuntu via the following command:

• docker pull openvino/model_server:2026.4.1 - CPU device support with image based on Ubuntu 24.04
• docker pull openvino/model_server:2026.4.1-gpu - GPU, NPU and CPU device support with image based on Ubuntu 24.04

or use provided binary packages. Only packages with suffix _python_on have support for python.

There is also additional distribution channel via https://storage.openvinotoolkit.org/repositories/openvino_model_server/packages/2026.4.1/